Owners Manual Supplement
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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./Canada- 11354421) - 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./Canada- 11354421) - 2018 - CRC - 3/23/18 2 Introduction Introduction This manual describes features that your owner’s manual, will assist you may or may not be on the vehicle in the proper use and maintenance The names, logos, emblems, because of optional equipment that of your vehicle. slogans, vehicle model names, and was not purchased on the vehicle, Keep this manual in the vehicle for vehicle body designs appearing in model variants, country quick reference. this manual including, but not limited specifications, features/applications to, GM, the GM logo, CHEVROLET, that may not be available in your GMC, the CHEVROLET and GMC region, or changes subsequent to Canadian Vehicle Owners Truck Emblems, SILVERADO, the printing of this owner’s manual. A French language manual can be SIERRA, DENALI, EXPRESS, Refer to the purchase obtained from your dealer, at SAVANA, COLORADO, CANYON, documentation relating to your www.helminc.com, or from: and Duramax are trademarks and/or specific vehicle to confirm the service marks of General Motors Propriétaires Canadiens features. LLC, its subsidiaries, affiliates, On peut obtenir un exemplaire de or licensors. This manual contains information ce guide en français auprès du that pertains to the operation of your For vehicles first sold in Canada, concessionnaire ou à l'adresse diesel engine. It also contains your substitute the name General suivante: “ Diesel Maintenance Schedule. The Motors of Canada Company for ” sections in this manual correspond Helm, Incorporated GMC and Chevrolet Motor Division to the sections in your owner s Attention: Customer Service wherever it appears in this manual. ’ manual. This manual, along with 47911 Halyard Drive Plymouth, MI 48170 USA Litho in U.S.A. Part No. 23380346 C Third Printing © 2018 General Motors LLC. All Rights Reserved. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada- 11354421) - 2018 - CRC - 10/10/17 Introduction 3 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. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada- 11354421) - 2018 - CRC - 10/10/17 4 Introduction 2 NOTES Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada- 11354421) - 2018 - CRC - 10/10/17 In Brief 5 Initial Drive For areas where ambient In Brief temperatures are below −40 °C Information (−40 °F), use synthetic transmission Initial Drive Information fluid approved to Allison Transmission specification TES-295. Transmission . 5 Transmission See Recommended Fluids and Performance and Maintenance Cold Operation (8-Cylinder Pickup Lubricants 0 126 and Automatic Engine Oil Life System . 6 Models Only) Transmission Fluid 0 95. Diesel Particulate Filter . 6 When temperatures are very cold, Adaptive Shift Controls Diesel Exhaust Fluid . 7 the transmission will prevent certain (8-Cylinder Pickup Models Only) operations to protect against damage. The information below The shift quality of a new vehicle shows shift range availability based may not be ideal because the on transmission oil temperature: Adaptive Shift Control process may not have determined the best . All shift ranges available at settings for a particular shift or −25 °C (−13 °F) or above. condition. Shift quality will improve . 2 (Second) and 3 (Third) shift with continued driving. ranges only at −35 °C (−31 °F) to Low Traction Mode (All Models) −25 °C (−13 °F). Low Traction Mode aids in vehicle . 2 (Second) shift range only at acceleration on slippery road −35 °C (−31 °F) or lower. surfaces such as ice or snow. By Torque converter clutch operation selecting 2 (Second) using Range will also be prevented when air or Selection Mode while at a stop, the transmission oil temperatures are transmission will limit torque to the below certain levels. drive wheels to prevent slippage. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada- 11354421) - 2018 - CRC - 10/10/17 6 In Brief Heater Performance Mode Performance and temperature. This feature has been (8-Cylinder Pickup Models Only) designed to operate automatically, When cold weather conditions are Maintenance with limited operator involvement or detected, the transmission raises awareness. part throttle upshift points after the Engine Oil Life System Noise may be heard at low speeds 1 (First) to 2 (Second) upshift to The engine oil life system calculates when the emission controls are increase engine speed. This feature engine oil life based on vehicle use active. This is normal. shortens engine and cab warm up and displays the CHANGE ENGINE times. Cleaning the DPF (Exhaust OIL SOON message when it is time Filter) When the transmission is in this to change the engine oil and filter. mode, upshifts may be delayed. The oil life system should be reset While the DPF cleaning is This is normal and does not indicate to 100% only following an oil automatically controlled by the an operational problem. change. See “Engine Oil Life engine computer, the Driver System” in the owner’s manual. Information Center (DIC) may Four-Wheel Drive (8-Cylinder display a message. The vehicle will Pickup Models Only) Diesel Particulate Filter need to operate continuously until When operating in 4 the message is no longer displayed. n The Duramax engine is equipped Cleaning occurs most effectively (Four-Wheel-Drive Low), there is a with a Diesel Particulate Filter (DPF) above 50 km/h (30 mph). If the very deep gear reduction. The that will filter or trap particulates. vehicle is returned to idle during the resulting shifts will feel exaggerated. The DPF is under the vehicle in the cleaning process, the driver may exhaust system. notice a slightly different sound or a Depending on a number of factors slightly elevated engine idle speed. monitored by the engine computer, This is normal. No action is required the DPF will need to be cleaned of on the part of the driver during a accumulated solids. When a regular DPF cleaning. See Diesel cleaning is needed, the engine Particulate Filter 0 34. computer will initiate a cleaning action by warming the exhaust gas Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada- 11354421) - 2018 - CRC - 10/10/17 In Brief 7 Special DPF Driver Messages Fuel In addition: If the vehicle is used for numerous Use Ultra Low Sulfur Diesel . Use the correct engine oil. short trips or extended slow-speed Fuel (ULSD) . Do not add gasoline to operation, the engine computer may diesel fuel. not be able to adequately heat up Use ULSD only. The emission the exhaust system to clean the control hardware used on the . Do not modify the induction or vehicle may be damaged by using DPF effectively. The engine exhaust systems. computer has been designed to fuel with high sulfur levels. Use only 0 fuel that is dispensed from pumps See Fuel for Diesel Engines 45 continuously monitor the condition and Engine Oil 0 91. of the DPF. When the engine bearing the ULSD label. computer detects that the DPF is Do Not Use Low Sulfur Diesel Diesel Exhaust Fluid nearly full of particulates and that Fuel (LSD) the vehicle is not being operated in Diesel Exhaust Fluid (DEF) is used Do not use fuel that is dispensed a manner that would allow effective with diesel engines to reduce the from pumps bearing the LSD label. automatic DPF cleaning, the Driver amount of regulated emissions Information Center (DIC) will display Do Not Use Non-Highway Fuel produced. The DEF system must be a message. maintained for the vehicle to run Fuel labeled as off road or properly. If the vehicle continues to be driven non-highway is typically very high in in a manner that prevents effective sulfur content and will damage the DEF is not a fuel additive. For DPF cleaning, the DPF will become emission control system. refilling instructions, see Diesel plugged with particulates. If this Non-highway fuel is not intended for Exhaust Fluid 0 37. DEF should not occurs, the engine computer will use in on-highway vehicles and be mixed with or added to diesel turn on the Malfunction Indicator does not have the fuel properties fuel. DEF freezes when exposed to Lamp (Check Engine Light) in the needed by the DPF-equipped temperatures below −11 °C (12 ° F). instrument cluster, and the DIC will Duramax diesel. display the message ENGINE POWER IS REDUCED. See Diesel Particulate Filter 0 34. Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada- 11354421) - 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.