Chevrolet - GMC - Owners Manual - 2018 - 2018 (2)

18_MUL_Duramax_Diesel_Supplement_COV_en_US_23380346C_2018MAR29.ai 1 3/22/2018 12:50:21 PM C M Y CM MY CY CMY K 23380346 C Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Contents Introduction . . . . . . . . . . . . . . . . . . . . . . 2 In Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Instruments and Controls . . . . . . . . 9 Driving and Operating . . . . . . . . . . 24 Vehicle Care . . . . . . . . . . . . . . . . . . . . 84 Service and Maintenance . . . . . 120 Technical Data . . . . . . . . . . . . . . . . 130 Index . . . . . . . . . . . . . . . . . . . . 134 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 3/23/18 2 Introduction Introduction The names, logos, emblems, slogans, vehicle model names, and vehicle body designs appearing in this manual including, but not limited to, GM, the GM logo, CHEVROLET, GMC, the CHEVROLET and GMC Truck Emblems, SILVERADO, SIERRA, DENALI, EXPRESS, SAVANA, COLORADO, CANYON, and Duramax are trademarks and/or service marks of General Motors LLC, its subsidiaries, affiliates, or licensors. For vehicles first sold in Canada, substitute the name “General Motors of Canada Company” for GMC and Chevrolet Motor Division wherever it appears in this manual. Litho in U.S.A. Part No. 23380346 C Third Printing This manual describes features that may or may not be on the vehicle because of optional equipment that was not purchased on the vehicle, model variants, country specifications, features/applications that may not be available in your region, or changes subsequent to the printing of this owner’s manual. Refer to the purchase documentation relating to your specific vehicle to confirm the features. This manual contains information that pertains to the operation of your diesel engine. It also contains your Diesel Maintenance Schedule. The sections in this manual correspond to the sections in your owner’s manual. This manual, along with © your owner’s manual, will assist you in the proper use and maintenance of your vehicle. Keep this manual in the vehicle for quick reference. Canadian Vehicle Owners A French language manual can be obtained from your dealer, at www.helminc.com, or from: Propriétaires Canadiens On peut obtenir un exemplaire de ce guide en français auprès du concessionnaire ou à l'adresse suivante: Helm, Incorporated Attention: Customer Service 47911 Halyard Drive Plymouth, MI 48170 USA 2018 General Motors LLC. All Rights Reserved. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Introduction Using this Supplement This supplement contains information specific to the unique components of the vehicle. It does not explain everything you need to know about the vehicle. Read this supplement along with the owner’s manual to learn about the vehicle's features and controls. Index A good place to look for what you need is the Index in the back of this supplement. It is an alphabetical list of what is in the supplement, and the page number where you will find it. 3 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 4 Introduction 2 NOTES Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 In Brief In Brief Initial Drive Information Transmission . . . . . . . . . . . . . . . . . . . . 5 Performance and Maintenance Engine Oil Life System . . . . . . . . . . 6 Diesel Particulate Filter . . . . . . . . . . 6 Diesel Exhaust Fluid . . . . . . . . . . . . 7 Initial Drive Information Transmission Cold Operation (8-Cylinder Pickup Models Only) When temperatures are very cold, the transmission will prevent certain operations to protect against damage. The information below shows shift range availability based on transmission oil temperature: . All shift ranges available at −25 °C (−13 °F) or above. . 2 (Second) and 3 (Third) shift ranges only at −35 °C (−31 °F) to −25 °C (−13 °F). . 2 (Second) shift range only at −35 °C (−31 °F) or lower. Torque converter clutch operation will also be prevented when air or transmission oil temperatures are below certain levels. 5 For areas where ambient temperatures are below −40 °C (−40 °F), use synthetic transmission fluid approved to Allison Transmission specification TES-295. See Recommended Fluids and Lubricants 0 126 and Automatic Transmission Fluid 0 95. Adaptive Shift Controls (8-Cylinder Pickup Models Only) The shift quality of a new vehicle may not be ideal because the Adaptive Shift Control process may not have determined the best settings for a particular shift or condition. Shift quality will improve with continued driving. Low Traction Mode (All Models) Low Traction Mode aids in vehicle acceleration on slippery road surfaces such as ice or snow. By selecting 2 (Second) using Range Selection Mode while at a stop, the transmission will limit torque to the drive wheels to prevent slippage. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 6 In Brief Heater Performance Mode (8-Cylinder Pickup Models Only) When cold weather conditions are detected, the transmission raises part throttle upshift points after the 1 (First) to 2 (Second) upshift to increase engine speed. This feature shortens engine and cab warm up times. When the transmission is in this mode, upshifts may be delayed. This is normal and does not indicate an operational problem. Four-Wheel Drive (8-Cylinder Pickup Models Only) When operating in 4 n (Four-Wheel-Drive Low), there is a very deep gear reduction. The resulting shifts will feel exaggerated. Performance and Maintenance Engine Oil Life System The engine oil life system calculates engine oil life based on vehicle use and displays the CHANGE ENGINE OIL SOON message when it is time to change the engine oil and filter. The oil life system should be reset to 100% only following an oil change. See “Engine Oil Life System” in the owner’s manual. Diesel Particulate Filter The Duramax engine is equipped with a Diesel Particulate Filter (DPF) that will filter or trap particulates. The DPF is under the vehicle in the exhaust system. Depending on a number of factors monitored by the engine computer, the DPF will need to be cleaned of accumulated solids. When a cleaning is needed, the engine computer will initiate a cleaning action by warming the exhaust gas temperature. This feature has been designed to operate automatically, with limited operator involvement or awareness. Noise may be heard at low speeds when the emission controls are active. This is normal. Cleaning the DPF (Exhaust Filter) While the DPF cleaning is automatically controlled by the engine computer, the Driver Information Center (DIC) may display a message. The vehicle will need to operate continuously until the message is no longer displayed. Cleaning occurs most effectively above 50 km/h (30 mph). If the vehicle is returned to idle during the cleaning process, the driver may notice a slightly different sound or a slightly elevated engine idle speed. This is normal. No action is required on the part of the driver during a regular DPF cleaning. See Diesel Particulate Filter 0 34. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 In Brief Special DPF Driver Messages Fuel If the vehicle is used for numerous short trips or extended slow-speed operation, the engine computer may not be able to adequately heat up the exhaust system to clean the DPF effectively. The engine computer has been designed to continuously monitor the condition of the DPF. When the engine computer detects that the DPF is nearly full of particulates and that the vehicle is not being operated in a manner that would allow effective automatic DPF cleaning, the Driver Information Center (DIC) will display a message. Use Ultra Low Sulfur Diesel Fuel (ULSD) If the vehicle continues to be driven in a manner that prevents effective DPF cleaning, the DPF will become plugged with particulates. If this occurs, the engine computer will turn on the Malfunction Indicator Lamp (Check Engine Light) in the instrument cluster, and the DIC will display the message ENGINE POWER IS REDUCED. See Diesel Particulate Filter 0 34. Use ULSD only. The emission control hardware used on the vehicle may be damaged by using fuel with high sulfur levels. Use only fuel that is dispensed from pumps bearing the ULSD label. Do Not Use Low Sulfur Diesel Fuel (LSD) Do not use fuel that is dispensed from pumps bearing the LSD label. Do Not Use Non-Highway Fuel Fuel labeled as off road or non-highway is typically very high in sulfur content and will damage the emission control system. Non-highway fuel is not intended for use in on-highway vehicles and does not have the fuel properties needed by the DPF-equipped Duramax diesel. 7 In addition: . Use the correct engine oil. . Do not add gasoline to diesel fuel. . Do not modify the induction or exhaust systems. See Fuel for Diesel Engines 0 45 and Engine Oil 0 91. Diesel Exhaust Fluid Diesel Exhaust Fluid (DEF) is used with diesel engines to reduce the amount of regulated emissions produced. The DEF system must be maintained for the vehicle to run properly. DEF is not a fuel additive. For refilling instructions, see Diesel Exhaust Fluid 0 37. DEF should not be mixed with or added to diesel fuel. DEF freezes when exposed to temperatures below −11 °C (12 ° F). Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 8 In Brief Locating Diesel Exhaust Fluid DEF can be purchased at a Chevrolet or GMC dealer. It can also be purchased at authorized vehicle and truck dealerships. Additionally, some diesel truck fueling stations or retailers may have DEF for purchase. For vehicles with an active OnStar® subscription, OnStar can help to locate a DEF retailer. See “Customer Assistance Offices” in the owner manual for phone numbers to assist you in contacting a GM dealer. See Recommended Fluids and Lubricants 0 126. As the DEF tank becomes low on fluid, warnings begin with approximately 1 600 km (1,000 mi) of remaining range. These warnings will increase as the tank becomes empty. Once the tank is empty, the vehicle speed will be limited. If there is an issue with the quality of the fluid or the exhaust fluid system, warnings will be displayed in the Driver Information Center (DIC). See Diesel Exhaust Fluid 0 37. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Instruments and Controls Instruments and Controls Warning Lights, Gauges, and Indicators Instrument Cluster . . . . . . . . . . . . . Fuel Gauge . . . . . . . . . . . . . . . . . . . . Engine Oil Pressure Gauge . . . . Malfunction Indicator Lamp (Check Engine Light) . . . . . . . . . Wait-to-Start Light . . . . . . . . . . . . . Diesel Exhaust Fluid (DEF) Warning Light . . . . . . . . . . . . . . . . Power Take-Off Light (Chassis Cab Only) . . . . . . . . . . . . . . . . . . . . 10 16 17 18 20 20 21 Information Displays Driver Information Center (DIC) . . . . . . . . . . . . . . . . . 21 Vehicle Personalization Vehicle Personalization (Pickup Models) . . . . . . . . . . . . . . . . . . . . . . 22 Vehicle Personalization (Van Models) . . . . . . . . . . . . . . . . . . . . . . 23 9 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 10 Instruments and Controls Warning Lights, Gauges, and Indicators Instrument Cluster English Base Level 4-Cylinder Pickup Shown, Metric Similar Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Instruments and Controls English Uplevel 4-Cylinder Pickup Shown, Metric Similar 11 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 12 Instruments and Controls English Base Level 8-Cylinder Pickup Shown, Metric Similar Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Instruments and Controls English Uplevel 8-Cylinder Pickup Shown, Metric Similar 13 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 14 Instruments and Controls English 8-Cylinder Denali Pickup Shown, Metric Similar Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Instruments and Controls English Van Shown, Metric Similar 15 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 16 Instruments and Controls See the owner’s manual for warning lights and gauges not listed in this supplement. Fuel Gauge English Base Level 4-Cylinder Pickup Shown, Uplevel Similar English 8-Cylinder Pickup Models Metric Base Level 4-Cylinder Pickup Shown, Uplevel Similar Metric Van Models Metric 8-Cylinder Pickup Models Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Instruments and Controls English Van Models When the ignition is on, the fuel gauge shows approximately how much fuel the vehicle has left in the tank. The gauge will first indicate E (Empty) before the vehicle is out of fuel, but the vehicle's fuel tank should be filled soon. An arrow on the fuel gauge indicates the side of the vehicle the fuel door is on. Listed are four situations customers may experience with the fuel gauge: . At the gas station, the fuel pump shuts off before the gauge reads F (Full). . It takes a little more or less fuel to fill up than the fuel gauge indicated. For example, the gauge may have indicated the tank was half full, but it actually took a little more or less than half the tank's capacity to fill the tank. . The gauge moves a little while turning a corner or speeding up. . The gauge does not go back to E (Empty) when the ignition is turned off. 17 Metric 8-Cylinder Pickup Models None of these indicate a problem with the fuel gauge. For information on how to fill the fuel tank, see Filling the Tank 0 56. Engine Oil Pressure Gauge 4-Cylinder Pickup Models See “Oil Pressure” under “Driver Information Center (DIC)” in the owner’s manual. English 8-Cylinder Pickup Models Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 18 Instruments and Controls Caution Metric Van Models Lack of proper engine oil maintenance can damage the engine. Driving with the engine oil low can also damage the engine. The repairs would not be covered by the vehicle warranty. Check the oil level as soon as possible. Add oil if required, but if the oil level is within the operating range and the oil pressure is still low, have the vehicle serviced. Always follow the maintenance schedule for changing engine oil. The engine oil pressure gauge reads in kPa (kilopascals) or psi (pounds per square inch) when the engine is running. Oil pressure may vary with engine speed, outside temperature, and oil viscosity. English Van Models If readings are outside the normal operating range, the low oil pressure message may display on the Driver Information Center (DIC), or for vehicles without a DIC the oil pressure light will come on. If the oil pressure message or light comes on, check the oil level immediately. Do not operate the engine with the oil pressure warning light on or an ENGINE OIL LOW ADD OIL message displayed. Malfunction Indicator Lamp (Check Engine Light) This light is part of the vehicle’s emission control on-board diagnostic system. If this light is on while the engine is running, a malfunction has been detected and the vehicle may require service. The light should come on to show that it is working when the ignition is on with the engine not running. See “Ignition Positions” in the owner’s manual. This light may also come on when the system has detected a problem with the Diesel Exhaust Fluid (DEF) management system. See Diesel Exhaust Fluid 0 37. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Instruments and Controls Caution Malfunctions are often indicated by the system before any problem is noticeable. Being aware of the light and seeking service promptly when it comes on may prevent damage. Caution If the vehicle is driven continually with this light on, the emission control system may not work as well, the fuel economy may be lower, and the vehicle may not run smoothly. This could lead to costly repairs that might not be covered by the vehicle warranty. Modifications to the engine, transmission, exhaust, intake, or fuel system, or the use of replacement tires that do not meet the original tire specifications, can cause this light to come on. This could lead to costly repairs not covered by the vehicle warranty. This could also affect the vehicle’s ability to pass an Emissions Inspection/ Maintenance test. See Accessories and Modifications 0 84. When the light is on, a malfunction has been detected. Diagnosis and service may be required. Poor fuel quality can cause inefficient engine operation and poor driveability, which may go away once the engine is warmed up. If this occurs, change the fuel brand. It may require at least one full tank of the proper fuel to turn the light off. See Fuel for Diesel Engines 0 45. 19 If the light remains on, see your dealer. Emissions Inspection and Maintenance Programs If the vehicle requires an Emissions Inspection/Maintenance test, the test equipment will likely connect to the vehicle's Data Link Connector (DLC). The DLC is under the instrument panel to the left of the steering wheel. Connecting devices that are not used to perform an Emissions Inspection/Maintenance test or to service the vehicle may affect vehicle operation. See “Add-On Electrical Equipment” in the owner’s manual. See your dealer if assistance is needed. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 20 Instruments and Controls The vehicle may not pass inspection if: . The light is on when the engine is running. . The light does not come on when the ignition is on with the engine not running. . Critical emission control systems have not been completely diagnosed. If this happens, the vehicle would not be ready for inspection and might require several days of routine driving before the system is ready for inspection. This can happen if the 12-volt battery has recently been replaced or run down, or if the vehicle has recently been serviced. See your dealer if the vehicle will not pass or cannot be made ready for the test. Wait-to-Start Light This light comes on briefly while starting the engine, as a check to show the light is working. If the wait-to-start light comes on, the glow plug system is required and operating. Wait until the light turns off before starting the engine. This light may not come on in warm temperatures. The fast warm-up glow plug system makes the wait-to-start light stay on for a shorter amount of time than most diesel engines. See Starting the Diesel Engine 0 24. Diesel Exhaust Fluid (DEF) Warning Light This light, a Driver Information Center (DIC) message, and a chime come on when there is an issue with the Diesel Exhaust Fluid. If the DEF level has not been corrected, the light will continue to flash when the vehicle is started. The vehicle's speed may also be limited. Also see Diesel Exhaust Fluid 0 37. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Instruments and Controls Power Take-Off Light (Chassis Cab Only) Information Displays Driver Information Center (DIC) The DIC is in the instrument cluster. The DIC comes on when the ignition is on. Chassis Cab The vehicle may have a Power Take-Off (PTO) light. Under normal operating conditions, the PTO light will remain on throughout the PTO operating cycle. If all conditions required to engage PTO have not been met when enabling PTO, the PTO light will turn on, then turn off after one second. See Power Take-Off (PTO) 0 66. A Duramax diesel vehicle may have the following additional DIC menu items: Exhaust Fluid Level : The Diesel Exhaust Fluid (DEF) level will be displayed as either OK, XX%, or LOW. When LOW appears on the display, add DEF as soon as possible. See Diesel Exhaust Fluid 0 37. Fuel Filter Life Remaining : This display shows an estimate of the fuel filter's remaining useful life. If 90% Fuel Filter Life Remaining is displayed, it means 90% of the current fuel filter life remains. The fuel filter life system will alert when to change the fuel filter on a schedule consistent with your driving conditions. 21 When the remaining fuel filter life is low, the CHANGE FUEL FILTER message will appear on the display. Change the fuel filter as soon as possible. Fuel Filter Life Reset : Reset the Fuel Filter Life Remaining display after each fuel filter change. It will not reset itself. Also, be careful not to reset the display at any time other than when the fuel filter has just been changed because it cannot be reset accurately until the next fuel filter change. The fuel filter life will change to 100% when the system has been reset. To reset the system, press and hold the set/reset button, or the trip odometer reset stem if there are no DIC buttons, for two seconds while Fuel Filter Life Remaining is displayed on the DIC. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 22 Instruments and Controls Vehicle Personalization 3. Turn the MENU knob to scroll to SETTINGS, then press the MENU knob. Vehicle Personalization (Pickup Models) 4. Turn the MENU knob to scroll to Vehicle, then press the MENU knob. Use the audio system controls to access the personalization menus for customizing vehicle features. 5. Turn the MENU knob to scroll to the desired menu, then press the MENU knob. The following features may be available on some vehicles with a diesel engine. See “Vehicle Personalization” in the owner’s manual for additional vehicle personalizations. If equipped, these features may be selected using the infotainment display. System Controls 1. Turn the ignition on without the engine running and place the vehicle in P (Park). To avoid excessive drain on the battery, turn the headlamps off. 2. Press the MENU knob on the radio. Vehicle Select and the following may display: . Climate and Air Quality . Power Take-Off (PTO) Elevated Idle This allows the feature to be turned on and off. See “Elevated Idle” in Starting the Diesel Engine 0 24. Select Off or On. Power Take-Off (PTO) (If Equipped) There may be additional features that can be customized for the PTO. See Power Take-Off (PTO) 0 66. See your dealer to enable these features. Feature Settings Menu Items Press the MENU knob to select the desired setting. . Standby Speed . Set 1 Speed Climate and Air Quality . Set 2 Speed Select and the following may display: . Elevated Idle . Tap Step Speed . Shutdown Time Turn the MENU knob to scroll to one of the following menu selections: Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Instruments and Controls PTO STANDBY SPEED PTO TAP STEP SPEED This feature allows for modifying the PTO Standby Speed. This feature is available if the vehicle is configured for Stationary Variable or Mobile PTO, and allows the selection of the PTO tap step speed. Turn the MENU knob to the desired setting. Press the MENU knob to select the desired setting. PTO SET 1 SPEED This feature is available if the vehicle is configured for Stationary Preset PTO, and allows the selection of the PTO set 1 speed. Turn the MENU knob to the desired PTO Tap Step Speed setting. Press the MENU knob to select the desired setting. PTO SHUTDOWN TIME Turn the MENU knob to the desired PTO Standby Set 1 setting. Press the MENU knob to select the desired setting. This feature is available if the vehicle is configured for Stationary Preset or Stationary Variable PTO, and allows the selection of the PTO shutdown time. PTO SET 2 SPEED Turn the MENU knob to the desired PTO Shutdown Time setting. Press the MENU knob to select the desired setting. This feature is available if the vehicle is configured for Stationary Preset PTO, and allows the selection of the PTO set 2 speed. Turn the MENU knob to the desired PTO Standby Set 2 setting. Press the MENU knob to select the desired setting. Vehicle Personalization (Van Models) This vehicle may have customization capabilities that allow you to program certain features to one preferred setting. Customization 23 features can only be programmed to one setting on the vehicle and cannot be programmed to a preferred setting for two different drivers. A Duramax diesel vehicle may have the following additional vehicle personalization items: Feature Settings Menu Items The following are customization features that allow you to program settings to the vehicle: ELEVATED IDLE This feature allows you to turn on or off Elevated Idle. Press U until ELEVATED IDLE appears on the DIC display. Press V once to access the settings for this feature. Then press U to scroll through OFF, ON, or NO CHANGE. To select a setting, press V while the desired setting is displayed on the DIC. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 24 Driving and Operating Driving and Operating Starting and Operating Starting the Diesel Engine . . . . . 24 Winter Cover . . . . . . . . . . . . . . . . . . . 27 Engine Heater . . . . . . . . . . . . . . . . . 31 Fuel Operated Heater (FOH) (Van Models Only) . . . . . . . . . . . 33 Parking over Things That Burn . . . . . . . . . . . . . . . . . . . . 34 Diesel Particulate Filter Diesel Particulate Filter . . . . . . . . 34 Diesel Exhaust Fluid Diesel Exhaust Fluid . . . . . . . . . . . 37 Brakes Exhaust Brake . . . . . . . . . . . . . . . . . 44 Fuel Fuel for Diesel Engines . . . . . . . . 45 What Fuel to Use in the U.S. . . . . . . . . . . . . . . . . . . . . . . 46 What Fuel to Use in Canada . . . 47 Biodiesel . . . . . . . . . . . . . . . . . . . . . . . 47 Cold Weather Operation . . . . . . . 49 Water in Fuel . . . . . . . . . . . . . . . . . . 50 Running Out of Fuel . . . . . . . . . . . 53 Fuel Filter Replacement . . . . . . . 54 Filling the Tank . . . . . . . . . . . . . . . . 56 Filling a Portable Fuel Container . . . . . . . . . . . . . . . . . . . . . 58 Trailer Towing Trailer Towing . . . . . . . . . . . . . . . . . . 58 Conversions and Add-Ons Starting and Operating Starting the Diesel Engine The diesel engine starts differently than a gasoline engine. Power Take-Off (PTO) . . . . . . . . . 66 Caution If the steering wheel is turned until it reaches the end of its travel, and is held in that position while starting the vehicle, damage may occur to the hydraulic power steering system and there may be loss of power steering assist. Move the shift lever to P (Park) or N (Neutral). To restart the engine when the vehicle is already moving, use N (Neutral) only. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating Caution Do not try to shift to P (Park) if the vehicle is moving. If you do, you could damage the transmission. Shift to P (Park) only when the vehicle is stopped. Starting the Engine 1. Turn the ignition key to ON/RUN. Observe the wait-to-start light. See Wait-to-Start Light 0 20. This light may not come on if the engine is warm. 2. If the wait-to-start light is on, wait until this light goes off. Turn the ignition key to START, then release the ignition key. The engine will continue to crank until the engine starts. The engine has a fast warm-up glow plug system. The wait-to-start light will illuminate for a much shorter time than most diesel engines, due to the rapid heating of the glow plug system. Caution If the wait-to-start light stays on after starting the vehicle, the vehicle may not run properly. Have the vehicle serviced right away. 3. If the engine does not start after 15 seconds of cranking, turn the ignition switch to LOCK/OFF. Wait one minute for the cranking motor to cool, then try the same steps again. If you are trying to start the engine after you have run out of fuel, follow the steps in Running Out of Fuel 0 53. When the engine is cold, let it run for a few minutes before driving. This lets oil pressure build up. The engine will sound louder when it is cold. 25 For turbo protection, engine power at speeds above idle may be limited if the engine is cold. This protection can last up to a maximum of 40 seconds at extreme cold coolant and ambient temperatures. Cold Weather Starting Use the recommended engine oil when the outside temperature drops below freezing. See Engine Oil 0 91. When the outside temperature drops below –18 °C (0 °F), use of the engine coolant heater is recommended. If you experience longer cranking times, notice an unusual amount of exhaust smoke, or are at higher elevations (over 2 135 m or 7,000 ft), you may use the engine coolant heater. See Engine Heater 0 31. See Fuel for Diesel Engines 0 45 for information on what fuel to use in cold weather. If the Diesel Engine Will Not Start If the vehicle runs out of fuel, see Running Out of Fuel 0 53. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 26 Driving and Operating If the vehicle is not out of fuel, and the engine will not start: Turn the ignition key to ON/RUN. After the wait-to-start light goes off, turn the ignition key to START. If the light does not go off, wait a few seconds, then try starting the engine again. See your dealer as soon as you can for a starting system check. If the light comes on and then goes off and you know the batteries are charged, but the engine still will not start, the vehicle needs service. If the light does not come on when the engine is cold, the vehicle needs service. If the batteries do not have enough charge to start the engine, see “Battery” in the owner manual. Check that the correct engine oil has been used and changed at appropriate intervals. If the wrong oil is used, the engine may be harder to start. Be sure you are using the proper fuel for existing weather conditions. See Fuel for Diesel Engines 0 45. and engine warmup. These speeds can range from approximately 600 to 1000 rpm. If the engine starts, runs a short time, then stops, the vehicle needs service. Elevated Idle { Warning Do not use gasoline or starting aids, such as ether, in the air intake. They could damage the engine, which may not be covered by the vehicle warranty. They could also cause a fire, which could cause serious personal injury. Engine Idle Variations Under certain conditions the engine idle speed can vary or be elevated. Change in idle speed is normal and does not indicate a problem. Normal conditions that can raise idle speed are low voltage, DPF regeneration, air conditioning compressor loads, The engine has a cold temperature high idle feature which elevates the engine idle speed from base idle to 1050 to 1100 rpm for pickup models or 1200 rpm for van models when outside temperatures are below 0 °C (32 °F), and the engine coolant temperature is below 65 °C (150 °F). This feature enhances heater performance by raising the engine coolant temperature faster. To turn this feature on or off on pickup models, see Vehicle Personalization (Pickup Models) 0 22 or Vehicle Personalization (Van Models) 0 23. On van models, this feature can be turned on and off using the DIC buttons. When the engine is started, it will slowly ramp up to the high idle speed after a delay of a few seconds up to approximately Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating 27 two minutes. For this method to work properly there must be no throttle or brake pedal faults. delay, if the conditions for engine coolant temperature and air intake temperature are still met. . The cruise control Cancel switch is pressed. . The brake pedal is pressed. The engine idle speed will return to normal once the following conditions are met: . Engine coolant temperature reaches 65 °C (150 °F). . Air intake temperature reaches 0 °C (32 °F). Fast Idle Control (Vans and 8-Cylinder Pickups Only) . The transmission is shifted out of P (Park) or N (Neutral). The vehicle may have this system which can be used to increase the engine idle speed. . The parking brake is released. . The vehicle speed is not 0 km/h (0 mph). The high idle speed will be temporarily interrupted and the engine speed will return to normal if any of the following conditions occur: . The brake pedal is applied. . The accelerator pedal is pressed. . The transmission is shifted out of P (Park) or N (Neutral). . Vehicle speed is detected. Once these inputs are removed, the engine idle speed will slowly ramp back up to high idle after the normal Fast Idle control will be enabled when the following conditions are met: . The parking brake is set. On vans, when fast idle is active, a FAST IDLE ON message will be displayed in the DIC. . The transmission is in P (Park) or N (Neutral). Winter Cover . The vehicle speed is about 0 km/h (0 mph). Do not use a winter cover on 4-cylinder pickups. . The cruise control Set switch is pressed and released for Preset Fast Idle Speed (1200 rpm). Vans and 8-Cylinder Pickups Only Fast Idle control will be disabled when one or more of the following conditions occur: . The cruise control Set switch is pressed and released. See “Cruise Control” in the owner manual. 4-Cylinder Pickups If equipped, the winter cover can be used to enhance heater performance in extremely cold conditions below −18 °C (0 °F). The winter cover installs over the grille and restricts airflow to the engine compartment. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 28 Driving and Operating For vehicles that did not come with a winter cover, a GM winter cover can be purchased. See your dealer for additional information. . Do not use the winter cover if a snow plow is mounted on the truck. When the winter cover is in use, the heater, ventilation, and air conditioning AUTO mode may not function properly. Use the manual settings for comfort. Usage Guidelines The winter cover should only be used while operating the vehicle in extremely cold temperatures or in heavy snow for extended periods. In these temperatures, the vehicle does not need a large amount of air to properly cool the engine. When more airflow is required to cool the vehicle, the winter cover should not be used. The following usage guidelines will allow adequate airflow for proper radiator and air cooler performance: . Do not use the winter cover if towing a trailer. The vehicle may overheat if the radiator is covered while towing. . Keep the underside of the winter cover as clean as possible. Remove monthly or as necessary and clean away dust and debris. . Use only a mild soap to clean. Do not use harsh soap, strong detergents, or vinyl protectant/ sealant type products as they may damage the special finish. Allow the winter cover to dry completely before reinstalling. Installation Instructions . Do not cover the opening in the front bumper. . Do not modify the cover. The winter cover does not cover some sections of the front of the vehicle to provide enough airflow. . When the winter cover is used, the outside air temperature display may not function properly. When first trying to fit the cover, it may appear to be undersized but will stretch during installation to ensure a tight fit. The initial installation of the cover is best performed when the winter cover is warm. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating 29 Installation (Chevrolet Pickup) 1. The white label must be at the top and back of the cover. 2. Starting in the middle, attach fastening points as illustrated. 3. To remove, reverse the steps listed previously. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 30 Driving and Operating Installation (GMC Pickup) 1. The white label must be at the top and back of the cover. 2. Starting in the middle, attach fastening points as illustrated. 3. To remove, reverse the steps listed previously. Installation (Van Models) 1. Open the hood and secure it with the prop rod. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating 31 5. To remove the winter cover, reverse the steps listed previously. Engine Heater { Warning Do not plug in the engine block heater while the vehicle is parked in a garage or under a carport. Property damage or personal injury may result. Always park the vehicle in a clear open area away from buildings or structures. If equipped, the engine heater can provide easier starting in cold weather conditions at or below −18 °C (0 °F). The engine heater should be plugged in at least four hours before starting. To Use the Engine Heater 2. Hook the five J-clips to the bottom edge of the grille. 3. Hook the top center J-clip by the hood latch. 4. Attach the metal hooks, one each at the top corners. 1. Turn off the engine. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 32 Driving and Operating your dealer for a replacement. Inspect the cord for damage yearly. 4. Plug it into a normal, grounded 110-volt AC outlet. { Warning 8-Cylinder Pickups 4-Cylinder Vans 2. Open the hood and unwrap the electrical cord. For 8-cylinder pickups, the cord is in the engine compartment, on the driver side near the battery. For 4-cylinder pickups, the cord is in the engine compartment, on the driver side behind the battery, and on the passenger side for 4-cylinder vans. 4-Cylinder Pickups 3. Clean and dry the heater cord and connector ends. Check the heater cord for damage. If it is damaged, do not use it. See Improper use of the heater cord or an extension cord can damage the cord and may result in overheating and fire. . Plug the cord into a three-prong electrical utility receptacle that is protected by a ground fault detection function. An ungrounded outlet could cause an electric shock. . Use a weatherproof, heavy-duty, 15 amp-rated extension cord if needed. Failure to use the recommended extension cord in good operating condition, or using a damaged heater or (Continued) Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating Warning (Continued) extension cord, could make it overheat and cause a fire, property damage, electric shock, and injury. . Do not operate the vehicle with the heater cord permanently attached to the vehicle. Possible heater cord and thermostat damage could occur. . While in use, do not let the heater cord touch vehicle parts or sharp edges. Never close the hood on the heater cord. . Before starting the vehicle, unplug the cord, reattach the cover to the plug, and securely fasten the cord. Keep the cord away from any moving parts. 5. Before starting the engine, be sure to unplug and store the cord as it was before to keep it away from moving engine parts and prevent damage. The length of time the heater should remain plugged in depends on the outside temperature. You may wish to use the coolant heater to improve ease of starting at temperatures between −18 °C (0 °F) and −29 °C (−20 °F). Keep the coolant heater plugged in for a minimum of four hours. At temperatures below −29 °C (−20 °F), the coolant heater should remain plugged in for at least eight hours. Be sure to store the cord before starting the engine. See Fuel for Diesel Engines 0 45 for information on what fuel to use in cold weather. Caution Do not use the engine heater continuously. This could damage the engine heater and may cause a fire. Always unplug the engine heater after use. 33 Fuel Operated Heater (FOH) (Van Models Only) If equipped, the FOH will enhance heater performance and will reduce the amount of time it takes to warm the inside of the vehicle in cold conditions below or equal to 4 °C (39 °F). The FOH is installed on the frame rail on the driver side of the vehicle and uses diesel fuel to heat the engine coolant, which warms up the passenger cabin air. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 34 Driving and Operating The FOH will turn on if all of the following conditions exist: . Outside air temperature is below or equal to 4 °C (39 °F). . Fuel level is greater or equal to 12.5% of the total fuel tank volume. . The engine is running. . Coolant temperature is less than 70 °C (158 °F). Parking over Things That Burn { Warning Things that can burn could touch hot exhaust parts under the vehicle and ignite. Do not park over papers, leaves, dry grass, or other things that can burn. Diesel Particulate Filter The vehicle has a Diesel Particulate Filter (DPF) as part of the exhaust system to reduce vehicle emissions. The DPF requires a unique exhaust tailpipe with an exhaust cooler. The exhaust cooler mixes air with the exhaust to lower the temperature before it leaves the tailpipe. The DPF, the tailpipe, or other exhaust system components must not be altered. Inspect regularly and clean any mud or dirt from the exhaust cooler, especially where the exhaust cooler connects to the tailpipe and the openings where fresh air enters the cooler. The DPF will clean itself as part of normal operation. Several factors including fuel consumed, hours of engine operation, and miles driven are monitored by the Engine Control Module (ECM). The self-cleaning occurs approximately once per tank of fuel. Caution Permanent damage can occur to the DPF or related components if the required Ultra Low Sulfur Diesel (15 ppm sulfur maximum) or low ash CJ-4 engine oil is not used. This damage would not be covered by the vehicle warranty. Under certain driving conditions, such as stop-and-go traffic, the filter cannot clean itself. A message comes on when the DPF is dirty and needs to perform a self cleaning. For the filter to clean itself, the vehicle must be driven above 50 km/h (30 mph) until the message goes off. This will take about 30 minutes. { Warning During DPF self cleaning or during extended idling in P (Park), the exhaust system and exhaust (Continued) Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating Warning (Continued) Caution (Continued) gases are very hot. Things that burn could touch hot exhaust parts under the vehicle and ignite. You or others could be burned. Do not park, or idle for an extended period of time, near or over papers, leaves, dry grass, or other things that can burn. Keep the exhaust area clear of material that could ignite or burn. See Parking over Things That Burn 0 34. action. Continued idling with the warning light/message on could cause irreversible damage to the DPF requiring repair and possible replacement that might not be covered by the vehicle warranty. Caution Extended idle should be avoided because the DPF system is not capable of self cleaning at idle. During extended idle operation, monitor the instrument cluster telltale lights and Driver Information Center for messages and take appropriate indicated (Continued) You will also notice a change in the exhaust sound and engine idle speed. This is normal. If you continue to drive with the DPF warning message on and the exhaust filter is not cleaned as required, the malfunction indicator lamp and the ENGINE POWER IS REDUCED message will come on and dealer service is necessary. See Malfunction Indicator Lamp (Check Engine Light) 0 18. Vehicles with the DPF have specific fuel and engine oil requirements. See What Fuel to Use in the U.S. 0 46 and Engine Oil 0 91. 35 Extended idling in P (Park) can cause exhaust parts and gases to become very hot. Keep the exhaust area clear of material that could ignite or burn. See Parking over Things That Burn 0 34. If equipped with Power Take-Off (PTO), monitor the instrument cluster for lights related to the DPF. See Accessories and Modifications 0 84 for important information if you are considering adding accessories or modifying the vehicle. Manual Regeneration of Diesel Particulate Filter This feature is only available on Fleet and Commercial vehicles. To verify that the vehicle has this feature, refer to the Vehicle Service Parts Identification label (SPID) for RPO code FPF or see www.gmupfitter.com to contact the GM Upfitter Integration Group for assistance. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 36 Driving and Operating If equipped, this feature allows for manual cleaning/regeneration of the Diesel Particulate Filter (DPF) when it is unable to clean itself. It may be necessary to perform a manual regeneration if driving conditions — such as extended slow speed, stop-and-go traffic, extended idles, short drive cycles, or stationary PTO operation — prevent DPF self-cleaning. Manual regeneration can only be used when the DPF has become at least 90% full. At 100% full, it will attempt to automatically self-clean if proper driving conditions are met. The DPF will clean itself if the vehicle can be driven above 50 km/h (30 mph) for about 30 minutes. A Driver Information Center (DIC) message displays when manual regeneration is possible. Scroll through the DIC pages to find the Exhaust Cleaning menu. Depending on whether the vehicle has a base or uplevel cluster, it may be under the Settings menu. If the vehicle cannot be stopped when the DIC message first indicates cleaning is available, automatic self-cleaning may have begun. If conditions cannot be met for self-cleaning to complete, and manual regeneration is selected, it may take up to four minutes for the system to switch to manual regeneration. When the switch occurs, a DIC message prompts to start the cleaning process. Warning: The exhaust system and exhaust gases get very hot during a manual regeneration. Things that burn could touch hot exhaust parts under the vehicle and may catch fire. You or others could be burned. Do not leave the vehicle unattended during a manual regeneration. Before starting the manual regeneration, make sure all of the following safety conditions are met: . The vehicle is parked on level ground, away from any flammable materials. . The vehicle is parked outdoors, away from any walls or buildings. . The vehicle is at least 3 m (10 ft) from any obstructions or materials that may combust or melt. . The shift lever is in P (Park). . The fuel tank is at least one-eighth full . All fluids are at the proper level. . No diagnostic trouble codes have been set, and the malfunction indicator lamp is not on. . The engine coolant temperature is above 71 °C (160 °F). After making sure all of the safety conditions have been met, press the trip odometer reset stem or < symbol for the check button> on the steering wheel control for at least one second to select Start on the infotainment display. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating Follow the instructions in the DIC messages. Touch ACCEPT to acknowledge that all of these safety conditions have been met and to activate regeneration. When manual regeneration begins, the engine speed increases, the engine cooling fan sound increases, and a DIC message indicates that cleaning is in progress. If the infotainment display returns to the previous screen, then one or more of the necessary operating conditions has not been met. If you cannot determine which condition has not been met, see www.gmupfitter.com to contact the GM Upfitter Integration Group for assistance. A DIC message will display when cleaning has completed. The message will remain as long as cleaning is not necessary. Cleaning could take up to 30 minutes. Upon completion, the engine will return to normal idle, but exhaust components will remain hot for several minutes. Do not move the vehicle until the exhaust has had time to cool. Manual regeneration can be canceled at any time by pressing the brake pedal or turning the engine off. Unusual noises may be heard if regeneration is interrupted. Continue to follow the instructions in the DIC messages. Hold the Exhaust Brake switch on the instrument panel below the climate controls for more than three seconds, and then release it, to begin the regeneration process. If the EXHAUST BRAKE ON message displays, then the switch was released too soon. Press it again to turn off the exhaust brake, then try again when the DIC message prompts. 37 Diesel Exhaust Fluid { Warning Diesel Exhaust Fluid (DEF) is corrosive. Do not allow it to come in contact with your skin, eyes, or the finished surfaces of the vehicle. If exposed, it may cause skin and eye irritation. Wear skin and eye protection when handling. Inhalation may cause irritation to the upper respiratory tract. For more safety and storage information, see the label of the Diesel Exhaust Fluid container. Diesel Exhaust Fluid (DEF) is used with diesel engines to reduce the amount of regulated emissions produced. The fluid level in the DEF tank must be maintained for the vehicle to run properly. DEF is not a fuel additive. DEF should not be mixed with or added to diesel fuel. DEF freezes when exposed to Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 38 Driving and Operating temperatures below −11 °C (12 ° F).For DEF tank capacity see Capacities and Specifications 0 131. Locating Diesel Exhaust Fluid DEF can be purchased at a Chevrolet or GMC dealer. It can also be purchased at authorized vehicle and truck dealerships. Additionally, some diesel truck fueling stations or retailers may have DEF for purchase. For vehicles with an active OnStar subscription, OnStar can help to locate a DEF retailer. See “Customer Assistance Offices” in the owner manual for phone numbers to assist in contacting a GM dealer. See Recommended Fluids and Lubricants 0 126. Filling the DEF Tank Caution Use only DEF that is GM approved, or fluid containing the API certified or ISO 22241 label. The use of other fluids could damage the system, requiring costly repairs that will not be covered by the vehicle warranty. When adding fluid, it is recommended to fill the DEF tank. For DEF tank capacity see Capacities and Specifications 0 131. Do not overfill the DEF tank. When fluid reaches the top of the fill pipe, stop filling. If you spill DEF on the vehicle while filling the tank, rinse the area with water and wipe the surface with a damp cloth. DEF Fill–Van Model Shown, 4-Cylinder Pickups Similar For vans and 4-cylinder pickups, the DEF fill is behind the fuel fill door. The DEF cap is blue, and the diesel cap is green. The fill tube location for chassis cab and cutaway vans finished by an upfitter will vary. Check the upfitter manual. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating As the DEF level drops, warnings will automatically be displayed in the DIC. DEF level status is available on the DIC under the vehicle Information button. See “Exhaust Fluid Level” in Driver Information Center (DIC) 0 21. DEF Fill–8-Cylinder Pickups For 8-cylinder pickups, the DEF fill is under the hood, on the passenger side, at the back of the engine compartment. The DEF cap is blue. In certain cold conditions, it is possible to find some frozen DEF in the DEF fill pipe opening. If this condition prevents the filling of a DEF tank, place the vehicle in a warm garage overnight. Exhaust Fluid Low A full DEF tank will last for several thousand kilometers (miles), depending on vehicle usage. To avoid vehicle speed limitations, the DEF tank should be refilled at the first opportunity after a low warning indication. If DEF is added before the EXHAUST FLUID EMPTY REFILL NOW message appears, it may take several km/mi for the DIC message to update. If the vehicle speed has been limited and DEF has been added, it may take up to 30 seconds after engine start with the vehicle stopped for the EXHAUST FLUID EMPTY REFILL NOW message to clear. If the vehicle is driven prior to the DIC message clearing, the vehicle speed will still be limited. If the DIC message clears while driving, the speed limitation will be removed gradually. 39 If DEF is added under freezing conditions, additional time may be required to remove speed limitations and may require less fluid to fill the DEF tank. The following actions describe strategies required by the U.S. Environmental Protection Agency (EPA) and the California Air Resource Board (CARB). The DEF messages relate to these strategies. The EXHAUST FLUID RANGE message first displays at approximately 1 600 km (1,000 mi). This message appears again at approximately 500 km (300 mi) of remaining range before the exhaust fluid tank becomes empty. Based on driving conditions the amount needed to fill the tank will vary. See the following list for approximate volume required to fill the DEF tank when 1 600 km (1,000 mi) warning appears: . Colorado/Canyon - 4-cylinder 16.5 L (4.5 gal) Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 40 Driving and Operating . Silverado/Sierra/Sierra Denali 8-cylinder - 14.5 L (3.8 gal) . Express/Savana - 4-cylinder 14.5 L (3.8 gal) Below 500 km (300 mi) of range remaining, these messages will appear every time the vehicle is started. If these warnings are ignored and the DEF tank becomes empty, the DIC message displays: . For vans and 4-cylinder pickups, EXHAUST FLUID EMPTY REFILL NOW - 644 KM (400 MI) UNTIL 105 KM/H (65 MPH) MAX SPEED. . For 8-cylinder pickups, EXHAUST FLUID EMPTY REFILL NOW - 805 KM (500 MI) UNTIL 105 KM/H (65 MPH) MAX SPEED. . For emergency pickups with RPO ANM, EXHAUST FLUID EMPTY REFILL NOW 65 534 KM (40,721 MI) UNTIL 158 KM/H (98 MPH) MAX SPEED. The displayed mileage will decrease as driving continues. A warning light also comes on. When the mileage countdown is zero, the DIC message EXHAUST FLUID EMPTY REFILL NOW TRANSITIONING TO 105 KM/H (65 MPH) MAX SPEED displays. A warning light and a chime also come on. Vehicle speed will be reduced to a maximum speed limit of 105 km/h (65 mph). After the transition to 105 km/h (65 mph) is complete, the DIC message displays: . EXHAUST FLUID EMPTY REFILL NOW - SPEED LIMITED TO 105 KM/H (65 MPH) – 120 KM (75 MI) UNTIL 89 KM/H (55 MPH) MAX SPEED. . For emergency pickups with RPO ANM, EXHAUST FLUID EMPTY REFILL NOW - SPEED LIMITED TO 158 KM/H (98 MPH) MAX SPEED. The displayed mileage will decrease as driving continues. A warning light and a chime also come on. When the mileage countdown is zero, the DIC message EXHAUST FLUID EMPTY REFILL NOW TRANSITIONING TO 89 KM/H (55 MPH) MAX SPEED displays. A flashing warning light and a chime also come on. Vehicle speed will be reduced to a maximum speed limit of 89 km/h (55 mph). After the transition to 89 km/h (55 mph) is complete, the DIC message EXHAUST FLUID EMPTY REFILL NOW - SPEED LIMITED TO 89 KM/H (55 MPH) – 120 KM (75 MI) UNTIL 8 KM/H (5 MPH) MAX SPEED displays. The displayed mileage will decrease as driving continues. A flashing warning light and a chime also come on. When the mileage countdown is zero, the DIC message EXHAUST FLUID EMPTY REFILL NOW TRANSITIONING TO 8 KM/H (5 MPH) MAX SPEED displays. A flashing warning light and a chime also come on. Vehicle speed will be reduced to a maximum speed limit of 8 km/h (5 mph). Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating After the transition to 8 km/h (5 mph) is complete, the DIC message EXHAUST FLUID EMPTY REFILL NOW - SPEED LIMITED TO 8 KM/H (5 MPH) displays. A flashing warning light and a chime also come on. It is recommended to fill the DEF tank. At least 7.6 L (2 gal) of DEF need to be added to release the vehicle from the speed limitation. See Capacities and Specifications 0 131, Diesel Exhaust Fluid (DEF) Warning Light 0 20, and Recommended Fluids and Lubricants 0 126. Exhaust Fluid Quality Poor Use only DEF that is GM approved, or fluid containing the API certified or ISO 22241 label. DEF has an expiration date. If the system detects poor quality, or contaminated or diluted DEF, the DIC message displays: . . EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW – 160 KM (99 MI) UNTIL 105 KM/H (65 MPH) MAX SPEED. For emergency pickups with RPO ANM, EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW – 65 534 KM (40,721 MI) UNTIL 158 KM/H (98 MPH) MAX SPEED. The displayed mileage will decrease as driving continues. A warning light also comes on. Adding fresh DEF to the system may resolve the problem, depending on several factors. If the DIC message persists, see your dealer or additional DIC messages may display. When the mileage countdown is zero, a DIC message EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW TRANSITIONING TO 105 KM/H (65 MPH) MAX SPEED displays. A warning light and a chime also 41 come on. Vehicle speed will be reduced to a maximum speed limit of 105 km/h (65 mph). After the transition to 105 km/h (65 mph) is complete, the DIC message displays: . EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW - SPEED LIMITED TO 105 KM/H (65 MPH) – 120 KM (75 MI) UNTIL 89 KM/H (55 MPH) MAX SPEED. . For emergency pickups with RPO ANM, EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW SPEED LIMITED TO 158 KM/H (98 MPH) MAX SPEED. The displayed mileage will decrease as driving continues. A warning light and a chime also come on. When the mileage countdown is zero, the DIC message EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW TRANSITIONING TO 89 KM/H (55 MPH) MAX SPEED displays. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 42 Driving and Operating A flashing warning light and a chime also come on. Vehicle speed will be reduced to a maximum speed limit of 89 km/h (55 mph). SPEED LIMITED TO 8 KM/H (5 MPH) displays. A flashing warning light and a chime also come on. After the transition to 89 km/h (55 mph) is complete, a DIC message EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW - SPEED LIMITED TO 89 KM/H (55 MPH) – 120 KM (75 MI) UNTIL 8 KM/H (5 MPH) MAX SPEED displays. The displayed mileage will decrease as driving continues. A flashing warning light and a chime also come on. Service Exhaust Fluid System When the mileage countdown is zero, a DIC message EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW TRANSITIONING TO 8 KM/H (5 MPH) MAX SPEED displays. A flashing warning light and a chime also come on. Vehicle speed will be reduced to a maximum speed limit of 8 km/h (5 mph). After the transition to 8 km/h (5 mph) is complete, a DIC message EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW - If a problem occurs with the DEF system, the DIC message displays: . SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW – 160 KM (99 MI) UNTIL 105 KM/H (65 MPH) MAX SPEED. . For emergency pickups with RPO ANM, SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW – 65 534 KM (40,721 MI) UNTIL 158 KM/H (98 MPH) MAX SPEED. The displayed mileage will decrease as driving continues. A warning light also comes on. In some cases this message will clear itself, indicating that the DEF system was able to correct the condition. If the DIC message persists, see your dealer or additional DIC messages may display. When the mileage countdown is zero, the DIC message SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW TRANSITIONING TO 105 KM/H (65 MPH) MAX SPEED displays. A warning light and a chime also come on. Vehicle speed will be reduced to a maximum speed limit of 105 km/h (65 mph). After the transition to 105 km/h (65 mph) is complete, a DIC message displays: . SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW - SPEED LIMITED TO 105 KM/H (65 MPH) – 120 KM (75 MI) UNTIL 89 KM/H (55 MPH) MAX SPEED. . For emergency pickups with RPO ANM, SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW SPEED LIMITED TO 65 534 KM (40,721 MI) UNTIL 158 KM/H (98 MPH) MAX SPEED. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating The displayed mileage will decrease as driving continues. A warning light and a chime also come on. When the mileage countdown is zero, the DIC message SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW TRANSITIONING TO 89 KM/H (55 MPH) MAX SPEED displays. A flashing warning light and a chime also come on. Vehicle speed will be reduced down to a maximum speed limit of 89 km/h (55 mph). After the transition to 89 km/h (55 mph) is complete, the DIC message SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW - SPEED LIMITED TO 89 KM/H (55 MPH) – 120 KM (75 MI) UNTIL 8 KM/H (5 MPH) MAX SPEED displays. The displayed mileage will decrease as driving continues. A flashing warning light and a chime also come on. When the mileage countdown is zero, the DIC message SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW TRANSITIONING TO 8 KM/H (5 MPH) MAX SPEED displays. A flashing warning light and a chime also come on. Vehicle speed will be reduced to a maximum speed limit of 8 km/h (5 mph). After the transition to 8 km/h (5 mph) is complete, the DIC message SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW - SPEED LIMITED TO 8 KM/H (5 MPH) displays. A flashing warning light and a chime also come on. Service Emission System These restrictions are not applicable to emergency pickups with RPO ANM. If a problem occurs with the vehicle emission system, the DIC message SERVICE EMISSION SYSTEM SEE OWNERS MANUAL NOW – 282 KM (175 MI) UNTIL 105 KM/H (65 MPH) MAX SPEED displays. The displayed mileage will decrease as driving continues. In some cases this message will clear itself, indicating that the emission system was able to correct the condition. 43 If the DIC message persists, see your dealer or additional DIC messages may display. When the mileage countdown is zero, the DIC message SERVICE EMISSION SYSTEM - SEE OWNERS MANUAL NOW TRANSITIONING TO 105 KM/H (65 MPH) MAX SPEED displays. A chime also comes on. Vehicle speed will be reduced to a maximum speed limit of 105 km/h (65 mph). After the transition to 105 km/h (65 mph) is complete, the DIC message SERVICE EMISSION SYSTEM - SEE OWNERS MANUAL NOW - SPEED LIMITED TO 105 KM/H (65 MPH) – 120 KM (75 MI) UNTIL 89 KM/H (55 MPH) MAX SPEED displays. The displayed mileage will decrease as driving continues. A chime also comes on. When the mileage countdown is zero, the DIC message SERVICE EMISSION SYSTEM - SEE OWNERS MANUAL NOW TRANSITIONING TO 89 KM/H Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 44 Driving and Operating (55 MPH) MAX SPEED displays. A chime also comes on. Vehicle speed will be reduced to a maximum speed limit of 89 km/h (55 mph). After the transition to 89 km/h (55 mph) is complete, the DIC message SERVICE EMISSION SYSTEM - SEE OWNERS MANUAL NOW - SPEED LIMITED TO 89 KM/H (55 MPH) displays. A chime also comes on. Brakes Exhaust Brake The exhaust brake can be used to enhance the vehicle brake system and reduce brake lining wear. Downshifts may be automatically selected to increase engine speed, which increases the effectiveness of the exhaust brake. The number of downshifts selected is determined by the length of time the brakes are applied and the rate the vehicle is slowing. The system delivers the correct amount of braking to assist in vehicle control. The heavier the vehicle load, the more active the engine exhaust brake will be. Use of the exhaust brake will help maintain vehicle speed when used with cruise control. See “Cruise Control” in the owner manual. Automatic downshifts will not occur if the vehicle is in Range Selection Mode. See “Manual Mode” in the owner manual. The exhaust brake only activates when the transmission torque converter is locked. This can vary based on vehicle speed, gear, and load. To activate the system, press the switch on the center stack. 8-Cylinder Pickups For 8-cylinder pickups, use the exhaust brake switch. A light in the switch will come on when the exhaust brake is activated. The switch must be pressed at each vehicle start for the system to be active. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating 45 The Driver Information Center (DIC) displays the message EXHAUST BRAKE ON for approximately three seconds, then clears. Fuel To turn the brake off, press the exhaust brake switch a second time. The DIC displays the message EXHAUST BRAKE OFF for approximately three seconds, then clears. The selection of a high quality fuel is important for maintaining optimum performance. Do not use diesel fuel with more than 15 ppm sulfur content. Do not use a diesel blend containing more than 20% biodiesel by volume. Both diesel and biodiesel blends must meet all the requirements as defined in the most current versions of the local fuel standards. See the recommended fuels under What Fuel to Use in the U.S. 0 46 and What Fuel to Use in Canada 0 47. The exhaust brake will be more active when in Tow/Haul Mode. Fuel for Diesel Engines 4-Cylinder Vans For 4-cylinder pickups and vans, the exhaust brake is activated when Tow/Haul Mode is activated. See “Tow/Haul Mode” in the owner manual. 4-Cylinder Pickups A light comes on in the instrument cluster when the exhaust brake and Tow/Haul are activated. The switch must be pressed at each vehicle start for the system to be active. Caution Engine damage may occur if recommended fuels are not used, which may void the vehicle warranty. Some improper fuels are: (Continued) Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 46 Driving and Operating Caution (Continued) . Diesel fuel with the addition of gasoline. . Diesel fuel mixed with engine oil or automatic transmission fluid. . Triglyceride fuels, such as raw vegetable oil or animal fat, in any form, including with blends of diesel or biodiesel. . Marine diesel fuel and fuel oils. . Diesel-water emulsions, such as Aquazole. . Aftermarket diesel fuel additives, which contain alcohols, organo-metallic additives, or water emulsifiers. . Diesel fuel with sulfur greater than 15 ppm. . Diesel-biodiesel blends not within the required specification. Some conditions, such as dirty fuel, may decrease fuel filter life and a CHANGE FUEL FILTER message may come on in the Driver Information Center (DIC). What Fuel to Use in the U.S. Use of diesel fuel with ultra low sulfur content (15 ppm, maximum) is required. Look for service station fuel dispensers with this label in green: Use diesel fuel that meets ASTM specification D975, Grades No. 2-D or No. 1-D S15, also known as Ultra Low Sulfur Diesel. Contact a fuel suppler for any questions. Caution Use of diesel fuel other than Ultra Low Sulfur Diesel (15 ppm sulfur maximum) will cause damage to the exhaust after-treatment system. This damage would not be covered by the vehicle warranty. Do not use marine, locomotive, or boiler distillate fuel since it may contain higher sulfur levels. Diesel Fuel Grades For best results use No. 2-D diesel fuel year-round because it is blended for seasonal temperature differences, both above and below freezing conditions. No. 1-D diesel also meeting ASTM International D975 fuel can be used in very cold temperatures (below −18 °C or 0 °F); however, it will reduce power Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating and fuel economy. Avoid using No. 1-D diesel fuel in warm or hot climates. It can result in stalling, poor starting when the engine is hot, and damage to the fuel injection system. Premium Diesel Fuel Premium Diesel Fuel (FQP-1A) corresponding to the Engine Manufacturers Association (EMA) Recommended Guideline may provide less noise, better starting, and better vehicle performance, but is not required. What Fuel to Use in Canada Use of diesel fuel with ultra low sulfur content (15 ppm maximum) is required. Use diesel fuel that meets CAN/CGSB-3.517 specification in Canada. Contact a fuel supplier for questions about fuel. Caution Use of diesel fuel other than Ultra Low Sulfur Diesel (15 ppm sulfur maximum) will cause damage to the exhaust after-treatment system. This damage would not be covered by the vehicle warranty. Do not use marine, locomotive, or boiler distillate fuel since it may contain higher sulfur levels. Diesel Fuel Types Fuels are blended for seasonal changes. Diesel Type A fuel is blended to ensure vehicles operate in extreme cold temperatures. This fuel, however, may cause some power and fuel economy losses. Diesel Type B fuel is blended for higher temperatures experienced during most of the year. Avoid using Diesel Type A fuel in warm or hot climates. Doing so can result in stalling, poor starting when the engine is hot, and damage to the fuel injection system. 47 Premium Diesel Fuel If available, premium diesel fuel (FQP-1A) corresponding to the Engine Manufacturers Association (EMA) Recommended Guideline could provide better starting and vehicle performance with less noise. Biodiesel Biodiesel is a renewable fuel produced from vegetable oils or animal fats that have been chemically modified to make it compatible with diesel fuel. Caution Do not use home-made biodiesel or home test kits because the quality cannot be verified by approved scientific methods. Do not use raw vegetable oil or other unmodified bio-oils, fats, or blends of vegetable oil with diesel. They could damage the fuel system and engine, and damages would not be covered by the vehicle warranty. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 48 Driving and Operating Caution Do not use blends containing more than 20% biodiesel. Any engine, fuel system, or exhaust after-treatment system damage would not be covered by the vehicle warranty. As a renewable fuel, biodiesel provides some environmental benefits. However, biodiesel has unique properties and needs to be handled differently than diesel fuel. Its use presents additional risks and may not be appropriate in all situations. Certain vehicle operating modes increase these risks and should be avoided. Read further to determine if your driving habits are compatible with the use of biodiesel. Biodiesel fuel quality degrades with time and exposure to high temperature quicker than Ultra Low Sulfur Diesel fuel. More frequent refueling provides the best opportunity to have a supply of fresh fuel. Storage at hot ambient temperatures will accelerate biodiesel degradation. Owners who use very little fuel, or who have vehicles stored for extended periods of time, should avoid the use of biodiesel blended fuels above 5% by volume. When vehicles are stored for longer than one month, they should be run out of biodiesel to below one-quarter tank, refueled with Ultra Low Sulfur Diesel fuel, and driven several miles before storage. At temperatures below 32 °F (0 °C), it is recommended to switch to Ultra Low Sulfur Diesel fuel with no biodiesel content, or to blends with biodiesel containing less than 5% by volume. At these extreme cold temperatures, biodiesel blends higher than 5% by volume may cause fuel filter plugging and system gelling, which can lead to vehicle operability problems. Fuels improperly blended for cold temperature operation may result in restricted fuel filters and degraded vehicle performance. The vehicle is equipped with a fuel heating system to provide a level of protection against filter plugging from gelling or waxing of conventional diesel fuel and biodiesel blends. If the operating temperature is far below the temperature at which gelling or waxing of the fuel occurs, the system will not prevent all cases of filter plugging. If the vehicle experiences a fuel filter restriction, the on-board monitoring system will alert the driver that the fuel filter requires service. The fuel filter, however, will not prevent all damage caused by poor quality biodiesel. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating Biodiesel Blends in the U.S. 49 To reduce the risk of poor quality fuel, purchase biodiesel blends from a fuel supplier or fueling station which sells BQ-9000 certified biodiesel. See www.bq-9000.org for a list of certified marketers. Use biodiesel blends that meet the ASTM specification D6751. Retail pumps dispensing blends containing up to 5% biodiesel (B5) are not required to be labeled with the concentration of biodiesel. Blends up to B5 must meet ASTM D975 (Grades No. 2-D or No. 1-D S15 Ultra Low Sulfur Diesel). When refueling with a biodiesel blend above B5, one of the following labels should appear on the dispenser: Biodiesel Blends in Canada Biodiesel blends that meet the CAN/CGSB-3.522 specifications up to 20% (B20) can be used. Do not use biodiesel blends above 20%, as they may damage the engine and fuel system. Cold Weather Operation Caution In cold weather, the fuel filter may become clogged by wax naturally present in the fuel. To unclog it, move the vehicle to a warm garage area and allow the filter to warm up. The fuel filter may need to be replaced. See Fuel Filter Replacement 0 54. Do not use blends containing more than 20% biodiesel. Any engine, fuel system, or exhaust after-treatment system damage would not be covered by the vehicle warranty. Blends containing more than 5% and up to 20% biodiesel must meet ASTM specification D7467 (Biodiesel blend, B6 - B20) and are labeled with an orange or blue label. At temperatures below 0 °C (32 °F), it is recommended to avoid using biodiesel blends above 5% blend. This blend may cause fuel filter plugging, system gelling, and Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 50 Driving and Operating freezing that may affect vehicle starting. You may need to turn the ignition on and off a few times before the vehicle will start. Also, idle the vehicle for a couple of minutes before accelerating. It is recommended to use Ultra Low Sulfur No. 1-D diesel fuel or a blend of No. 1-D and No. 2-D diesel fuel to enhance vehicle operation in cold weather at temperatures below 0 °C (32 °F). Use of No. 1-D diesel fuel may lower the fuel economy. For additional information for better cold weather operation, see Engine Heater 0 31. Water in Fuel Improper fuel tank inspection or cleaning, or contaminated fuel from suppliers, can cause water to be pumped into the fuel tank along with the diesel fuel. If a WATER IN FUEL SERVICE REQUIRED message displays, the water must be drained immediately. { Warning Caution (Continued) Diesel fuel containing water is still combustible. You or others could be burned. If the fuel needs to be drained, keep sparks, flames, and smoking materials away from the mixture. If the fuel tank needs to be purged to remove water, see your dealer or a qualified technician. Improper purging can damage the fuel system and block the FOH. Water in Fuel Troubleshooting Caution Water in the diesel fuel can corrode internal components of the fuel system and lead to severe damage. It can also support fungus or bacteria growth, which can damage the fuel system and fuel operated heater (FOH) (if equipped). Even with a diesel fuel biocide, the fuel system may still need to be cleaned. Your dealer can advise of the appropriate solution. (Continued) If the WATER IN FUEL SERVICE REQUIRED message comes on: Recommended Problem Action Message displays but goes off during the ignition cycle. The fuel filter is partially filled with water. Drain the water as soon as possible. See "Removing Water from the Fuel Filter" following. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating Problem Message displays and stays on. Recommended Action Drain the fuel filter immediately. If no water can be drained, and the temperature is below freezing, then water may be frozen in the filter. Move the vehicle to a warm location to thaw the water, then drain the fuel. If water still does not drain, see your dealer. Problem Immediately after refueling, message displays and stays on. 51 Recommended Action Caution A large amount of water is in the fuel tank. Drain the fuel filter immediately. If the message stays on or comes back on without refueling, then fuel tank purging is required. See your dealer. If the message displays and the engine stalls or runs rough, do not drive until the water contaminated fuel is drained. Driving with this message on can damage the fuel injection system and the engine. If the message comes on right after a refuel, water was pumped into the fuel tank. Turn off the engine and drain the water immediately. Removing Water from the Fuel Filter To drain water: 1. Turn the engine off and apply the parking brake. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 52 Driving and Operating 2. Place a container under the filter drain valve. The filter drain valve is on the bottom of the fuel filter. The filter drain valve is under the vehicle on the driver side, inside the frame rail. 8-Cylinder Pickup Shown, Van Similar 3. For 8-cylinder pickup and 4-cylinder van models, open the drain valve by turning it counterclockwise. Allow the filter to drain until all of the water has been removed. Close the valve. For 4-cylinder pickups, open the fuel filter drain valve by turning it two to three turns. Allow the filter to drain until all of the water has been removed. Close the valve hand tight. 4. Properly dispose of the water contaminated fuel. 4-Cylinder Pickup 5. Start the engine and let it run for a few minutes. During the draining process, air may have entered the fuel system. If the engine stalls, the fuel system may need to be primed. See “Fuel Priming” following. Fuel Priming For the fuel system to work properly, the fuel lines must be full of fuel. If air gets in, the fuel lines need to be primed before operating the vehicle and the fuel operated heater (FOH). If air is present, the following may have happened: . The vehicle ran out of fuel. . The fuel filter was removed. . The fuel lines were removed or disconnected. . The fuel filter water drain valve was opened while the engine was running. . The FOH pump and FOH fuel lines were removed or disconnected. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating The system is not harmed by air in the fuel lines; however, the engine and/or the FOH may not start until the fuel system is primed and the air is removed. 5. Repeat the above steps until the engine starts. Priming the Fuel System 7. If the engine starts and runs but stalls again, turn the ignition off for 60 seconds. There is an electric priming pump that will bring fuel to the engine and eliminate air in the fuel lines. To prime the engine: 1. Correct any condition that caused the loss of prime. 2. Turn the ignition on for 30 seconds. Do not start the engine. The fuel pump will start priming. 3. Turn the ignition off, then back to start, and crank the engine for 15 seconds. 4. If the engine does not start, repeat Steps 2 and 3 until the engine starts. If the engine does not start after repeating Steps 2 and 3 three times, turn the ignition off for 60 seconds. 6. If the engine starts, but does not run smoothly, increase the engine speed slightly. 8. When the engine starts, let it idle for a few minutes and check the filter for any leaks. To Prime the Fuel Operated Heater (FOH) Fuel Lines (Van Models) See your dealer or qualified technician if the FOH fuel lines need to be primed. Running Out of Fuel 8-Cylinder Pickup Models { Warning Diesel fuel is combustible. It could start a fire if it gets on hot engine parts. You could be burned. Catch (Continued) 53 Warning (Continued) any fuel from the air bleed valve, and wipe up any spilled fuel with a cloth. If the engine has stalled due to running out of fuel, try the following steps to restart it: 1. If parked on a level surface, add at least 7.6 L (2 gal) of fuel. Up to 18.9 L (5 gal) may be needed if parked on a slope. 2. Follow the fuel priming procedure earlier in this section to prime the fuel filter. 3. Turn the ignition key to START for 10 to 15 seconds at a time until the engine starts. If the engine tries to run, but does not run smoothly, increase the rpm slightly by using the accelerator pedal. This will help force air through the system. 4. Return to Step 2 if the engine stalls and will not restart. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 54 Driving and Operating 5. After a few attempts, if the engine still does not start, see your dealer. 4-Cylinder Pickup and Van Models If the engine has stalled due to running out of fuel, try to restart it: 1. If parked on a level surface, add at least 3.8 L (1 gal) of fuel. Up to 18.9 L (5 gal) may be needed if parked on a slope. 2. Follow the vehicle fuel system priming procedure earlier in this section to re-prime the system and restart the engine. If the check engine light comes on due to running out of fuel, it may take a few drive cycles to clear. On van models only, the fuel operated heater (FOH) stops automatically when the fuel tank volume is less than or equal to 10% of the total tank. The FOH fuel lines will not need to be primed if the vehicle runs out of fuel. Fuel Filter Replacement 8-Cylinder Pickup and 4-Cylinder Van Models { Warning Diesel fuel is flammable. It could start a fire if something ignites it, and people could be burned. Do not let it get on hot engine parts, and keep matches or other ignition sources away. The fuel filter is on the driver side, inside the frame rail. To replace the fuel filter: 1. Drain any water from the filter. See “Removing Water from the Fuel Filter” in Water in Fuel 0 50. Keep the engine off until the procedure is completed. 2. Apply the parking brake. Van Shown, Pickup Similar 3. Remove the filter element cap by turning it counterclockwise. 4. Remove the filter element. If there is any dirt on the filter sealing surface, clean it off. 5. Install the new filter element and o-ring. 6. Reinstall and tighten the filter cap to the housing. 7. Use the fuel filter priming procedure to prime the fuel filter. See “Fuel Priming” in Water in Fuel 0 50. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating 8. Start the engine and let it idle for five minutes. Check the fuel filter and air bleed valve for leaks. Caution Failure to cover the fuel filter with a clean cloth to keep out debris when replacing may cause dirt to get into the engine. This could cause engine damage. Keep the fuel filter covered with a clean cloth when replacing. 9. Reset the fuel filter monitor. See Driver Information Center (DIC) 0 21. If the van Fuel Operated Heater (FOH) (if equipped) is not working, the FOH line requires priming. See your dealer for service. See Fuel Operated Heater (FOH) (Van Models Only) 0 33. 4-Cylinder Pickup Models { Warning Diesel fuel is flammable. It could start a fire if something ignites it, and people could be burned. Do not let it get on hot engine parts, and keep matches or other ignition sources away. 55 The fuel filter is on the driver side, inside the frame rail in front of the fuel tank. 1. Drain any water from the filter. See “Removing Water from the Fuel Filter” in Water in Fuel 0 50. Keep the engine off until the procedure is completed. 2. Apply the parking brake. 3. There are two caps under the filter. Clean the fuel filter area before removing these two filter caps. 4. Remove both filter elements. If there is any dirt on the filter sealing surface, clean it off. 5. Install the new filter elements and tighten both caps. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 56 Driving and Operating 6. Use the fuel filter priming procedure earlier in this section to prime the fuel filter. 7. Start the engine and let it idle for five minutes. Check the fuel filter for leaks. 8. Reset the fuel filter monitor. See Driver Information Center (DIC) 0 21. Filling the Tank { Warning Fuel vapors and fuel fires burn violently and can cause injury or death. . To help avoid injuries to you and others, read and follow all the instructions on the fuel pump island. . Turn off the engine when refueling. . Keep sparks, flames, and smoking materials away from fuel. (Continued) Warning (Continued) . Do not leave the fuel pump unattended. . Do not re-enter the vehicle while pumping fuel. . Keep children away from the fuel pump and never let children pump fuel. . Fuel can spray out if the fuel cap is opened too quickly. This spray can happen if the tank is nearly full, and is more likely in hot weather. Open the fuel cap slowly and wait for any hiss noise to stop, then unscrew the cap all the way. Van Shown, Pickup Similar The green fuel cap is behind a hinged door on the driver side of the vehicle. On van and 4-cylinder pickup models, the blue Diesel Exhaust Fluid cap is also behind the fuel door. Do not remove both caps at the same time. For models with dual fuel tanks, the fuel gauge shows an average of both tanks. The rear tank is emptied first. When refueling, refuel the front tank first, then add fuel to the rear tank. To remove the fuel cap, turn it slowly counterclockwise. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating 57 { Warning { Warning Caution Overfilling the fuel tank by more than three clicks of a standard fill nozzle may cause: . Vehicle performance issues, including engine stalling and damage to the fuel system. . Fuel spills. Heat coming from the engine can cause the fuel to expand and force the fuel out of the tank. If something ignites the fuel, a fire could start. To help avoid this, fill the tank slowly and only until the nozzle shuts off. Do not top it off. Clean up any spilled fuel. If a new fuel cap is needed, be sure to get the right type of cap from your dealer. The wrong type of fuel cap might not fit properly and could damage the fuel tank and emissions system. . Potential fuel fires. Be careful not to spill fuel. Wait a few seconds after you have finished pumping before removing the nozzle. Clean fuel from painted surfaces as soon as possible. See “Exterior Care” in the owner’s manual. Diesel fuel can foam when filling the tank. This can cause the automatic pump nozzle to shut off, even if the tank is not full. If this happens, wait for the foaming to stop, and then fill the tank more slowly. When replacing the fuel cap, turn it clockwise until it clicks. Make sure the cap is fully installed. { Warning If a fire starts while you are refueling, do not remove the nozzle. Shut off the flow of fuel by shutting off the pump or by notifying the station attendant. Leave the area immediately. Accidental Refueling with Gasoline Caution If the vehicle is accidentally refueled with gasoline, do not continue driving the vehicle except to get to a location where it can be stopped safely. Driving the vehicle will damage the fuel system. Have the vehicle towed to a qualified technician to have the gasoline removed from the tank and fuel system. Flush the fuel system with Ultra Low Sulfur Diesel fuel to ensure all gasoline is removed. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 58 Driving and Operating Filling a Portable Fuel Container { Warning Filling a portable fuel container while it is in the vehicle can cause fuel vapors that can ignite either by static electricity or other means. You or others could be badly burned and the vehicle could be damaged. Always: . Use approved fuel containers. . Remove the container from the vehicle, trunk, or pickup bed before filling. . Place the container on the ground. (Continued) Warning (Continued) . Place the nozzle inside the fill opening of the container before dispensing fuel, and keep it in contact with the fill opening until filling is complete. . Fill the container no more than 95% full to allow for expansion. . Do not smoke, light matches, or use lighters while pumping fuel. . Avoid using cell phones or other electronic devices. Trailer Towing When towing at high elevation on steep uphill grades, consider the following: Engine coolant at higher elevation will boil at a lower temperature than at or near sea level. If the engine is turned off immediately after towing at high elevation on steep uphill grades, the vehicle may show signs similar to engine overheating. To avoid this, let the engine run while parked (preferably on level ground) with the transmission in P (Park) and the parking brake applied for at least five minutes before turning the engine off. If the overheat warning comes on, see Engine Overheating 0 106. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating 59 Use the following chart to determine the maximum the trailer can weigh, based upon your vehicle model and options. All axles of the trailer must be equipped with brakes adequate for the intended use. Trailer braking equipment conforming to Canadian Standards Association (CSA) requirement CAN3-D313, or its equivalent, is recommended. 2500/3500 Series Pickup Models – SAE J2807 Compliant Axle Ratio Max. Trailer Wt. 5 GCWR * Pickup Model Double Cab Standard Box 1 3.73 7 439 kg (16,400 lb) 11 476 kg (25,300 lb) Pickup Model Crew Cab Standard Box 1 3.73 6 985 kg (15,400 lb) 11 476 kg (25,300 lb) Pickup Model Regular Cab Long Box 2 3.73 8 210 kg (18,100 lb) 11 476 kg (25,300 lb) Pickup Model Double Cab Long Box 2 3.73 7 121 kg (15,700 lb) 11 476 kg (25,300 lb) Pickup Model Crew Cab Long Box 2 3.73 6 713 kg (14,800 lb) 11 476 kg (25,300 lb) Pickup Model Double Cab Standard Box 1 3.73 6 532 kg (14,400 lb) 11 476 kg (25,300 lb) Pickup Model Crew Cab Standard Box 1 3.73 6 123 kg (13,500 lb) 11 476 kg (25,300 lb) Vehicle C-2500 Pickup Models – 2WD K-2500 Pickup Models – 4WD Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 60 Driving and Operating 2500/3500 Series Pickup Models – SAE J2807 Compliant Vehicle Axle Ratio Max. Trailer Wt.5 GCWR * Pickup Model Regular Cab Long Box 2 3.73 7 212 kg (15,900 lb) 11 476 kg (25,300 lb) Pickup Model Double Cab Long Box 2 3.73 6 214 kg (13,700 lb) 11 476 kg (25,300 lb) Pickup Model Crew Cab Long Box 2 3.73 5 625 kg (12,400 lb) 11 476 kg (25,300 lb) 3.73 7 938 kg (17,500 lb) 11 476 kg (25,300 lb) 3.73 10 523 kg (23,200 lb) 14 197 kg (31,300 lb) 7 938 kg (17,500 lb) 11 476 kg (25,300 lb) 3.73 7 893 kg (17,400 lb) 11 476 kg (25,300 lb) 3.73 10 478 kg (23,100 lb) 14 197 kg (31,300 lb) 3.73 7 983 kg (17,600 lb) 11 476 kg (25,300 lb) 3.73 10 569 kg (23,300 lb) 14 197 kg (31,300 lb) C-3500 Pickup Model Double Cab Long Box – 2WD Single Rear Wheels Dual Rear Wheels 2 3 C-3500 Pickup Model Crew Cab Standard Box – 2WD Single Rear Wheels 1 3.73 C-3500 Pickup Model Crew Cab Long Box – 2WD Single Rear Wheels Dual Rear Wheels 2 3 K-3500 Pickup Model Regular Cab Long Box – 4WD Single Rear Wheels Dual Rear Wheels 3 2 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating 2500/3500 Series Pickup Models – SAE J2807 Compliant Vehicle Max. Trailer Wt.5 GCWR * 3.73 7 802 kg (17,200 lb) 11 476 kg (25,300 lb) 3.73 10 387 kg (22,900 lb) 14 197 kg (31,300 lb) 7 802 kg (17,200 lb) 11 476 kg (25,300 lb) 3.73 7 711 kg (17,000 lb) 11 476 kg (25,300 lb) 3.73 10 297 kg (22,700 lb) 14 197 kg (31,300 lb) Axle Ratio K-3500 Pickup Model Double Cab Long Box – 4WD Single Rear Wheels Dual Rear Wheels 2 3 K-3500 Pickup Model Crew Cab Standard Box – 4WD Single Rear Wheels 1 3.73 K-3500 Pickup Model Crew Cab Long Box – 4WD Single Rear Wheels Dual Rear Wheels 3 4 *The Gross Combination Weight Rating (GCWR) is the total allowable weight of the completely loaded vehicle and trailer including any passengers, cargo, equipment, and conversions. The GCWR for the vehicle should not be exceeded. 1 Trailer rating limited to 5 897 kg (13,000 lb) with conventional hitch. 2 Trailer rating limited to 6 577 kg (14,500 lb) with conventional hitch. 3 Trailer rating limited to 9 072 kg (20,000 lb) with conventional hitch. 4 Trailer rating limited to 6 804 kg (15,000 lb) with conventional hitch. 5 For chassis cab and pickup box delete vehicles, choose an appropriate hitch and load the truck and trailer within the limits of GCWR, GVWR, and RGAWR. 61 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 62 Driving and Operating C/K-3600 Series Chassis Cab Vehicle Axle Ratio Max. Trailer Wt.2 GCWR * 3.73 1 14 197 kg (31,300 lb) C/K-3600 Chassis Cab – 2WD/4WD All *The Gross Combination Weight Rating (GCWR) is the total allowable weight of the completely loaded vehicle and trailer including any passengers, cargo, equipment, and conversions. The GCWR for the vehicle should not be exceeded. 1 Maximum Trailer Weight cannot be provided because total vehicle weight is unknown. 2 For chassis cab and pickup box delete vehicles, choose an appropriate hitch and load the truck and trailer within the limits of GCWR, GVWR, and RGAWR. Colorado/Canyon Pickup Models – SAE J2807 Compliant Vehicle Axle Ratio Max. Trailer Wt. GCWR * 3.42 3 492 kg (7,700 lb) 5 761 kg (12,700 lb) Short Wheelbase Ext. Cab 3.42 3 492 kg (7,700 lb) 5 761 kg (12,700 lb) Short Wheelbase Crew Cab 3.42 3 447 kg (7,600 lb) 5 761 kg (12,700 lb) Colorado Pickup – Long Wheelbase Crew Cab 3.42 3 447 kg (7,600 lb) 5 761 kg (12,700 lb) Colorado/Canyon Pickup Models – 2WD All Colorado/Canyon Pickup Models – 4WD Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating Colorado/Canyon Pickup Models – SAE J2807 Compliant Vehicle Canyon Pickup – Long Wheelbase Crew Cab Axle Ratio Max. Trailer Wt. GCWR * 3.42 3 425 kg (7,550 lb) 5 761 kg (12,700 lb) 3.42 2 268 kg (5,000 lb) 4 853 kg (10,700 lb) Colorado ZR2 Models – 4WD All *The Gross Combination Weight Rating (GCWR) is the total allowable weight of the completely loaded vehicle and trailer including any passengers, cargo, equipment, and conversions. The GCWR for the vehicle should not be exceeded. 2500/3500 Series Van Models Axle Ratio Max. Trailer Wt.1 GCWR * G2500 Cargo Van Short Wheelbase 3.42 3 175 kg (7,000 lb) 5 897 kg (13,000 lb) G2500 Cargo Van Long Wheelbase 3.42 2 767 kg (6,100 lb) 5 897 kg (13,000 lb) G3500 Cargo Van Short Wheelbase 3.42 2 812 kg (6,200 lb) 5 897 kg (13,000 lb) G3500 Cargo Van Long Wheelbase 3.42 2 722 kg (6,000 lb) 5 897 kg (13,000 lb) Vehicle 63 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 64 Driving and Operating 2500/3500 Series Van Models Axle Ratio Max. Trailer Wt.1 GCWR * G2500 Passenger Van Short Wheelbase 3.42 2 858 kg (6,300 lb) 5 897 kg (13,000 lb) G3500 Passenger Van Short Wheelbase 3.42 2 586 kg (5,700 lb) 5 897 kg (13,000 lb) G3500 Passenger Van Long Wheelbase 3.42 2 404 kg (5,300 lb) 5 897 kg (13,000 lb) Vehicle *The Gross Combination Weight Rating (GCWR) is the total allowable weight of the completely loaded vehicle and trailer including any passengers, cargo, equipment, and conversions. The GCWR for the vehicle should not be exceeded. 1 For Full Box Vans, choose an appropriate hitch and load the truck and trailer within the limits of GCWR, GVWR, and RGAWR. See “Trailer Towing” in the owner manual for kingpin weight and trailer tongue weight information. Weight of the Trailer Tongue The tongue weight load (1) of any trailer is very important because it is also part of the vehicle weight. The Gross Vehicle Weight (GVW) includes the curb weight of the vehicle, any cargo carried in it, and the people who will be riding in the vehicle as well as trailer tongue weight. Vehicle options, equipment, passengers, and cargo in the vehicle reduce the amount of tongue weight the vehicle can carry, which will also reduce the trailer weight the vehicle can tow. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating Colorado/Canyon Vehicle Series In general, trailer tongue weight (1) should be 10–15% and fifth-wheel or gooseneck kingpin weight should be 15–25% of the loaded trailer weight (2). Some specific trailer types, such as boat trailers, fall outside of this range. Refer to the trailer owner’s manual for the recommended trailer tongue weight. In all cases, do not exceed the maximum loads for the vehicle series and hitch type. Hitch Type Maximum Tongue Weight 2.8L Diesel 4x2 (ALL) Conventional Load 349 kg (770 lb) 2.8L Diesel SWB Ext. Cab 4x4 Conventional Load 349 kg (770 lb) 2.8L Diesel SWB/ LWB Crew Cab 4x4 Conventional Load 345 kg (760 lb) Do not exceed the maximum allowable tongue weight for the vehicle. Choose the shortest hitch extension that will position the hitch ball closest to the vehicle. This will help reduce the effect of trailer tongue weight on the rear axle. Trailer rating may be limited by the vehicle's ability to carry tongue weight. Tongue or kingpin weight cannot cause the vehicle to exceed the GVWR (Gross Vehicle Weight Rating) or the RGAWR (Rear Gross Axle Weight Rating). See “Total Weight on the Vehicle's Tires” in the owner manual. 65 After loading the trailer, weigh the trailer and then the tongue, separately, to see if the weights are proper. If they are not, adjustments might be made by moving some items around in the trailer. If a cargo carrier is used in the trailer hitch receiver, choose a carrier that positions the load as close to the vehicle as possible. Make sure the total weight, including the carrier, is no more than half of the maximum allowable tongue weight for the vehicle or 227 kg (500 lb), whichever is less. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 66 Driving and Operating Conversions and Add-Ons Power Take-Off (PTO) If equipped, the Power Take-Off (PTO) is a GM Upfitter integrated system that is used to create an auxiliary power source for running add-on equipment, such as salt spreaders, snow plows, winches, and lift buckets. The PTO system controls engine speed to values higher than normal base idle, PTO load relay engagement, and remote starting and shutdown of the engine. When installing PTO aftermarket equipment, the PTO wiring and operation recommendations provided by the service manual and GM Upfitter documentation must be strictly followed. Refer to the bulletins in the Upfitter Integration website www.gmupfitter.com for the Power Take Off (PTO) operating description and application guide. Caution Engine exhaust contains Carbon Monoxide (CO), which cannot be seen or smelled. Exposure to CO can cause unconsciousness or even death. Never operate PTO in an enclosed area such as a garage or building that has no fresh air ventilation. See “Engine Exhaust” in the owner manual. Primary PTO Operating Modes PTO modes of operation are: . Preset Stationary operation only: In-cab control is standard, remote control is available. . Stationary operation only: In-cab control is standard, remote control is available. . Caution If the key is in the ignition during Remote PTO operation, the vehicle can be shifted out of P (Park). Even though PTO will be disengaged, depending on PTO Upfitter application, personal injury or property damage may result from vehicle movement. Always remove the key from the ignition before operating Remote PTO. Variable Mobile In-cab control only. . Operator Selectable In-Cab Mode (OSIM) OSIM is for in-cab operation only. OSIM is for vehicles that require both stationary and mobile modes. OSIM is available via the GM Service Tool only. During the configuration of OSIM, two modes must be paired. The options for pairing are: stationary preset and mobile, or stationary variable and mobile. During activation of OSIM, the operator Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating must select one of the two modes within the pre-configured pairing. If an OSIM mode is not selected, PTO will not operate. OSIM modes of operation are: ‐ Stationary For stationary mode, the configuration may be stationary preset or stationary variable. ‐ Mobile For mobile mode, the configuration is variable only. Selection between OSIM pairings is not available. Remote modes are not available. The factory default programming enables in-cab control. For stationary modes, a GM Service Tool can reprogram the system to allow for remote control and disable the in-cab control. All PTO modes provide for engine rpm control and PTO load relay control. All PTO modes provide for safety interlocks for PTO load disengagement. Remote PTO modes provide for remote engine starting and shutdown. Stationary in-cab and Remote PTO modes provide for engine shutdown due to critical engine conditions, as well as a timed engine shutdown feature. Preset PTO Preset Enable Conditions – In-Cab Operation To enable PTO: 1. With the engine running, shift the vehicle into P (Park) and set the parking brake. Do not press the brake pedal. 2. Confirm that cruise control is off. 3. Press and release the PTO in-cab switch below the climate controls in the center stack. The PTO indicator light will blink rapidly until the PTO load 67 relay becomes engaged and will then be on steady. The engine will advance to the PTO Standby Speed. 4. Once the PTO Standby Speed is reached, use SET− and +RES on the cruise control to reach the Set 1 or Set 2 PTO engine speeds. The accelerator pedal is disabled and cannot be used to override the PTO preset speeds. Factory Default PTO Engine Speeds Standby 900 rpm Set 1 (SET−) 1200 rpm Set 2 (+RES) 1900 rpm The first time a vehicle is used for PTO: 1. The PTO Control setting on the GM Service Tool is programmed to Interior Mode PTO Switch. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 68 Driving and Operating 2. Check the correct operation of the default PTO preset stationary mode to observe the three idle up speeds. The PTO function should be confirmed before any wiring modifications are done or any reprogramming is attempted. See your dealer if the default presets are not functioning properly. 2. Set the parking brake and shift the transmission into P (Park). Preset Enable Conditions – Remote Operation In-Cab Enable 3. Turn the engine off. Remove or place the key in the ignition off position. Lock the vehicle, if desired. This requires programming with the GM Service Tool and remote switch panel provided by GM Upfitter. 3. The PTO indicator light will not initially reflect the status of the PTO load until the PTO load relay is wired into the system. The PTO load relay output is enabled as a factory default. When the PTO indicator light is either blinking or on solid, the PTO relay output will be activated. 6. Within five seconds, open and close the Remote PTO Engine Start/Shutdown switch. 2. Confirm that cruise control is off. 7. The horn will chirp, and then engine starting will be automatically initiated. The PTO system will then elevate engine rpm to PTO Standby Speed and engage the PTO load relay. 4. Press and release the in-cab PTO switch. 8. The Remote PTO Set switch can now be used to accomplish the PTO Set 1 and Set 2 engine speeds. 6. The Remote PTO Set switch may be used to select PTO Set 1 and Set 2 engine speeds. Preset Enable Conditions – Remote Operation This requires programming with the GM Service Tool and remote switch panel provided by GM Upfitter. 1. Confirm that cruise control is off. 4. Confirm the hood is closed. 5. From outside the vehicle, press and release the Remote PTO Arm switch. The accelerator pedal is disabled when Remote PTO operation is selected. Starting remote operation in-cab: 1. With the engine running, shift the vehicle into P (Park), release the brake pedal, and set the parking brake. 3. Confirm the hood is closed. 5. The horn will chirp, the PTO load relay will engage, and the engine will advance to the PTO Standby Speed. The accelerator pedal is disabled when Remote PTO operation is selected. The operator may exit the vehicle. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating { Warning If the key is in the ignition during Remote PTO operation, the vehicle can be shifted out of P (Park) by an unauthorized operator. Even though PTO will be disengaged, depending on PTO Upfitter application, personal injury or property damage may result from vehicle movement. The operator must ensure that the vehicle is secured against unauthorized access during Remote PTO operation. Remote PTO operation may be ended by pressing the brake pedal at which time the PTO load relay disengages and the engine returns to base idle speed. The operator may drive the vehicle after releasing the park brake. cruise control to select the PTO Set 1 speed. Press and release +RES on the cruise control to select the PTO Set 2 speed. Preset Enable Conditions – Operator Selectable In-Cab Mode (OSIM) This requires programming with the GM Service Tool and requires pairing OSIM stationary preset with OSIM mobile mode. If OSIM pairing has been configured, initiate OSIM preset operation: . The PTO load relay engages immediately when the PTO operation is initiated by the switch input. The transmission torque converter is unlocked. The torque converter will lock upon reaching stable PTO Standby Speed (default = 900 rpm) so maximum power is available. . The first elevated engine speed, PTO Standby Speed, is not intended as a working speed but as a verification that the system is active and ready to go to a working speed. This speed can be modified to a working speed with the GM Service Tool. The upper limit for PTO Standby Speed is 1500 rpm. . The remote switches and relay connections are made at the PTO Upfitter Connector located on the chassis frame behind the cab. 1. With the engine running, shift the vehicle into P (Park) and release the brake pedal, and set the parking brake. 2. Confirm cruise control is off. 3. Confirm the hood is closed. 4. Press and release the in-cab PTO switch. The PTO indicator light will blink slowly. 5. Within 10 seconds, press and release SET− on the cruise control. 6. The PTO indicator light will change to solid when the PTO load relay becomes engaged. The engine speed will advance to the PTO Standby Speed. Press and release SET− on the 69 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 70 . Driving and Operating The PTO Control setting on the Service Tool must be programmed to Remote PTO Mode Switch before the remote switches can be used. . The PTO relay is programmed to be enabled in the factory default configuration. . Refer to the service manual or go to the Upfitter Integration website www.gmupfitter.com for details, advanced programming features, and usage with a removable pendant. Variable PTO Variable Enable Conditions – In-Cab Operation To enable PTO: 1. With the engine running, shift the vehicle into P (Park) and set the parking brake. Do not press the brake pedal. 2. Press and release the PTO in-cab switch below the climate controls in the center stack. The PTO indicator light will blink rapidly until the PTO load relay becomes engaged and will then be on steady. The engine will advance to the PTO Standby Speed. 3. Once PTO Standby Speed is reached, SET− and +RES on the cruise control can be used to tap up and tap down the engine speed. Factory setting for the tap step is 100 rpm and the setting for the ramp rate is 150 rpm/sec. The GM Service Tool can enable the capability to change the default value for tap step via the Radio Customization menu. The default values for both tap step and ramp rate can be changed with the GM Service Tool. The accelerator pedal is disabled, and cannot be used to control PTO engine speed. Variable Enable Conditions – Remote Operation This requires programming with the GM Service Tool and the appropriate remote switch panel provided by GM Upfitter. 1. Confirm that cruise control is off. 2. Set the parking brake and shift the transmission into P (Park). 3. Turn the engine off. Remove or place the key in the ignition off position. Lock the vehicle, if desired. 4. The hood must be closed. 5. From outside the vehicle, press and release the Remote PTO Arm switch. 6. Within five seconds, open and close the Remote PTO Engine Start/Shutdown switch. 7. The horn will chirp, and then engine starting will be automatically initiated. The PTO system will then elevate engine rpm to PTO Standby Speed and engage the PTO load relay. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating Variable Enable Conditions – Remote Operation In-Cab Enable Starting Remote Operation from In-Cab This requires programming with the GM Service Tool and remote switch panel provided by GM Upfitter. 1. With the engine running, shift the vehicle into P (Park), release the brake pedal, and set the parking brake. 2. Confirm cruise control is off. 3. Confirm the hood is closed. 4. Press and release the PTO in-cab switch. 5. The horn will chirp, the PTO load relay will engage, and the engine will advance to the PTO Standby Speed. The operator may exit the vehicle. { Warning If the key is in the ignition during Remote PTO operation, the vehicle can be shifted out of P (Park) by an unauthorized operator. Even though PTO will be disengaged, depending on PTO Upfitter application, personal injury or property damage may result from vehicle movement. The operator must ensure that the vehicle is secured against unauthorized access during Remote PTO operation. The accelerator pedal is disabled when Remote PTO operation is selected. Remote PTO operation can be ended by pressing the brake pedal. The PTO load relay disengages and the engine returns to base idle speed. The operator may drive the vehicle after releasing the park brake. . 71 The desired engine operating speed can now be accomplished. Two versions of engine rpm control are available, switches or potentiometer, depending on which one was installed. ‐ Switches – the Remote PTO Set and Resume switches can be used to tap up and tap down to the desired engine speed. ‐ Potentiometer – a Remote PTO Throttle Potentiometer can be used as a continuous variable throttle control to dial in the desired engine speed. Variable Enable Conditions – OSIM This requires programming with the GM Service Tool and specific pairing of stationary variable and mobile modes. Remote operation is not available. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 72 Driving and Operating If OSIM pairing has been configured, initiate OSIM stationary variable operation: 1. With the engine running, shift the vehicle into P (Park), release the brake pedal, and set the parking brake. torque converter is unlocked. The torque converter will lock upon reaching stable PTO Standby Speed (default = 900 rpm) so maximum power is available. . 2. Confirm cruise control is off. 3. Confirm the hood is closed. 4. Press and release the PTO in-cab switch. The PTO indicator light will blink slowly. 5. Within 10 seconds, press and release SET− on the cruise control. The PTO load relay will engage and the PTO indicator light will change to solid. The engine speed will advance to the PTO Standby Speed. 6. The desired operating speed may be achieved by tapping up and down with +RES and SET − on the cruise control. . The PTO load relay engages immediately when the PTO operation is initiated by the switch input. The transmission The first elevated engine speed, PTO Standby Speed, is not intended as a working speed but as a verification that the system is active and ready to go to a working speed. . Factory setting for the tap step is 100 rpm and the setting for ramp rate is 150 rpm/sec. The default value for tap step can be modified via the Radio Customization menu. The default values for both tap step and ramp rate can be changed with the GM Service Tool. . The PTO load relay is enabled as the factory default programmed setting. Refer to the service manual or go to the GM Upfitter Integration website www.gmupfitter.com for details. . The relay connections are made at the PTO Upfitter Connector located on the chassis frame behind the cab. . . The engine speeds can be adjusted between the low of PTO Standby Speed and the high of PTO Max Engine speed limits. Both values can be modified from the factory default settings with the GM Service Tool. Based on the value chosen for PTO Max Engine Speed, the PTO menu in the center stack may show speeds that are not available. Mobile PTO Mobile Enable Conditions – In-Cab Operation Only This requires programming with the GM Service Tool. 1. The engine must be running. 2. The parking brake must be released. 3. Confirm that cruise control is off. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating 4. Engine rpm must be less than 1500 rpm. 5. Shift the transmission to M1, M2, or M3. 6. Tap the brake pedal and then do not press the brake pedal. 7. Keep the driver door closed. The driver door can be kept open if reconfigured using the GM Service Tool. See www.gmupfitter.com. 8. Press and release the PTO in-cab switch below the climate controls in the center stack. Then within 10 seconds press and release +RES on the cruise control. The PTO indicator light will blink slowly between presses. The PTO indicator light will then blink rapidly until the PTO load becomes engaged, and then come on steady. The engine speed will remain at the current throttle setting or advance to PTO Standby Speed, whichever value is greater. If the engine rpm is above 1500 rpm, the PTO relay will not engage until the engine rpm drops below 1500 rpm. 9. Once engaged, if additional engine speed is desired, use either the cruise control or the accelerator pedal to temporarily adjust the engine speed. ‐ +RES on the cruise control can be used to tap up, or if continuously held to ramp up, to the desired operating speed. SET− on the cruise control can be used to tap down or coast down if continuously held to the desired engine speed. Top limit is PTO Max Engine Speed, default 2100 rpm and programmable to 2900 rpm. Lower limit is PTO Standby Speed, default 900 rpm with program range from base idle to 900 rpm. ‐ The accelerator pedal can be used to achieve the desired speed. When the desired speed is reached, SET− on the cruise control would be 73 used to capture and maintain that speed. Normal tap up and tap down can then be used to fine tune the setting. In Mobile PTO mode, the vehicle speed achieved is the result of the current engine speed requested and the transmission gear range selected. When the vehicle is placed in M2 or M3, the vehicle will upshift according to engine rpm set point, and vehicle speed will increase. To prevent upshifts and maintain lower vehicle speeds, place the vehicle in M1. Mobile Enable Conditions – Operator Selectable In-Cab Mode (OSIM) This requires programming with the GM Service Tool and specific pairing mobile mode with either stationary preset or variable. Remote operation is not available. See “Mobile PTO” previously in this section. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 74 Driving and Operating PTO System Disengage Conditions that a PTO set speed is still stored in memory. Activating +RES on the cruise control will restore engine rpm to the last PTO set speed. Preset or Variable Stationary Modes – In-Cab Operation To disengage PTO, do one of the following: . Press the brake pedal. The engine returns to base idle, but the PTO load relay remains engaged. The PTO indicator light will blink slowly indicating that a PTO set speed is still stored in memory. Upon releasing the brake, the factory default programming is for the engine speed to remain at curb idle. A press and release of +RES on the cruise control will restore engine rpm to the last PTO set speed. The PTO system can also be programmed to return engine rpm to the PTO Standby Speed setting. . Press * on the cruise control. The engine returns to base idle, but the PTO load relay remains engaged. The PTO indicator light will blink slowly indicating . Press and release the PTO in-cab switch. The PTO load relay disengages and the engine returns to base idle. The PTO indicator light will turn off, indicating the PTO load relay is disengaged and the stored set speed has been cleared from memory. Stationary Modes (Preset or Variable) – Remote Control To disengage PTO: . Open the Remote PTO Engine Start/Shutdown switch. Load relay disengages and the engine will stop. . If equipped, press the PTO Emergency Stop switch. Load relay disengages and the engine will stop. Refer to the bulletins in the Upfitter Integration website www.gmupfitter.com for the Power Take Off (PTO) operating description and application guide. . With the key in the ignition and rotated to the RUN position, press the brake pedal. The PTO load relay disengages and the engine returns to base idle speed. The operator may drive the vehicle. Stationary Modes will also disengage if: . Vehicle movement is detected. . The parking brake is released. . The transmission is shifted out of P (Park). . The ignition is cycled from RUN to OFF. . The PTO feedback signal is lost indicating the load is disengaged if used. See www.gmupfitter.com. . Cruise control becomes enabled. . Timed auto-engine shutdown: This feature will shut down the engine automatically after a Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating predefined time. PTO must be operational for this function to be active. . Engine shutdown based on critical engine or PTO system fault conditions: This feature will shut down the engine when PTO is operating if a critical engine condition such as low oil, low oil pressure, hot engine, hot transmission, low fuel, or Diesel Particulate Filter regeneration is detected by the vehicle system. If PTO operation is continued when critical engine conditions are present, a horn chirp warning will occur after 30– 60 seconds. The engine will shut down two minutes after the horn warning. The engine can be restarted with the ignition key or with the Remote PTO engine start controls. The horn warning and engine shutdown will again occur if the critical engine condition is still present. Resume memory speed is cleared for the above actions. When Remote PTO engine starting has been initialized with the ignition key in the RUN position, the shift lever will remain locked if the brake pedal is pressed and a shift from P (Park) is attempted while the engine is running and PTO is active (standby mode). A shift out of P (Park) will not be allowed until one of the following actions is taken by the vehicle operator: . Press the Remote PTO Engine Start/Shutdown switch. . Press the PTO in-cab switch (only if the PTO in-cab Remote Start/Stop feature is enabled). This requires programming with the GM Service Tool. unless the accelerator pedal is pressed. The PTO load relay remains engaged. The PTO indicator light will blink slowly indicating that a PTO set speed is still stored in memory. Upon releasing the brake, the factory default programming is for the engine speed to remain at curb idle awaiting an input from +RES on the cruise control to restore engine rpm to the last PTO set speed. The system can also be programmed to return engine rpm to the PTO Standby Speed setting. . Press * on the cruise control. The engine returns to base idle, but the PTO load relay remains engaged. The PTO indicator light will blink slowly indicating that a PTO set speed is still stored in memory. Pressing +RES on the cruise control will restore engine rpm to the last PTO set speed. . Press the PTO in-cab switch. Load relay disengages and the engine returns to base idle. The 5 on the cruise control. . Press . Release the parking brake. Mobile Mode To disengage PTO: . Press the brake pedal. The PTO system releases control of engine speed, but the PTO load relay remains engaged. The engine will return to base idle 75 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 76 Driving and Operating PTO indicator light will turn off, indicating the PTO load relay is disengaged and the stored set speed has been cleared from memory. Mobile Mode will also disengage if: . PTO feedback input is lost. The engine speed is returned to the PTO Standby speed setting and the load is still engaged. This is configurable with the GM Service Tool. . Vehicle Speed exceeds Max Vehicle Speed. Factory default setting = 94 km/h (58 mph). PTO relay will re-engage and advance to the last engine speed stored in memory when both the Vehicle Speed is reduced below 94 km/h (58 mph) and the engine speed ramps down below the maximum PTO engagement speed (1500 rpm factory default setting). . Engine Speed exceeds Max Engine Speed for more than 15 seconds. Factory default setting = 2100 rpm. . 5 on the cruise control is pressed. . The parking brake is applied. . The shift lever is moved out of manual shift selection, M1, M2, or M3. Resume memory speed is cleared for the above actions. Although the PTO system attempts to limit accelerator and PTO switch inputs to comply with maximum speed and/or rpm parameters, some vehicle operating conditions such as downhill acceleration can cause the vehicle speed or engine rpm to exceed these limits. In those cases, the PTO system may disengage. Operator Selectable In-Cab Mode (OSIM) To disable OSIM Stationary PTO: . Press and release the PTO in-cab switch. To disable OSIM Mobile PTO: . Press and release the PTO in-cab switch. Prolonged or Extended PTO Operation When operating the vehicle in stationary PTO mode, the Diesel Particulate Filter (DPF) will continue to filter the exhaust and accumulate soot. The engine control system, depending on the speed and load being applied by the PTO, may not be able to generate enough energy or adequate heat needed to automatically clean or regenerate the DPF. If manual regeneration is not initiated, continued operation under conditions that do not allow effective regeneration or cleaning will eventually plug the DPF and result in reduced power. The ENGINE POWER IS REDUCED Driver Information Center (DIC) message and malfunction indicator lamp will be displayed, and dealer service will be required to return the vehicle to normal, full power operation. To prevent this from occurring, frequently monitor the vehicle during stationary PTO operation, paying particular attention to any horn chirps and/or the Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating CLEAN EXHAUST FILTER SEE OWNER MANUAL NOW DIC warning messages. If the DIC message is displayed during PTO operation, see Diesel Particulate Filter 0 34 for information on how to clean or regenerate the DPF. PTO Operational Speed Control Variable PTO operational speed control provides the following functions: Cruise Control SET− (In-Cab) or Remote PTO Set 1 Switch SET : Press and hold the accelerator to obtain the desired engine speed, then press and release SET− on the cruise control. The current engine speed will be maintained. This action can be repeated as desired to capture a higher rpm value. The PTO set speed cannot exceed 2900 rpm. TAP DOWN : Press and release SET− on the cruise control to reduce the engine speed by increments of 100 rpm. The tap down engine speed increments can be adjusted by the GM Service Tool. The Service Tool can enable the option for adjustment of tap down engine speed increments through the Radio Customization menu. COAST : Press and hold SET− on the cruise control to reduce the rpm at 150 rpm/sec until the desired engine speed is reached or until the initial PTO Standby Speed is reached. In-Cab Cruise Control +RES or Remote PTO Set 2 Switch RESUME : After a PTO set speed has been met, a Resume Speed message is retained after an application of the brake pedal. Engine speed will reduce to basic idle speed. The PTO indicator light will blink slowly indicating the 77 previous PTO set speed has been retained in memory. Press and release +RES on the cruise control to resume the previous PTO set speed. TAP UP : Press and release +RES on the cruise control to increase the engine speed by increments of 100 rpm (factory preset value). The tap up engine speed increments can be adjusted by the GM Service Tool. The Service Tool can enable the option for adjustment of tap up engine speed increments through the Radio Customization menu. ACCEL : Press and hold +RES on the cruise control to increase the rpm by 150 rpm/sec until the desired engine speed is reached or until the maximum allowable PTO set speed is reached. Alternatively, the engine speed acceleration can be adjusted through the Radio Customization menu. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 78 Driving and Operating Factory Preset Parameters The following table lists the factory preset parameters. These may be altered by the GM Service Tool to configure the various PTO features. Programmable Parameters Factory Setting Minimum Value Maximum Value PTO Option Configuration VEHICLE STATIONARY, PRESET SPEED VEHICLE STATIONARY, PRESET SPEED VEHICLE STATIONARY, VARIABLE SPEED VEHICLE MOBILE, VARIABLE SPEED PTO Control In-Cab PTO Mode In-Cab PTO Mode, Remote PTO Mode, Operator In-Cab Selectable Mode (OSIM) Type of Set Switch Operation MOMENTARY MOMENTARY LATCHING PTO SET 1 Engine Speed After PTO On DISABLED DISABLED ENABLED PTO Load Feedback DISABLED DISABLED ENABLED PTO Relay ENABLED DISABLED ENABLED Keep PTO Relay Engaged during Braking or upon Pressing * ENABLED DISABLED ENABLED Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating 79 Programmable Parameters Factory Setting Minimum Value Maximum Value Action after Brake Is Released RETURN TO BASE IDLE rpm RETURN TO BASE IDLE rpm RETURN TO STANDBY rpm Max. vehicle speed may be limited to 64 km/h (40 mph) if this is programmed with the GM Service Tool. Set Low Fuel Level for Engine Shutdown 15% 0% 25% Engine Run Time with PTO Active Timer ENABLED DISABLED ENABLED Engine Run Time while PTO Is Active 420 min 10 min 3480 min PTO Max. Engine Speed 2100 rpm 1100 rpm 2900 rpm Min. Engine Speed for PTO Engagement 500 rpm 500 rpm 1000 rpm Max. Engine Speed for PTO Engagement 1500 rpm 1000 rpm 1800 rpm PTO Standby rpm 900 rpm 700 rpm 1500 rpm PTO Set Speed 1 1200 rpm 1100 rpm 2900 rpm PTO Set Speed 2 1900 rpm 1900 rpm 2900 rpm Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 80 Driving and Operating Programmable Parameters Factory Setting Minimum Value Maximum Value Engine Speed Tap Step 100 rpm 4 rpm 500 rpm Engine Speed Ramp Rate 150 rpm 4 rpm 150 rpm Maximum Vehicle Speed 94 km/h (58 mph) 30 km/h (19 mph) 94 km/h (58 mph) Minimum Remote Potentiometer Threshold 2% 0% 50% Maximum Remote Potentiometer Threshold 95% 50% 100% Remote Set Switch Transition to Low Voltage (<33% of Ignition Voltage) SET SPEED 1 STANDBY SPEED, SET SPEED 1, or SET SPEED 2 Remote Set Switch Transition to Open State (>33% of Ignition, and <67% of Ignition Voltage) PTO STANDBY STANDBY SPEED, SET SPEED 1, or SET SPEED 2 Remote Set Switch Transition to High Voltage (>67% of Ignition Voltage) SET SPEED 2 STANDBY SPEED, SET SPEED 1, or SET SPEED 2 Horn Chirps during a Remote Start Event ENABLED DISABLED ENABLED Personalization Menu ENABLED DISABLED ENABLED Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating Programmable Parameters Factory Setting Minimum Value Maximum Value Standby Speed Menu DISABLED DISABLED ENABLED Set 1 Speed Menu (In Stationary Preset) DISABLED DISABLED ENABLED Set 2 Speed Menu (In Stationary Preset) DISABLED DISABLED ENABLED Engine Run Shutdown Time Menu (In Stationary Preset) DISABLED DISABLED ENABLED Engine Speed Tap Step Menu (In Stationary Variable and Mobile) DISABLED DISABLED ENABLED Remote Set Switch Speed Control DISABLED DISABLED ENABLED Remote Throttle Speed Control DISABLED DISABLED ENABLED Remote Engine Start DISABLED DISABLED ENABLED Remote Engine Shutdown DISABLED DISABLED ENABLED Throttle Override ENABLED DISABLED ENABLED Throttle Override Timer 10 Minutes 10 Minutes 13 Minutes 81 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 82 Driving and Operating Programmable Parameters Factory Setting Minimum Value Maximum Value Driver Door Status Usage ENABLED DISABLED ENABLED Remote PTO In Cab Control DISABLED DISABLED ENABLED If the PTO factory preset parameters do not match the settings described above, then they may have already been altered in order to satisfy the requirements of the installed PTO system and body equipment. The following PTO settings are also offered via the vehicle customization screens, which can be enabled by your service technician. These include the following parameters: . PTO Standby rpm . PTO Set 1 Speed . PTO Set 2 Speed . Tap Step Speed . PTO Engine Run Timer Driver Information Center (DIC) Warning Messages . PTO: REDUCE VEHICLE SPEED If the PTO indicator light does not remain on, it indicates that not all PTO enabling conditions have been met. One or more of the following DIC messages may display if the PTO will not engage and the appropriate action must be taken. . PTO: SHIFT TO PARK (P) (Stationary mode only) . PTO: SET PARK BRAKE (Stationary mode only) . PTO: PRESS & RELEASE BRAKE (Mobile mode only) . PTO: RELEASE BRAKE TO ENGAGE PTO . PTO: REDUCE ENGINE SPEED . PTO: DISENGAGE CRUISE CONTROL . PTO: ACCELERATION UPON BRAKE RELEASE . PTO: SERVICE PTO . PTO: SHIFT TO M1, M2 OR M3 (Mobile mode only) . Action Required Cleaning Exhaust Filter Continue Driving (DPF only) . Action Required Cleaning Exhaust Filter Must Continue Driving (DPF only) Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Driving and Operating . Exhaust Filter Cleaning Available Go to Options Menu (DPF only) In addition, the PTO indicator light will light when all conditions required to engage PTO have not been met. When enabling PTO, the PTO indicator light will turn on, then turn off after one second. Under normal operating conditions, the PTO indicator light will remain on throughout the PTO operating cycle. Additional in-vehicle PTO module information can be accessed by the service technician to aid in troubleshooting. Also see the service manual for more information. The GM service technician can access Service Tool information that will contain reasons why PTO may not engage and why PTO may unexpectedly disengage due to system conditions. See www.gmupfitter.com for information on the installation of wiring and programming for PTO aftermarket equipment. Diesel Particulate Filter Cleaning during PTO Operation This feature is only available on Fleet and Commercial vehicles. To verify that the vehicle has this feature, see www.gmupfitter.com to contact the GM Upfitter Integration Group for assistance. If equipped, this feature allows for manual cleaning/regeneration of the Diesel Particulate Filter (DPF) when it is unable to clean itself. It may be necessary to perform a manual regeneration if driving conditions — such as extended slow speed, stop-and-go traffic, extended idles, short drive cycles, or stationary PTO operation — prevent DPF self-cleaning. 83 Manual regeneration can only be used when the DPF has become at least 90% full. At 100% full, it will attempt to automatically self-clean if proper driving conditions are met. The DPF will clean itself if the vehicle can be driven above 50 km/h (30 mph) for about 30 minutes. Manual regeneration can be used during a stationary PTO session. However it is strongly recommended that the exhaust filter be cleaned before continuous PTO. If manual regeneration is operating concurrently with PTO then the PTO system will retain control of the engine speed. Low PTO engine speeds will cause regeneration to take longer. To initiate a manual DPF regeneration, see “Manual Regeneration of Diesel Particulate Filter” under Diesel Particulate Filter. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 84 Vehicle Care Vehicle Care General Information General Information Accessories and Modifications Accessories and Modifications . . . . . . . . . . . . . . . . . 84 Vehicle Checks Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . . 86 Engine Oil . . . . . . . . . . . . . . . . . . . . . 91 Engine Oil Life System . . . . . . . . 95 Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . . 95 Engine Air Cleaner/Filter . . . . . . . 99 Cooling System . . . . . . . . . . . . . . 102 Engine Overheating . . . . . . . . . . 106 Battery (4-Cylinder Pickup Only) . . . . . . . . . . . . . . . . 107 Electrical System Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 108 Appearance Care Exterior Care . . . . . . . . . . . . . . . . . 119 Adding non-dealer accessories or making modifications to the vehicle can affect vehicle performance and safety, including such things as airbags, braking, stability, ride and handling, emissions systems, aerodynamics, durability, and electronic systems like antilock brakes, traction control, and stability control. These accessories or modifications could even cause malfunction or damage not covered by the vehicle warranty. Damage to vehicle components resulting from modifications or the installation or use of non-GM certified parts, including control module or software modifications, is not covered under the terms of the vehicle warranty and may affect remaining warranty coverage for affected parts. GM Accessories are designed to complement and function with other systems on the vehicle. See your dealer to accessorize the vehicle using genuine GM Accessories installed by a dealer technician. See the warranty manual. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care Aftermarket Engine Performance Enhancement Products and Modifications Some aftermarket engine performance products and modifications promise a way to increase the horsepower and torque levels of the vehicle's powertrain. You should be aware that these products could have harmful effects on the performance and life of the engine, exhaust emission system, transmission, and drivetrain. The engines, transmissions, and drivetrains have been designed and built to offer industry leading durability and performance in the most demanding applications. Engine power enhancement products may enable the engine to operate at horsepower and torque levels that could damage, create failure, or reduce the life of the engine, engine emission system, transmission, and drivetrain. Damage, failure, or reduced life of the engine, transmission, emission system, drivetrain, or other vehicle components caused by aftermarket engine performance enhancement products or modifications might not be covered under the vehicle warranty. 85 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 86 Vehicle Care Vehicle Checks Engine Compartment Overview 2.8L 4-Cylinder Engine Pickup Models Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care 1. Coolant Surge Tank and Pressure Cap 4. Engine Fan (Out of View) 7. Brake Fluid Reservoir 5. Engine Oil Dipstick 2. Engine Air Cleaner/Filter 6. Engine Compartment Fuse Block 8. Windshield Washer Fluid Reservoir 3. Engine Oil Fill Cap 9. Battery 87 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 88 Vehicle Care 6.6L 8-Cylinder Engine Pickup Models Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care 1. Battery 6. Engine Fan (Out of View) 2. Engine Air Cleaner/Filter 7. Automatic Transmission Dipstick 3. Coolant Surge Tank and Pressure Cap 4. Remote Positive (+) Terminal 5. Diesel Exhaust Fluid (DEF) Fill Tube 8. Engine Oil Fill Cap 9. Power Steering Fluid Reservoir 10. Engine Oil Dipstick 11. Brake Fluid Reservoir 89 12. Windshield Washer Fluid Reservoir 13. Auxiliary Battery 14. Engine Compartment Fuse Block 15. Remote Negative (-) Terminal Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 90 Vehicle Care 2.8L 4-Cylinder Engine Van Models Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care 1. Battery . 2. Coolant Surge Tank and Pressure Cap 3. Engine Fan (Out of View) 4. Engine Oil Fill Cap . Change the engine oil at the appropriate time. See “Engine Oil Life System” in the owner’s manual. . Always dispose of engine oil properly. See “What to Do with Used Oil” in this section. 5. Engine Oil Dipstick 6. Engine Air Cleaner/Filter 7. Engine Compartment Fuse Box 8. Power Steering Fluid Reservoir 9. Brake Fluid Reservoir 10. Windshield Washer Fluid Reservoir Engine Oil To ensure proper engine performance and long life, careful attention must be paid to engine oil. Following these simple, but important steps will help protect your investment: . Use engine oil approved to the proper specification and of the proper viscosity grade. See “Selecting the Right Engine Oil” in this section. Check the engine oil level regularly and maintain the proper oil level. See “Checking Engine Oil” and “When to Add Engine Oil” in this section. Checking Engine Oil Check the engine oil level regularly, every 650 km (400 mi), especially prior to a long trip. The engine oil dipstick handle is a loop. See Engine Compartment Overview 0 86 for the location. { Warning The engine oil dipstick handle may be hot; it could burn you. Use a towel or glove to touch the dipstick handle. 91 If a low oil Driver Information Center (DIC) message displays, check the oil level. Follow these guidelines: . To get an accurate reading, park the vehicle on level ground. Check the engine oil level after the engine has been off for at least two hours. Checking the engine oil level on steep grades or too soon after engine shutoff can result in incorrect readings. Accuracy improves when checking a cold engine prior to starting. Remove the dipstick and check the level. . If unable to wait two hours, the engine must be off for at least 15 minutes if the engine is warm, or at least 30 minutes if the engine is not warm. Pull out the dipstick, wipe it with a clean paper towel or cloth, then push it back in all the way. Remove it again, keeping the tip down, and check the level. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 92 Vehicle Care When to Add Engine Oil If the oil is below the cross-hatched area at the tip of the dipstick and the engine has been off for at least 15 minutes, add 1 L (1 qt) of the recommended oil and then recheck the level. See “Selecting the Right Engine Oil” later in this section for an explanation of what kind of oil to use. For engine oil crankcase capacity, see Capacities and Specifications 0 131. Caution Do not add too much oil. Oil levels above or below the acceptable operating range shown on the dipstick are harmful to the engine. If you find that you (Continued) Caution (Continued) have an oil level above the operating range, i.e., the engine has so much oil that the oil level gets above the cross-hatched area that shows the proper operating range, the engine could be damaged. You should drain out the excess oil or limit driving of the vehicle and seek a service professional to remove the excess amount of oil. See Engine Compartment Overview 0 86 for the location of the engine oil fill cap. Be sure to add enough oil to put the level somewhere in the proper operating range. Push the dipstick all the way back in when through. Selecting the Right Engine Oil (2.8L 4-Cylinder Engine) Selecting the right engine oil depends on both the proper oil specification and viscosity grade. See Recommended Fluids and Lubricants 0 126. Specification Ask for and use engine oils that meet the dexos2 specification. Engine oils that have been approved by GM as meeting the dexos2 specification are marked with the dexos2 approved logo. See www.gmdexos.com. Use of Substitute Engine Oils if dexos2 is unavailable: In the event that dexos2-approved engine oil is not available at an oil change or for maintaining proper oil level, you may use substitute engine oil that meets ACEA C3 of the appropriate viscosity grade. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care 93 will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, it is recommended to select an oil of the correct specification. See “Specification” earlier in this section. Caution Engine Oil Additives/Engine Oil Flushes — dexos2 Failure to use the recommended engine oil or equivalent can result in engine damage not covered by the vehicle warranty. Do not add anything to the oil. The recommended oils meeting the dexos2 specification are all that is needed for good performance and engine protection. Viscosity Grade Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty. Use SAE 5W-30 viscosity grade engine oil. Selecting the Right Engine Oil (6.6L 8-Cylinder Engine) Specification Cold Temperature Operation: In an area of extreme cold, where the temperature falls below −29 °C (−20 °F), an SAE 0W-40 oil may be used. An oil of this viscosity grade Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 94 Vehicle Care designations, such as API CJ-4/SL. These letters show API levels of quality. Look for this on the oil container, and use only those oils that display this logo. Caution Use only engine oils that have the designation CJ-4 for the diesel engine. Failure to use the recommended oil can damage the DPF and result in engine damage not covered by the vehicle warranty. Viscosity Grade American Petroleum Institute (API) Symbol Use SAE 15W-40 viscosity grade engine oil. This doughnut-shaped logo (symbol) is used on most oil containers to help you select the correct oil. It means that the oil has been certified by the American Petroleum Institute. When it is very cold, below −18 °C (0 °F), use SAE 5W-40 to improve cold starting. These numbers on the oil container show its viscosity, or thickness. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care When selecting an oil of the appropriate viscosity grade, always select an oil of the correct specification. See “Specification” earlier in this section. Engine Oil Additives/Engine Oil Flushes — API Do not add anything to the oil. The recommended oils with the API service symbol are all that is needed for good performance and engine protection. Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty. What to Do with Used Oil Used engine oil contains certain elements that can be unhealthy for your skin and could even cause cancer. Do not let used oil stay on your skin for very long. Clean your skin and nails with soap and water, or a good hand cleaner. Wash or properly dispose of clothing or rags 95 containing used engine oil. See the manufacturer's warnings about the use and disposal of oil products. Automatic Transmission Fluid Used oil can be a threat to the environment. If you change your own oil, be sure to drain all the oil from the filter before disposal. Never dispose of oil by putting it in the trash or pouring it on the ground, into sewers, or into streams or bodies of water. Recycle it by taking it to a place that collects used oil. When to Check and Change (2.8L 4-Cylinder Engine Pickup Models) Engine Oil Life System Change the fluid and filter at the intervals listed. See Maintenance Schedule 0 122. The engine oil life system calculates engine oil life based on vehicle use and displays the CHANGE ENGINE OIL SOON message when it is time to change the engine oil and filter. The oil life system should be reset to 100% only following an oil change. See “Engine Oil Life System” in the owner’s manual. See “Automatic Transmission Fluid” in the owner’s manual. When to Check and Change (6.6L 8-Cylinder Engine Pickup Models) Use the transmission fluid listed in Recommended Fluids and Lubricants 0 126. How to Check Because this operation can be a little difficult, the decision may be made to have this done by your dealer. If the decision is made to perform this operation, be sure to follow all the instructions here, or a false reading on the dipstick could result. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 96 Vehicle Care Caution Too much or too little fluid can damage the transmission. Too much can mean that some of the fluid could come out and fall on hot engine parts or exhaust system parts, starting a fire. Too little fluid could cause the transmission to overheat. Be sure to get an accurate reading if checking the transmission fluid. Wait at least 30 minutes before checking the transmission fluid level if the vehicle has been driven: . When outside temperatures are above 32 °C (90 °F). . At high speed for quite a while. . In heavy traffic — especially in hot weather. . While pulling a trailer. Checking the Fluid Level Prepare the vehicle as follows: 1. Park the vehicle on a level place. Keep the engine running. Then, without shutting off the engine, follow these steps: Cold Check Procedure 2. With the parking brake applied, place the shift lever in P (Park). 3. With a foot on the brake pedal, run the engine for at least one minute and shift to D (Drive). Then shift to N (Neutral) and then R (Reverse) to fill the hydraulic system. Then, put the shift lever in P (Park). 4. Allow the engine to run at idle (500 – 800 rpm). Slowly release the brake pedal. The purpose of the cold check is to determine if the transmission has enough fluid to be operated safely until a hot check can be made. The fluid level rises as fluid temperature increases. DO NOT fill above the COLD band if the transmission fluid is below normal operating temperatures. 1. Pull out the dipstick and wipe it with a clean rag or paper towel. The transmission dipstick is near the center of the engine compartment. See Engine Compartment Overview 0 86 for location. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care 2. Push it back in all the way, wait three seconds, and then pull it back out again. 3. Check the fluid level reading. Repeat the check procedure to verify the reading. 4. If the fluid level is within the COLD band, the transmission may be operated until the fluid is hot enough to perform a hot check. If the fluid level is not within the COLD band, add or drain fluid as necessary to bring the level into the middle of the COLD band. 5. Perform a hot check at the first opportunity after the normal operating temperature of 71 °C (160 °F) to 93 °C (200 °F) is reached. 6. If the fluid level is in the acceptable range, push the dipstick back in all the way. Hot Check Procedure The fluid must be hot to ensure an accurate check. The fluid level rises as temperature increases. 1. Operate the transmission in D (Drive) until the normal operating temperature of 71 °C (160 °F) to 93 °C (200 °F) is reached. 2. Pull out the dipstick and wipe it with a clean rag or paper towel. 3. Push it back in all the way, wait three seconds, and then pull it back out again. Repeat the check procedure to verify the reading. 4. Safe operating level is within the HOT band on the dipstick. The width of the HOT band represents approximately 1.0 L (1.06 qt) of fluid at normal operating temperature. 5. If the fluid level is not within the HOT band, add or drain fluid as necessary to bring the fluid level to within the HOT band. 6. If the fluid level is in the acceptable range, push the dipstick back in all the way. 97 Consistency of Readings Always check the fluid level at least twice using the procedures described previously. Consistency is important to maintaining proper fluid level. If inconsistent readings persist, check the transmission breather to be sure it is clean and unclogged. If readings are still inconsistent, contact your dealer. What Transmission Fluid to Use Cold Operation When temperatures are very cold, the transmission will prevent certain operations to protect against damage. The information below shows shift range availability based on transmission oil temperatures: . All shift ranges available at −25 °C (−13 °F) or above. . 2 (Second) and 3 (Third) shift ranges only at −35 °C (−31 °F) to −25 °C (−13 °F). . 2 (Second) shift range only at −35 °C (−31 °F) or lower. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 98 Vehicle Care Torque converter clutch operation will also be prevented when air or transmission oil temperatures are below certain levels. Transmission shifting might be firmer with a cold transmission. This difference in shift quality is normal. 2. For areas where ambient temperatures fall below −40 °C (−40 °F), synthetic transmission fluid should be used. See Recommended Fluids and Lubricants 0 126. The synthetic transmission fluid can be used for all temperature ranges. Caution Use of the incorrect automatic transmission fluid may damage the vehicle, and the damage may not be covered by the vehicle warranty. Always use the automatic transmission fluid listed in Recommended Fluids and Lubricants 0 126. How to Add Fluid See Recommended Fluids and Lubricants 0 126 to determine what kind of transmission fluid to use. 1. For areas where ambient temperatures stay above −40 °C (−40 °F), regular transmission fluid can be used. See Recommended Fluids and Lubricants 0 126. Add fluid only after checking the transmission fluid while it is hot. A cold check is used only as a reference. If the fluid level is low, add only enough of the proper fluid to bring the level up to the HOT area for a hot check. It does not take much fluid, generally less than 0.5 L (1 pt). Do not overfill. . After adding fluid, recheck the fluid level as described under “How to Check” previously in this section. . When the correct fluid level is obtained, push the dipstick back in all the way. When to Check and Change (2.8L 4-Cylinder Engine Van Models) It is not necessary to check the transmission fluid level. A transmission fluid leak is the only reason for fluid loss. If a leak Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care occurs, take the vehicle to your dealer and have it repaired as soon as possible. There is a special procedure for checking and changing the transmission fluid. Because this procedure is difficult, this should be done at your dealer. Contact your dealer for additional information. Change the fluid and filter at the intervals listed in Maintenance Schedule 0 122, and be sure to use the fluid listed in Recommended Fluids and Lubricants 0 126. Engine Air Cleaner/Filter 2.8L 4-Cylinder Engine Pickup Models See “Engine Air Cleaner/Filter” in the owner’s manual. 6.6L 8-Cylinder Engine Pickup Models The air cleaner/filter assembly is on the front corner of the engine compartment on the passenger side of the vehicle. See Engine Compartment Overview 0 86. When to Inspect the Engine Air Cleaner/Filter For intervals on changing and inspecting the engine air filter, see Maintenance Schedule 0 122. How to Inspect the Engine Air Cleaner/Filter Do not start the engine or have the engine running with the engine air filter housing open. Before removing the engine air filter, make sure that the engine air filter housing and nearby components are free of dirt and debris. Remove the engine air filter. Lightly tap and shake the engine air filter (away from the vehicle) to release dust and dirt. Inspect the engine air filter for damage, and replace if damaged. Do not clean the engine air filter or components with water or compressed air. When changing the air filter, remove the dust valve from the front intake air duct and clean out any debris if necessary. 99 Caution Water sprayed into or on the air intake box in the engine compartment may damage the air filter or electrical components. Do not spray water into or on the air intake box. 1. 2. 3. 4. 5. Housing Base Screws Housing Cover Electrical Connector Clamps Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 100 Vehicle Care 11. Move the air duct in place and tighten the two clamp screws. To inspect and replace the filter: 1. Disconnect the wiring harness electrical connector (4) from the air cleaner/filter housing cover (3). 12. Reinstall the wiring harness electrical connector. See Maintenance Schedule 0 122 to determine when to replace the engine air cleaner/filter. 2. Loosen the screws on the clamps (5) holding the air outlet duct in place. Do not remove the clamps. Move the air duct aside. 3. Remove the two screws (2) from the housing cover. 4. Raise the housing cover. Take care not to move the air cleaner/filter housing base (1), to avoid any air leaks. 5. Remove the air cleaner/filter from the housing base. Take care to dislodge as little dirt as possible. { Warning 6. Turn the dust valve counterclockwise to remove from the front intake air duct. Check it for debris and clean out if necessary. 7. Turn the dust valve clockwise to reinstall. 8. Clean the air cleaner/filter sealing surface and the housing base. 9. Install the engine air cleaner/ filter. 10. Lower the air cleaner/filter housing cover and secure with the two screws. Operating the engine with the air cleaner/filter off can cause you or others to be burned. The air cleaner not only cleans the air; it helps to stop flames if the engine backfires. Use caution when working on the engine and do not drive with the air cleaner/filter off. Caution If the air cleaner/filter is off, dirt can easily get into the engine, which could damage it. Always have the air cleaner/filter in place when driving. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care 2.8L 4-Cylinder Engine Van Models The air cleaner/filter assembly is on the front of the engine compartment on the driver side of the vehicle. See Engine Compartment Overview 0 86. Do not clean the engine air filter or components with water or compressed air. 2. Unlock the two retaining clips (2) on the sides of the housing cover (4) and on the housing base and pull the cover off. 3. Remove the air cleaner/filter from the housing base. Take care to dislodge as little dirt as possible. When to Inspect the Engine Air Cleaner/Filter 4. Clean the air cleaner/filter sealing surface and housing base. For intervals on changing and inspecting the engine air filter, see Maintenance Schedule 0 122. How to Inspect the Engine Air Cleaner/Filter Do not start the engine or have the engine running with the engine air filter housing open. Before removing the engine air filter, make sure that the engine air filter housing and nearby components are free of dirt and debris. Remove the engine air filter. Lightly tap and shake the engine air filter (away from the vehicle) to release dust and dirt. Inspect the engine air filter for damage, and replace if damaged. 101 1. 2. 3. 4. 5. Screws Retaining Clips Housing Base Housing Cover Turbo Air Duct To inspect and replace the filter: 1. Remove the two screws (1) and lift the air cleaner/filter housing base (3) to clear the turbo air duct (5). 5. Install the engine air cleaner/ filter by aligning the arrow on one side of the air cleaner/filter end cap with the arrow on top of the housing base. 6. Reinstall the housing cover by aligning the arrow on top of the cover to the arrow on top of the housing base, and fasten the two retaining clips. 7. Align the two bushings under the housing base to the guide pins below on the closure assembly and push the housing base into place. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 102 Vehicle Care 8. Reinstall the two screws to secure the housing base. See Maintenance Schedule 0 122 to determine when to replace the engine air cleaner/filter. { Warning Operating the engine with the air cleaner/filter off can cause you or others to be burned. The air cleaner not only cleans the air; it helps to stop flames if the engine backfires. Use caution when working on the engine and do not drive with the air cleaner/filter off. Cooling System The cooling system allows the engine to maintain the correct working temperature. 2.8L 4-Cylinder Engine Van Models 2.8L 4-Cylinder Engine Pickup Models See “Cooling System” in the owner’s manual. 6.6L 8-Cylinder Engine Pickup Models 1. Coolant Surge Tank 2. Coolant Surge Tank Pressure Cap 3. Engine Cooling Fan (Out of View) Caution If the air cleaner/filter is off, dirt can easily get into the engine, which could damage it. Always have the air cleaner/filter in place when driving. 3. Engine Cooling Fan (Out of View) 1. Coolant Surge Tank 2. Coolant Surge Tank Pressure Cap Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care { Warning An underhood electric fan can start up even when the engine is not running and can cause injury. Keep hands, clothing, and tools away from any underhood electric fan. { Warning Do not touch heater or radiator hoses, or other engine parts. They can be very hot and can burn you. Do not run the engine if there is a leak; all coolant could leak out. That could cause an engine fire and can burn you. Fix any leak before driving the vehicle. Engine Coolant The cooling system in the vehicle is filled with DEX-COOL engine coolant mixture. See Recommended Fluids and Lubricants 0 126 and Maintenance Schedule 0 122. The following explains the cooling system and how to add coolant when it is low. If there is a problem with engine overheating, see Engine Overheating 0 106. A 50/50 mixture of clean, drinkable water and DEX-COOL coolant will: . Give freezing protection down to −37 °C (−34 °F). . Give boiling protection up to 129 °C (265 °F). . Protect against rust and corrosion. . Help keep the proper engine temperature. . Let the warning lights and gauges work as they should. 103 What to Use { Warning Plain water, or other liquids such as alcohol, can boil before the proper coolant mixture will. With plain water or the wrong mixture, the engine could get too hot but there would not be an overheat warning. The engine could catch fire and you or others could be burned. Use a 50/50 mixture of clean, drinkable water and DEX-COOL coolant which will not damage aluminum parts. If using this mixture, nothing else needs to be added. If coolant has to be added more than four times a year, have your dealer check the vehicle cooling system. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 104 Vehicle Care Caution Checking Coolant (6.6L 8-Cylinder Engine Pickup Models) Checking Coolant (2.8L 4-Cylinder Engine Van Models) The coolant surge tank is in the engine compartment on the passenger side of the vehicle. See Engine Compartment Overview 0 86 for location. The coolant surge tank is near the center of the engine compartment. See Engine Compartment Overview 0 86 for location. Do not use anything other than a mix of DEX-COOL coolant that meets GM Standard GMW3420 and clean, drinkable water. Anything else can cause damage to the engine cooling system and the vehicle, which would not be covered by the vehicle warranty. Never dispose of engine coolant by putting it in the trash, or by pouring it on the ground or into sewers, streams, or bodies of water. Have the coolant changed by an authorized service center, familiar with legal requirements regarding used coolant disposal. This will help protect the environment and your health. Checking Coolant (2.8L 4-Cylinder Engine Pickup Models) See “Engine Coolant” in the owner’s manual. The coolant surge tank is divided into two sides. The upper should be filled to the indicated mark. The lower portion will be mostly empty, depending on the operating temperature. The vehicle must be on a level surface. When the engine is cold, the coolant level should be at the indicated mark. Adding Coolant (2.8L 4-Cylinder Engine Pickup Models) See “Engine Coolant” in the owner’s manual. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care Adding Coolant (2.8L 4-Cylinder Engine Van and 6.6L 8-Cylinder Engine Pickup Models) Caution If coolant is changed or added, always add enough to fill the system completely or engine damage may occur. If more coolant is needed, add the proper DEX-COOL coolant mixture at the surge tank, but be careful not to spill it. { Warning Steam and scalding liquids from a hot cooling system are under pressure. Turning the pressure cap, even a little, can cause them to come out at high speed and you could be burned. Never turn the cap when the cooling system, including the pressure cap, is hot. Wait for the cooling system and pressure cap to cool. If no coolant is visible in the surge tank, add coolant as follows: 105 surge tank pressure cap and upper radiator hose, is no longer hot. For 8-cylinder pickups, turn the pressure cap slowly clockwise about one-half turn. If a hiss is heard, wait for that to stop. A hiss means there is still some pressure left. For vans, turn the pressure cap slowly counterclockwise about one full turn. If a hiss is heard, wait for that to stop. A hiss means there is still some pressure left. { Warning 2. Keep turning the pressure cap slowly, and remove it. Spilling coolant on hot engine parts can burn you. Coolant contains ethylene glycol and it will burn if the engine parts are hot enough. 3. Slowly fill the coolant surge tank. Do not let the coolant level go above the indicated mark in the tank until after the engine comes to operating temperature in Step 4. 6.6L 8-Cylinder Pickup Pressure Cap 2.8L 4-Cylinder Van Pressure Cap 1. Remove the coolant surge tank pressure cap when the cooling system, including the coolant 4. With the coolant surge tank pressure cap off, start the engine and let it run until the Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 106 Vehicle Care engine coolant temperature gauge indicates approximately 90 °C (195 °F). By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower, slowly add more of the proper mixture to the coolant surge tank until it reaches the indicated mark. 5. Replace the pressure cap. For 8-cylinder pickups, be sure the pressure cap is locked. For vans, be sure the pressure cap is hand-tight and fully seated. 6. Verify coolant level after the engine is shut off and the coolant is cold. If necessary, repeat coolant fill procedure Steps 1–6. If the coolant level is still low after having followed these steps twice, have the coolant system checked by a certified technician at the dealer for a possible leak. Caution Warning (Continued) If the pressure cap is not tightly installed, coolant loss and engine damage may occur. Be sure the cap is properly and tightly secured. including the pressure cap, is hot. Wait for the cooling system and pressure cap to cool. Engine Overheating There is an engine coolant temperature gauge on the instrument cluster. See the owner’s manual. If Steam Is Coming from the Engine Compartment { Warning Steam and scalding liquids from a hot cooling system are under pressure. Turning the pressure cap, even a little, can cause them to come out at high speed and you could be burned. Never turn the cap when the cooling system, (Continued) Caution Do not run the engine if there is a leak in the engine cooling system. This can cause a loss of all coolant and can damage the system and vehicle. Have any leaks fixed right away. If No Steam Is Coming from the Engine Compartment A Driver Information Center (DIC) message, along with a low coolant condition, can indicate a serious problem. If there is an engine overheat warning and the vehicle does not have a low coolant condition, and no steam is heard or seen, the Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care problem may not be too serious. Sometimes the engine can get a little too hot when the vehicle: 8. Climbs a long hill on a hot day. . Stops after high-speed driving. . Idles for long periods in traffic. . Tows a trailer. See “Driving on Grades” under “Driving Characteristics and Towing Tips” in the owner’s manual. If the DIC message comes on with no sign of steam, try this for a minute or so: 1. In heavy traffic, let the engine idle in N (Neutral) while stopped. If it is safe to do so, pull off the road, shift to P (Park) or N (Neutral), and let the engine idle. 2. Turn on the heater to full hot at the highest fan speed and open the window as necessary. If the vehicle no longer has the overheat warning, the vehicle can be driven. Just to be safe, drive slower for about 10 minutes. If the warning does not come back on, drive normally and have the cooling system checked for proper fill and function. If the warning continues, pull over, stop, and park the vehicle right away. If there is still no sign of steam and the vehicle is equipped with an engine driven cooling fan, push down the accelerator until the engine speed is about twice as fast as normal idle speed for at least five minutes while the vehicle is parked. If the warning is still there, turn off the engine and get everyone out of the vehicle until it cools down. 107 8-Cylinder Pickup Only If the Action Required - Idle Vehicle To Cool Engine DIC message displays, do not turn the engine off. Keep the engine running until the message goes away. Battery (4-Cylinder Pickup Only) Pickups with a 4-cylinder diesel engine are equipped with an AGM (Absorbing Glass Mat) 12-volt battery. Installation of a standard 12-volt battery will result in reduced cold cranking performance. When using a battery charger on the AGM battery, use the AGM setting on the charger, if available, to limit charge voltage to 14.8 volts. Follow the charger manufacturer's instructions. See “Battery - North America” in the owner’s manual. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 108 Vehicle Care Electrical System Engine Compartment Fuse Block For additional fuse and electrical information, see “Electrical System” in the owner’s manual. The engine compartment fuse block is in the engine compartment, on the driver side of the vehicle. Lift the cover to access the fuse block. Caution Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component. A fuse puller is available inside this fuse block. { Danger Fuses and circuit breakers are marked with their ampere rating. Do not exceed the specified amperage rating when replacing fuses and circuit breakers. Use of an oversized fuse or circuit breaker can result in a vehicle fire. You and others could be seriously injured or killed. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care 4-Cylinder Pickup 109 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 110 Vehicle Care The vehicle may not be equipped with all of the fuses, relays, and features shown. Fuses Usage F1 Traction control module power F2 Engine control module power F3 F4 F5 Air conditioning clutch NOx sensors/ Exhaust particulate sensors Engine control module/Integrated chassis control module/Water in fuel sensor Fuses Usage Fuses Usage F10 Engine control module-injectors F26 Antilock brake system pump F11 Mass air flow sensor F27 Trailer brake control module F12 Starter F28 F13 Traction control module Rear window defogger F29 – F14 – F30 Driver heated seat F15 – F31 – F16 – F32 F17 Front axle actuator passenger heated seat F18 – F33 Body control module 3 F34 Integrated chassis control module F19 – F20 Fuel pump F6 Front wipers F21 Front blower F35 – F7 Cargo lamp F22 F36 F8 Engine control module miscellaneous Antilock brake system valves F23 – Center high-mounted stoplamp F24 Trailer F37 Engine control module F25 Transfer case electronic control Right high-beam headlamp F38 Left high-beam headlamp F9 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care Fuses Usage Fuses Usage Fuses 111 Usage F39 Rear differential lock actuators F52 – F68 – F53 – F69 F40 Front differential lock actuators F54 – Battery regulated voltage control F55 – F70 – F56 Washer pump F71 – F57 – F72 – F58 – F73 – F59 – F74 Generator F60 Mirror defogger F75 – F61 – F62 Selective catalytic reduction power module F63 – F64 Selective catalytic reduction power module wake up Trailer reverse lamps F65 Trailer parking lamps F66 F41 Glow plug module F42 – F43 – F44 Fuel heater F45 Selective catalytic reduction power module heater F46 Cooling fan clutch F47 Heater crankcase ventilation F48 Fog lamps (if equipped) F49 F50 F51 Horn F67 Relays Usage K1 Air conditioning clutch K2 Starter K3 Powertrain sensor K4 Wiper speed Left trailer stoplamp/Turnlamp K5 Wiper control K6 Cargo lamp Right trailer stoplamp/Turnlamp K7 Powertrain K8 Fuel pump Electric power steering Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 112 Vehicle Care Relays Usage K9 Front differential lock actuators K10 Rear differential lock actuators K11 Center high-mounted stoplamp K12 Fuel heater K13 Selective catalytic reduction power module heater control K14 Trailer parking lamps K15 Run/Crank K16 Cooling fan clutch K17 Rear window defogger/Mirror defogger Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care 4-Cylinder Van 113 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 114 Vehicle Care The vehicle may not be equipped with all of the fuses, relays, and features shown. Fuses Usage Fuses Usage Fuses Usage 13 Display/Mirrors/ Rear vision camera 27 Special equipment option 14 Washer 28 Airbag 16 Horn 29 Antilock brake system module 17 Transmission Steering wheel sensor 18 Air conditioning 30 3 Right trailer stoplamp/Turnlamp 19 Engine control module battery Engine control module/Glow plug module/Ignition 4 – 20 31 5 – Cutaway/Left stoplamp/Turnlamp Transmission control module/ Ignition 6 Fuel system control module/Ignition 21 Left trailer stoplamp/Turnlamp 32 7 Body control module 5 22 Cutaway/Right stoplamp/Turnlamp Transmission control module battery 33 Obstacle detection 8 Body control module 7 23 NOx sensors 34 NOx sensors 24 Gas fuel pump/ Diesel fuel pump 35 Fuel operated heater module 25 Auxiliary power outlet 36 Fuel system control module battery 26 Body control module 3 37 – 1 2 Antilock brake system motor 9 Body control module 4 10 Instrument cluster 11 Trailer wiring 12 – Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care 115 Fuses Usage Fuses 41 T87A Transmission control module battery 58 Body control module 2 71 Fuel heater/Flex fuel sensor 59 Trailer wiring Body control module 1 72 42 Body control module 6 43 EV fan clutch 61 Starter solenoid Crankcase vent heater 73 44 Lighter/Data link connector 45 Engine control module/Powertrain 62 O2 sensor 2/EV fan 74 Front blower 63 – 75 Fuel Injectors 46 AC DC inverter 64 Soot sensor Cooling fan–low Mass airflow sensor/Canister vent/Humidity sensor 76 47 77 O2 sensor 1/ Cluster 78 Engine control module/Powertrain 79 Ignition/ Injectors–even Usage 50 – 51 Left high-beam headlamp 65 Ignition/ Injectors–odd 52 RIght high-beam headlamp 66 Daytime running lamps 2 53 Left low-beam headamp 67 Daytime running lamps 1–uplevel Right low-beam headlamp 68 Auxiliary stoplamps 69 Trailer power extension 70 Upfitter stoplamps 54 55 Wipers 56 Canister vent solenoid Fuses Usage Relays Usage 15 Run/Crank 37 NOx sensors 38 Fuel pump 39 Crank 40 Air conditioning Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 116 Vehicle Care Relays Usage Auxiliary Fuse Block Relays Usage 48 EV fan clutch MR Rel 1 Fuel filter heater 49 Powertrain MR Rel 2 57 Cooling fan–low Diesel exhaust fluid power/Wake up 60 Cooling fan control Mega Fuse Holder K3 Wipers–high K5 Horn/Washer K6 Low-beam headlamps To check the fuse release the yellow clamps on both sides and pull off the cover. K7 High-beam headlamps K9 Left trailer stoplamp/Turnlamp The vehicle may not be equipped with all of the fuses, relays, and features shown. Fuses Usage K11 Stoplamps K13 Wipers MR-1 Fuel filter heater K18 Right trailer stoplamp/Turnlamp MR-2 Diesel exhaust fluid power K19 Daytime running lamps MR-3 Diesel exhaust fluid wake up Fuse 1 Usage Starter motor Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care 8-Cylinder Pickup The vehicle may not be equipped with all of the fuses, relays, and features shown. Fuses Fuses 1 Usage Trailer brake 117 Usage 2 Trailer battery 3 Antilock brake system pump 4 Instrument panel BEC 1 5 Passenger motorized seat belt 6 4WD transfer case electronic control 7 Electric parking brake 8 Instrument panel BEC 2 9 Driver motorized seat belt 10 Rear window defogger 11 Starter 12 Cooling fan 1 13 Cooling fan 2 14 Left trailer stop/ Turn lamps Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 118 Vehicle Care Fuses Usage Fuses Usage 44 Fuel injectors A–odd 45 Fuel injectors B–even Upfitter 4 46 Afterboil Reverse lamps 47 Throttle control 34 Engine control module/Ignition 48 Horn 49 Fog lamps 35 Air conditioning clutch 50 O2 Sensor A 51 36 Heated mirrors Engine control module 37 Upfitter 1 52 Interior heater 38 Center high-mounted stoplamp 53 Police upfitter 54 Front washer 55 Air conditioning compressor module 56 Selective catalytic reduction power module/SEN ENB 28 Right parking lamps 16 Trailer reverse lamps 29 Left parking lamps 30 Upfitter 3 17 Right trailer stop/ Turn lamps 31 Upfitter 4 32 33 Fuel pump 19 Integrated chassis control module 20 Electronic suspension control/ Electronic level control/Exhaust 21 Fuel pump power module Usage Engine Trailer parking lamps 18 Fuses 43 15 22 Upfitter 1 23 Upfitter 2 24 Front wiper 39 25 Antilock brake system valves Miscellaneous/ Ignition 40 26 Upfitter 2 Transmission/ Ignition 27 Upfitter 3 41 Fuel pump 2 42 Cooling fan clutch Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Vehicle Care Fuses 57 Usage Transmission control module/ Engine control module 58 Headlamps 74 Electric running boards (if equipped) Relays Usage Trailer parking lamps Exterior Care 64 Run/Crank 65 Upfitter 1 See the owner’s manual for additional exterior care information. 66 Fuel pump 2 67 Air conditioning control 68 Starter 69 Rear window defogger 70 Engine control module Leveling/Exhaust solenoid 81 Diesel exhaust fluid heater 82 Fuel heater 84 Trailer interface module 71 Cooling fan clutch 72 CKT 95 85 Fuel heater 73 CKT 92 86 EURO trailer R/C 75 Fuel heater 78 Diesel exhaust fluid heater 79 PT sensor Usage 59 Fuel pump 60 Upfitter 2 61 Upfitter 3 62 Upfitter 4 Appearance Care 63 80 Relays 119 Caution Water sprayed into or on the air intake box in the engine compartment may damage the air filter or electrical components. Do not spray water into or on the air intake box. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 120 Service and Maintenance Service and Maintenance General Information General Information . . . . . . . . . . 120 Maintenance Schedule Maintenance Schedule . . . . . . . 122 Recommended Fluids, Lubricants, and Parts Recommended Fluids and Lubricants . . . . . . . . . . . . . . . . . . . 126 Maintenance Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . 127 Maintenance Records Maintenance Records . . . . . . . . 129 General Information This maintenance section applies to vehicles with a diesel engine. For gasoline engine vehicles, see the maintenance schedule section in the owner’s manual. Your vehicle is an important investment. This section describes the required maintenance for the vehicle. Follow this schedule to help protect against major repair expenses resulting from neglect or inadequate maintenance. It may also help to maintain the value of the vehicle if it is sold. It is the responsibility of the owner to have all required maintenance performed. Your dealer has trained technicians who can perform required maintenance using genuine replacement parts. They have up-to-date tools and equipment for fast and accurate diagnostics. Many dealers have extended evening and Saturday hours, courtesy transportation, and online scheduling to assist with service needs. Your dealer recognizes the importance of providing competitively priced maintenance and repair services. With trained technicians, your dealer is the place for routine maintenance such as oil changes and tire rotations and additional maintenance items like tires, brakes, batteries, and wiper blades. Caution Damage caused by improper maintenance can lead to costly repairs and may not be covered by the vehicle warranty. Maintenance intervals, checks, inspections, recommended fluids, and lubricants are important to keep the vehicle in good working condition. Do not have chemical flushes that are not approved by GM performed on the vehicle. The use of flushes, solvents, cleaners, or lubricants that are not (Continued) Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Service and Maintenance Caution (Continued) approved by GM could damage the vehicle, requiring expensive repairs that are not covered by the vehicle warranty. The Tire Rotation and Required Services are the responsibility of the vehicle owner. It is recommended to have your dealer perform these services every 12 000 km/7,500 mi. Proper vehicle maintenance helps to keep the vehicle in good working condition, improves fuel economy, and reduces vehicle emissions. Because of the way people use vehicles, maintenance needs vary. There may need to be more frequent checks and services. The Additional Required Services Normal are for vehicles that: . Carry passengers and cargo within recommended limits on the Tire and Loading Information label. See “Vehicle Load Limits” in the owner’s manual. . Are driven on reasonable road surfaces within legal driving limits. . Use the recommended fuel. See Fuel for Diesel Engines 0 45. Refer to the information in the Maintenance Schedule Additional Required Services - Normal chart. The Additional Required Services Severe are for vehicles that are: . Mainly driven in heavy city traffic in hot weather. . Mainly driven in hilly or mountainous terrain. . Frequently towing a trailer. . Used for high speed or competitive driving. . Used for taxi, police, or delivery service. Refer to the information in the Maintenance Schedule Additional Required Services - Severe chart. 121 { Warning Performing maintenance work can be dangerous and can cause serious injury. Perform maintenance work only if the required information, proper tools, and equipment are available. If they are not, see your dealer to have a trained technician do the work. See “Doing Your Own Service Work” in the owner’s manual. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 122 Service and Maintenance Maintenance Schedule Owner Checks and Services See the owner’s manual for other services and intervals that may be required. At Each Fuel Stop . Check the engine oil level. See Engine Oil 0 91. Engine Oil Change When the CHANGE ENGINE OIL SOON message displays, have the engine oil and filter changed within the next 1 000 km/600 mi. If driven under the best conditions, the engine oil life system may not indicate the need for vehicle service for up to a year. The engine oil and filter must be changed at least once a year and the oil life system must be reset. Your trained dealer technician can perform this work. If the engine oil life system is reset accidentally, service the vehicle within 5 000 km/3,000 mi since the last service. Reset the oil life system when the oil is changed. See Engine Oil Life System 0 95. Required Services Every 12 000 km/7,500 mi . Check engine oil level and oil life percentage. If needed, change engine oil and filter, and reset oil life system. See Engine Oil 0 91 and Engine Oil Life System 0 95. . Check engine coolant level. See Cooling System 0 102. . Visually check for fluid leaks. . Inspect engine air cleaner filter. See Engine Air Cleaner/Filter 0 99. . Visually inspect fuel system for damage or leaks. . Visually inspect exhaust system and nearby heat shields for loose or damaged parts. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 3 6 0 0 0 k m/2 2 ,5 0 0 mi 4 8 0 0 0 k m/3 0 ,0 0 0 mi 6 0 0 0 0 k m/3 7 ,5 0 0 mi 7 2 0 0 0 k m/4 5 ,0 0 0 mi 8 4 0 0 0 k m/5 2 ,5 0 0 mi 9 6 0 0 0 k m/6 0 ,0 0 0 mi 1 0 8 0 0 0 k m/6 7 ,5 0 0 mi 1 2 0 0 0 0 k m/7 5 ,0 0 0 mi 1 3 2 0 0 0 k m/8 2 ,5 0 0 mi 1 4 4 0 0 0 k m/9 0 ,0 0 0 mi 1 5 6 0 0 0 k m/9 7 ,5 0 0 mi 1 6 8 0 0 0 k m/1 0 5 ,0 0 0 mi 1 8 0 0 0 0 k m/11 2 ,5 0 0 mi 1 9 2 0 0 0 k m/1 2 0 ,0 0 0 mi 2 0 4 0 0 0 k m/1 2 7 ,5 0 0 mi 2 1 6 0 0 0 k m/1 3 5 ,0 0 0 mi 2 2 8 0 0 0 k m/1 4 2 ,5 0 0 mi 2 4 0 0 0 0 k m/1 5 0 ,0 0 0 mi Perform Required Services. Check engine oil level and oil life percentage. Change engine oil and filter, if needed. 2 4 0 0 0 k m/1 5 ,0 0 0 mi Maintenance Schedule Additional Required Services - Normal 123 1 2 0 0 0 k m/7 ,5 0 0 mi Service and Maintenance @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ Replace engine air cleaner filter. (1) @ Change automatic transmission fluid and filter. (HD 6-Speed Allison Transmission Only) @ @ Change automatic transmission external filter. (2500/3500 Pickup Only). @ @ Drain and fill engine cooling system. (2) @ Visually inspect accessory drive belts. (3) @ @ Replace timing belt. (2.8L 4-Cylinder Engine) Replace fuel filter. (8-Cylinder Pickup) (4) @ @ @ Replace fuel filter. (4-Cylinder Pickup) (4) Replace fuel filter. (Van) (4) @ @ @ @ @ @ @ @ @ @ @ @ Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 124 Service and Maintenance Footnotes — Maintenance Schedule Additional Required Services - Normal (2) Or every five years, whichever comes first. See Cooling System 0 102. (1) Or every four years, whichever comes first. If driving in dusty conditions, inspect the filter at each oil change or more often as needed. (3) Or every 10 years, whichever comes first. Inspect for fraying, excessive cracking, or damage; replace, if needed. (4) Or every two years, or when the CHANGE FUEL FILTER message in the Driver Information Center (DIC) comes on, whichever comes first. The fuel filter may need to be replaced more often based on biodiesel usage, driving in climates with severe dust, off-road driving, or towing a trailer for extended periods. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 3 6 0 0 0 k m/2 2 ,5 0 0 mi 4 8 0 0 0 k m/3 0 ,0 0 0 mi 6 0 0 0 0 k m/3 7 ,5 0 0 mi 7 2 0 0 0 k m/4 5 ,0 0 0 mi 8 4 0 0 0 k m/5 2 ,5 0 0 mi 9 6 0 0 0 k m/6 0 ,0 0 0 mi 1 0 8 0 0 0 k m/6 7 ,5 0 0 mi 1 2 0 0 0 0 k m/7 5 ,0 0 0 mi 1 3 2 0 0 0 k m/8 2 ,5 0 0 mi 1 4 4 0 0 0 k m/9 0 ,0 0 0 mi 1 5 6 0 0 0 k m/9 7 ,5 0 0 mi 1 6 8 0 0 0 k m/1 0 5 ,0 0 0 mi 1 8 0 0 0 0 k m/11 2 ,5 0 0 mi 1 9 2 0 0 0 k m/1 2 0 ,0 0 0 mi 2 0 4 0 0 0 k m/1 2 7 ,5 0 0 mi 2 1 6 0 0 0 k m/1 3 5 ,0 0 0 mi 2 2 8 0 0 0 k m/1 4 2 ,5 0 0 mi 2 4 0 0 0 0 k m/1 5 0 ,0 0 0 mi Perform Required Services. Check engine oil level and oil life percentage. Change engine oil and filter, if needed. 2 4 0 0 0 k m/1 5 ,0 0 0 mi Maintenance Schedule Additional Required Services - Severe 125 1 2 0 0 0 k m/7 ,5 0 0 mi Service and Maintenance @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ Replace engine air cleaner filter. (1) @ @ @ Change automatic transmission fluid and filter. @ @ @ Drain and fill engine cooling system. (2) @ Visually inspect accessory drive belts. (3) @ @ Replace timing belt. (2.8L 4-Cylinder Engine) Replace fuel filter. (8-Cylinder Pickup) (4) @ @ @ Replace fuel filter. (4-Cylinder Pickup) (4) Replace fuel filter. (Van) (4) @ @ @ @ @ Footnotes — Maintenance Schedule Additional Required Services - Severe (2) Or every five years, whichever comes first. See Cooling System 0 102. (1) Or every four years, whichever comes first. If driving in dusty conditions, inspect the filter at each oil change or more often as needed. (3) Or every 10 years, whichever comes first. Inspect for fraying, excessive cracking, or damage; replace, if needed. @ @ @ @ @ @ @ (4) Or every two years, or when the CHANGE FUEL FILTER message in the Driver Information Center (DIC) comes on, whichever comes first. The fuel filter may need to be replaced more often based on biodiesel usage, when driving in climates with excessive dust, or when off-road driving or towing a trailer for extended periods. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 126 Service and Maintenance Recommended Fluids, Lubricants, and Parts Recommended Fluids and Lubricants The following fluids apply to vehicles with a Duramax diesel engine and/or an Allison Transmission. For other fluids not listed here, see “Recommended Fluids and Lubricants” in the owner’s manual. Fluids and lubricants identified below by name, part number, or specification can be obtained from your dealer. Usage Fluid/Lubricant Automatic Transmission (Pickup) DEXRON-VI Automatic Transmission Fluid. Allison Transmission Only: For areas where ambient temperatures are below −40 °C (−40 °F) use Synthetic Transmission Fluid approved to Allison Transmission specification TES-295 (GM Part No. 12378515, in Canada 88900701). Automatic Transmission (Van) DEXRON-HP Automatic Transmission Fluid (GM Part No. 19331925, in Canada 19300537). Diesel Exhaust Aftertreatment System Diesel Exhaust Fluid (GM Part No. 19286291, in Canada 88865751) or Diesel Exhaust Fluid that meets ISO 22241-1 or displays the API Diesel Exhaust Fluid Certification Mark. Engine Coolant Engine Oil (2.8L 4-Cylinder Engine) 50/50 mixture of clean, drinkable water and use only DEX-COOL coolant. See Cooling System 0 102. Engine oil meeting the dexos2 specification of the proper SAE viscosity grade. ACDelco dexos2 is recommended. See Engine Oil 0 91. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Service and Maintenance Usage Fluid/Lubricant Engine Oil (6.6L 8-Cylinder Engine) Engine oils with the letters CJ-4 or CK-4 are required for your vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. To determine the preferred viscosity for your vehicle's diesel engine, see Engine Oil 0 91. Hydraulic Power Steering System (If Equipped) GM Power Steering Fluid (GM Part No. 19329450, in Canada 89021186). Maintenance Replacement Parts Replacement parts identified below by name, part number, or specification can be obtained from your dealer. Part GM Part Number ACDelco Part Number 4-Cylinder Pickup (LWN) 23248945 A3216C 8-Cylinder Pickup (L5P) 84262965 A3231C 4-Cylinder Van (LWN) 84000015 A3221C 4-Cylinder Pickup (LWN) 52100212 TP1007 8-Cylinder Pickup (L5P) 23304096 TP1015 4-Cylinder Van (LWN) 84186990 TP1016 Engine Air Cleaner/Filter Fuel Filter 127 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 128 Service and Maintenance Part GM Part Number ACDelco Part Number 4-Cylinder Engines (Van) 12677407 PF2267G 4-Cylinder Engines (Truck) 12679114 PF2262G 8-Cylinder Engines 88917036 PF2232 Engine Oil Filter Use only the specified filters. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Service and Maintenance 129 Maintenance Records After the scheduled services are performed, record the date, odometer reading, who performed the service, and the type of services performed in the boxes provided. Retain all maintenance receipts. Date Odometer Reading Serviced By Services Performed Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 130 Technical Data Technical Data Vehicle Data Capacities and Specifications . . . . . . . . . . . . . . . 131 Engine Drive Belt Routing . . . . 133 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Technical Data 131 Vehicle Data Capacities and Specifications The following approximate capacities are given in metric and English conversions. See Recommended Fluids and Lubricants 0 126. Capacities Application Metric English 2.8L 4-Cylinder Engine (LWN) 10.5 L 11.1 qt 6.6L 8-Cylinder Engine (L5P) 29.7 L 31.4 qt Front Heater Core without Fuel Operated Heater (FOH) 13.7 L 14.4 qt Front Heater Core with Fuel Operated Heater (FOH) 13.9 L 14.7 qt Front and Rear Heater Core without Fuel Operated Heater (FOH) 15.8 L 16.7 qt Front and Rear Heater Core with Fuel Operated Heater (FOH) 16.0 L 16.9 qt 2.8L 4-Cylinder Pickup Models (LWN) 20.4 L 5.4 gal 6.6L 8-Cylinder Pickup Models (L5P) 26.5 L 7.0 gal Cooling System (Pickup Models) Cooling System (2.8L 4-Cylinder Van Models) Diesel Exhaust Fluid (DEF) Tank* Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 132 Technical Data Capacities Application 2.8L 4-Cylinder Van Models (LWN) Metric English 21.0 L 5.5 gal Engine Oil with Filter 2.8L 4-Cylinder Engines 5.7 L 6.0 qt 6.6L 8-Cylinder Engines 9.5 L 10.0 qt 2.8L 4-Cylinder Engines 6.3 L 6.7 qt 6.6L 8-Cylinder Engines 7.0 L 7.4 qt Transmission Fluid (Pan Removal and Filter Replacement) *Do not overfill the DEF tank. See Diesel Exhaust Fluid 0 37. All quantities are approximate. When adding, be sure to fill to the appropriate level, as recommended in this manual. Recheck fluid level after filling. Engine Specifications Engine VIN Code Type 2.8L 4-Cylinder Turbo Diesel (LWN Engine) 1 L4 6.6L 8-Cylinder Turbo Diesel (L5P Engine) Y V8 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Technical Data Engine Drive Belt Routing 2.8L 4-Cylinder Engine (Pickup) 2.8L 4-Cylinder Engine (Van) 6.6L 8-Cylinder Engine (L5P Single Generator) 6.6L 8-Cylinder Engine (L5P Dual Generator) 133 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 134 Index Index A D Accessories and Modifications . . . 84 Air Cleaner/Filter, Engine . . . . . . . . 99 Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . .119 Automatic Transmission Fluid . . . . . . . . . . . . . 95 Diesel Starting Your Engine . . . . . . . . . . . . 24 Diesel Exhaust Fluid . . . . . . . . . . .7, 37 Diesel Exhaust Fluid (DEF) Warning Light . . . . . . . . . . . . . . . . . . 20 Diesel Particulate Filter . . . . . . . . . . 34 Drive Belt Routing, Engine . . . . . . 133 Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . 21 B Battery . . . . . . . . . . . . . . . . . . . . . . . . . 107 Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . 47 Brake Exhaust . . . . . . . . . . . . . . . . . . . . . . . . 44 C Canadian Vehicle Owners . . . . . . . . 2 Capacities and Specifications . . . . . . . . . . . . . . . . . 131 Check Engine Light (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . 18 Cleaning Exterior Care . . . . . . . . . . . . . . . . . .119 Cluster, Instrument . . . . . . . . . . . . . . 10 Cold Weather Operation . . . . . . . . . 49 Cooling System . . . . . . . . . . . . . . . . . 102 Covers Winter . . . . . . . . . . . . . . . . . . . . . . . . . . 27 E Electrical System Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 108 Engine Air Cleaner/Filter . . . . . . . . . . . . . . . 99 Check Light (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . 18 Compartment Overview . . . . . . . . . 86 Cooling System . . . . . . . . . . . . . . . 102 Drive Belt Routing . . . . . . . . . . . . 133 Heater . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Oil Life System . . . . . . . . . . . . . . . . . 95 Oil Pressure Gauge . . . . . . . . . . . . 17 Overheating . . . . . . . . . . . . . . . . . . 106 Starting Your Diesel . . . . . . . . . . . . 24 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 Index Engines Diesel Fuel . . . . . . . . . . . . . . . . . . . . . 45 Exhaust Brake . . . . . . . . . . . . . . . . . . . 44 Exhaust Fluid Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . 37 F Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Replacement (Fuel) . . . . . . . . . . . . . 54 Filter, Engine Air Cleaner . . . . . . . . . . . . . 99 Fluid Automatic Transmission . . . . . . . . 95 Diesel Exhaust . . . . . . . . . . . . . . . . . . 7 Fuel Biodiesel . . . . . . . . . . . . . . . . . . . . . . . 47 Cold Weather Operation . . . . . . . . 49 Diesel Engines . . . . . . . . . . . . . . . . . 45 Filling a Portable Fuel Container . . . . . . . . . . . . . . . . . . . . . 58 Filling the Tank . . . . . . . . . . . . . . . . . 56 Filter Replacement . . . . . . . . . . . . . 54 Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Operated Heater (FOH) . . . . . . . . . 33 Running out of Fuel . . . . . . . . . . . . . 53 Water in Fuel . . . . . . . . . . . . . . . . . . . 50 What to Use in the U.S. . . . . . . . . 46 Fuel for Diesel Engines . . . . . . . . . . 45 Fuses Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 108 G Gauges Engine Oil Pressure . . . . . . . . . . . . 17 Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 General Information Service and Maintenance . . . . . 120 135 M Maintenance Records . . . . . . . . . . . . . . . . . . . . . . 129 Maintenance Schedule . . . . . . . . . 122 Recommended Fluids and Lubricants . . . . . . . . . . . . . . . . . . . 126 Malfunction Indicator Lamp . . . . . . 18 O Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Fuel Operated . . . . . . . . . . . . . . . . . . 33 Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Engine Oil Life System . . . . . . . . . 95 Engine Oil Pressure Gauge . . . . . 17 Overheating, Engine . . . . . . . . . . . . 106 I P H Instrument Cluster . . . . . . . . . . . . . . . 10 Introduction . . . . . . . . . . . . . . . . . . . . . . . 2 L Lamps Malfunction Indicator (Check Engine) . . . . . . . . . . . . . . . . . . . . . . . 18 Lights Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . 18 Diesel Exhaust Fluid (DEF) . . . . . 20 Power Take-off . . . . . . . . . . . . . . . . . 21 Wait to Start . . . . . . . . . . . . . . . . . . . . 20 Parking Over Things That Burn . . . . . . . . . 34 Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . 22, 23 Power Take-Off (PTO) . . . . . . . . . . . 66 Power Take-Off Light . . . . . . . . . . . . 21 R Recommended Fluids and Lubricants . . . . . . . . . . . . . . . . . . . . . 126 Records Maintenance . . . . . . . . . . . . . . . . . . 129 Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada11354421) - 2018 - CRC - 10/10/17 136 Index Replacement Parts Maintenance . . . . . . . . . . . . . . . . . . 127 Routing, Engine Drive Belt . . . . . . 133 Running out of Fuel . . . . . . . . . . . . . . 53 V S W Service Accessories and Modifications . . . . . . . . . . . . . . . . . . 84 Maintenance Records . . . . . . . . 129 Maintenance, General Information . . . . . . . . . . . . . . . . . . 120 Specifications and Capacities . . . . . . . . . . . . . . . . . . . . . 131 Starting the Diesel Engine . . . . . . . 24 Supplement Using . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Wait to Start Light . . . . . . . . . . . . . . . 20 Water in Fuel . . . . . . . . . . . . . . . . . . . . 50 What Fuel to Use in Canada . . . . . 47 What Fuel to Use in the U.S. . . . . 46 Winter Cover . . . . . . . . . . . . . . . . . . . . 27 T Towing Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Trailer Towing . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Transmission Fluid, Automatic . . . . . . . . . . . . . . . . 95 U Using This Supplement . . . . . . . . . . . 3 Vehicle Canadian Owners . . . . . . . . . . . . . . . 2 Personalization . . . . . . . . . . . . . 22, 23 18_MUL_Duramax_Diesel_Supplement_COV_en_US_23380346C_2018MAR29.ai 1 3/22/2018 12:50:21 PM C M Y CM MY CY CMY K 23380346 C