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irritation to the upper respiratory tract. For more safety and storage information, see the label of the Diesel Exhaust Fluid container.
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 correctly. In cold conditions it is normal for DEF to freeze. For DEF tank capacity see Capacities and Specifications 0 126.
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Driving and Operating
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 0 121.
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.
The fill tube location for chassis-cab and cutaway vans finished by an upfitter will vary. Check the upfitter manual.
It is recommended to fill the DEF tank. For DEF tank capacity see Capacities and Specifications 0 126. 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 - 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.
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.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Exhaust Fluid Low A full DEF tank will last for several thousand kilometers (miles), depending on vehicle usage. 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. 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. 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 1600 km (1000 mi). This message appears again at approximately 500 km (300 mi) of remaining range before the exhaust fluid tank becomes empty. See the following list for approximate remaining volume when 1600 km (1000 mi) warning appears: . Colorado/Canyon - 3.8 L
(1.0 gal)
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. Silverado/Sierra/Sierra Denali -
5.7 L (1.5 gal)
. Express/Savana - 5.7 L (1.5 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: . EXHAUST FLUID EMPTY
REFILL NOW - 644 KM (400 MI) UNTIL 105 KM/H (65 MPH) MAX SPEED.
. For emergency vans with RPO YF2 or emergency pickups with RPO ANM, EXHAUST FLUID EMPTY REFILL NOW - 998 KM (620 MI) UNTIL 105 KM/H (65 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.
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Driving and Operating
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 vans with RPO YF2 or emergency pickups with RPO ANM, EXHAUST FLUID EMPTY REFILL NOW - SPEED LIMITED TO 105 KM/H (65 MPH) – 933 KM (580 MI) UNTIL 89 KM/H (55 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 7 KM/H (4 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 7 KM/H (4 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 7 km/h (4 mph). After the transition to 7 km/h (4 mph) is complete, the DIC message EXHAUST FLUID EMPTY REFILL NOW - SPEED LIMITED TO 7 KM/H
(4 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 gals) of DEF need to be added to release the vehicle from the speed limitation. See Capacities and Specifications 0 126. See Diesel Exhaust Fluid Messages 0 23, Diesel Exhaust Fluid (DEF) Warning Light 0 20, and Recommended Fluids and Lubricants 0 121.
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.
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. For emergency vans with RPO YF2 or emergency pickups with RPO ANM, EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW – 998 KM (620 MI) UNTIL 105 KM/ H (65 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 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 vans with RPO YF2 or emergency pickups with RPO ANM, EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW - SPEED LIMITED TO 105 KM/H (65 MPH) – 933 KM (580 MI) UNTIL 89 KM/H (55 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. 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).
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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 7 KM/H (4 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, a DIC message EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW - TRANSITIONING TO 7 KM/H (4 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 7 km/h (4 mph). After the transition to 7 km/h (4 mph) is complete, a DIC message EXHAUST FLUID QUALITY POOR - SEE OWNERS MANUAL NOW - SPEED LIMITED TO 7 KM/H (4 MPH) displays. A flashing warning light and a chime also come on.
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Service Exhaust Fluid System 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 vans with RPO YF2 or emergency pickups with RPO ANM, SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW – 998 KM (620 MI) UNTIL 105 KM/ H (65 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 vans with RPO YF2 or emergency pickups with RPO ANM, SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW - SPEED LIMITED TO 105 KM/H (65 MPH) – 933 KM (580 MI) UNTIL 89 KM/H (55 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 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 7 KM/H (4 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 7 KM/H (4 MPH) MAX SPEED displays. A flashing warning light and a chime
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(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.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
also come on. Vehicle speed will be reduced to a maximum speed limit of 7 km/h (4 mph). After the transition to 7 km/h (4 mph) is complete, the DIC message SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL NOW - SPEED LIMITED TO 7 KM/H (4 MPH) displays. A flashing warning light and a chime also come on.
Service Emission System These restrictions are not applicable to emergency vans with RPO YF2
or 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.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
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Brakes
Exhaust Brake Diesel pickups have an exhaust brake to enhance the vehicle brake system and reduce brake lining wear.
4-Cylinder Pickups
To activate the system, press the switch below the climate controls in the center stack. For 8-cylinder pickups use the exhaust brake switch. For 4-cylinder pickups the exhaust brake is activated when Tow/Haul Mode is activated. See “Tow/Haul Mode” in the owner manual. The switch must be pressed at each vehicle start for the system to be active. A light in the switch (8-cylinder pickups) will come on when the exhaust brake is activated, or in the instrument cluster (4-cylinder pickups) when the exhaust brake and Tow/Haul are activated.
8-Cylinder Pickups
For 8-cylinder pickups, the Driver Information Center (DIC) displays the message EXHAUST BRAKE ON for approximately 10 seconds, then clears. To turn the brake off, press the exhaust brake switch a second time. For 8-cylinder pickups, the DIC displays the message EXHAUST BRAKE OFF for approximately 10 seconds, then clears. 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.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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. For 8-cylinder pickups, the exhaust brake will be more active when in Tow/Haul Mode.
Fuel
Fuel for Diesel Engines This vehicle is approved to use diesel fuel with no more than 15
ppm sulfur content and biodiesel up to 20% by volume. Both diesel and biodiesel blends must meet all the requirements as defined in the most current versions of the local fuel standards. Please see the recommended fuels for individual countries, as described in the following sections.Caution
Engine damage may occur and the damage would not be covered by the warranty if:
. Gasoline is added to the
fuel tank. Gasoline should never be added to the fuel tank.
(Continued)
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Caution (Continued)
. Diesel fuel has been mixed
with engine oil, vegetable oil, or automatic transmission fluid.
. Marine diesel fuel; fuel oils; diesel fuels that are entirely or partially plant based, such as rape seed oil or bio-diesel; Aquazole®; or similar diesel-water emulsions are used.
. Diesel fuel or fuel additives that are not recommended are used.
. Aftermarket diesel fuel
additives, particularly those that contain alcohol or water emulsifiers, are used. Consult your dealer before using a fuel additive.
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).
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What Fuel to Use in The U.S. Use only diesel fuel with ultra low sulfur content (15 ppm, maximum). Look for dispensers with this label.
Use diesel fuel that meets ASTM specification D 975, 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 fuel can be used in very cold temperatures (below -18 °C or 0 °F); however, it will reduce power 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. The fuels industry usually will automatically modify the fuel for the
appropriate seasonal blend. If in doubt, please confirm with your local fuel supplier.
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. Biodiesel Biodiesel is a renewable fuel produced from vegetable oils or animal fats that have been chemically modified for normal performance.
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,
(Continued)
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Caution (Continued)
Caution (Continued)
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after-treatment system damage would not be covered by the vehicle warranty.
Pumps dispensing more than 5% and up to 20% biodiesel are required to be labeled with the concentration of biodiesel. When refueling with a biodiesel blend above B5, one of the following labels should appear on the dispenser:
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.
Biodiesel blends 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).
Caution
Do not use blends containing more than 20% biodiesel. Any engine, fuel system, or exhaust
(Continued)
. Blends containing more than 5%
and up to 20% biodiesel must meet ASTM specification D7467
(Biodiesel blend, B6 - B20). Biodiesel quality can vary widely. To reduce the risk of poor qualityChevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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fuel, purchase biodiesel blends from a BQ-9000 certified marketer. See www.bq-9000.org for a list of certified marketers.
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.
. Vehicles operated for extended
periods of time on Ultra Low Sulfur Diesel fuel and then switched to biodiesel blends may experience premature fuel filter clogging and require more frequent fuel filter service. With long-term use of Ultra Low Sulfur Diesel fuel, gum and varnish may be deposited within the tank and fuel system. These deposits, while not problematic with the use of Ultra Low Sulfur Diesel fuel, may become loosened with a sudden switch to biodiesel blends and cause fuel filter plugging. If the vehicle experiences a fuel filter restriction, the on-board monitoring system will alert the driver that the fuel filter requires
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
service. The fuel filter, however, will not prevent all damage caused by poor quality biodiesel.
Refueling 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. See Filling the Tank 0 62.
{ Warning
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.
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, preferably until the fuel gauge reads near E (Empty). Refuel with Ultra Low Sulfur Diesel fuel.
What Fuel to Use in Canada and Mexico Use only diesel fuel with ultra low sulfur content (15 ppm maximum).
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What Fuel to Use in Canada 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
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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.
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 for normal engine performance.
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 (Continued)
Caution (Continued)
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.
Biodiesel Blends Biodiesel blends that meet the CAN/ CGSB-3.522 specifications up to 20% (B20) can be used. Avoid the use of biodiesel blends above 20%, as they may damage the engine and fuel system. For detailed information on the use of biodiesel, see What Fuel to Use in The U.S. 0 48. Refueling 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. See Filling the Tank 0 62.
{ Warning
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.
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, preferably until the fuel
(Continued)
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Caution (Continued)
gauge reads near E (Empty). Refuel with Ultra Low Sulfur Diesel fuel.
What Fuel to Use in Mexico Use diesel fuel specification NOM-086 Pemex UBA, which meets the Ultra Low Sulfur Diesel fuel requirement of 15 ppm sulfur maximum. This fuel is not available in all regions of Mexico.
Caution
Use of diesel fuel other than Ultra Low Sulfur Diesel (15 ppm sulfur maximum) will damage the exhaust after-treatment system. This damage would not be covered by the vehicle warranty.
Cold Weather Operation 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 58. At temperatures below 0 °C (32 °F), it is recommended to avoid using biodiesel blends above (5% blend) which may cause fuel filter plugging, system gelling, and freezing that may affect vehicle starting. 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.
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 message displays, the water must be drained immediately.
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{ Warning
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.
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)
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Caution (Continued)
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 If the WATER IN FUEL SERVICE REQUIRED message comes on:
Problem
Message displays and stays on.
Problem Immediately after refueling, 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, then drain the fuel. If still no water drains, see your dealer.
Recommended
Action
A large amount of water is in the fuel tank. Drain the fuel filter immediately. If the message stays on, or comes back on again without refueling, fuel tank purging is required. See your dealer. If the message displays and the vehicle stalls or has rough riding, do not drive until the water contaminated fuel is drained.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Driving and Operating
55
Caution
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 Fuel Filter To drain water: 1. Turn the engine off and apply
the parking brake.
8-Cylinder Pickup
Van
2. Place a container under the
filter drain valve. The filter drain valve is on the bottom of the fuel filter. For 8-cylinder pickup models, the filter drain valve is on the passenger side of the engine compartment. For 4-cylinder pickup and van models, the filter drain valve is under the vehicle on the driver side, inside the frame rail.
3. For 8-cylinder pickup models,
open the drain valve by turning it two to three turns. Pump the primer until fuel empties from
4-Cylinder Pickup
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Driving and Operating
the valve and all of the water has been drained. Close the valve hand tight. For 4-cylinder pickup and van models, 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.
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.
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.
To Prime 8-Cylinder Pickup Models The priming pump is part of the engine fuel filter and will bring fuel to the engine to eliminate air in the fuel lines. To prime the engine: 1. Correct any condition that caused the loss of prime. 2. Check that the fuel filter is
installed and properly tightened, and cool enough to touch.
3. Check that the fuel lines are
properly connected.
4. Remove any dirt from the fuel
filter head and vent valve.
5. Locate the fuel filter vent valve on top of the fuel filter housing. Turn the valve screw counterclockwise several full turns to open.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
engine to idle for a few minutes after it starts. Check the filter for leaks.
To Prime 4-Cylinder Pickup and Van Models 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 to ON/RUN for
30 seconds. Do not start the engine. The fuel pump will start priming.
4.
3. Turn the ignition off, then back to start, and crank the engine for 15 seconds. 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 key off for 60 seconds.5. Repeat the above steps until
the engine starts.
Driving and Operating
57
6.
7.
If the engine starts, but does not run smoothly, increase the engine speed slightly. If the engine starts and runs but stalls again, turn the ignition off for 60 seconds.
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 any fuel from the air bleed valve, and wipe up any spilled fuel with a cloth.
6. Locate the fuel filter priming pump on top of the fuel filter housing. Push down and let it return up several times.
7. Continue priming the pump until a small amount of fuel comes from the vent valve. This indicates the filter is full of fuel and the system should be primed.
8. Close the vent valve. Clean
any fuel off the fuel filter. Try to start the engine. If the engine stalls, operate the priming pump several times in between starting attempts. Allow the
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Driving and Operating
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.
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 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 in the engine compartment on the passenger side of the vehicle. 1. Drain any water from the filter.
See “Removing Water from Fuel Filter” in Water in Fuel 0 53. Keep the engine off until the procedure is completed. 2. Apply the parking brake. 3. Access the fuel filter through
the passenger side wheel house opening. Remove only the necessary fasteners to
Driving and Operating
59
13. Reset the fuel filter monitor.
See Driver Information Center (DIC) 0 21.
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.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
allow the rear of the wheel liner to be lowered enough for fuel filter access.
4. Unplug the water sensor wire connected to the fuel filter and unscrew the filter element.
5. Clean the fuel filter area on the
engine before removing the fuel filter.
Caution
Failure to cover the fuel filter with a clean cloth to keep out debris when replacing may cause dirt to (Continued)
Caution (Continued)
get into the engine. This could cause engine damage. Keep the fuel filter covered with a clean cloth when replacing.
6. Remove the filter element.
If there is any dirt on the filter sealing surface, clean it off. Remove and reuse the water sensor float switch on the bottom of the fuel filter. Install the new filter element. 7. 8. Reinstall and tighten the filter container and reconnect the water sensor wire to the filter.
9. Reposition the wheel liner. 10.
Install and tighten the fasteners.
11. Use the fuel filter priming
procedure earlier in this section to prime the fuel filter.
12. Start the engine and let it idle
for five minutes. Check the fuel filter and air bleed valve for leaks.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Driving and Operating
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 Fuel Filter” in Water in Fuel 0 53. 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.
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.
Van Models If the fuel operated heater (FOH) is not working, the FOH line requires priming. See your dealer for service. See Fuel Operated Heater (FOH) 0 37.
{ 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 and fuel pump screen are on the driver side frame rail in front of the fuel tank. The fuel pump screen should be inspected and cleaned if necessary at each fuel filter inspection or replacement. The fuel level must be less than three-quarters full.
4. Remove both the filter
elements. If there is any dirt on the filter sealing surface, clean it off. Install the new filter elements and tighten both the caps. 6. Use the fuel filter priming
5.
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.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
1. Drain any water from the filter.
See “Removing Water From Fuel Filter” in Water in Fuel 0 53.
2. Keep the engine off until the
procedure is completed.
Fuel Filter 1. Apply the parking brake.
4. Install the new filter element. 5. Reinstall and tighten the filter cap and reconnect the water sensor wire to the filter.
6. Follow the vehicle fuel system
priming procedure earlier in this section to re-prime the system.
7. Start the engine and let it idle
for five minutes.
Fuel Pump Screen 1. Apply the parking brake.
2. Unplug the water sensor wire
connected to the fuel filter (lowest wire) and unscrew the filter cap.
3. Remove the filter element.
If there is any dirt on the filter sealing surface, clean it off.
2. Unscrew the fuel pump
screen bowl.
Driving and Operating
61
3. Remove the filter element.
5.
If there is any dirt on the filter sealing surface, clean it off. 4. Clean the fuel pump screen and fuel pump screen bowl o-ring. Inspect the screen and o-ring for damage. Replace as necessary. Install the fuel pump screen and o-ring. Install the fuel pump screen bowl.
6.
7.
8. Follow the vehicle fuel system
priming procedure earlier in this section to re-prime the system.
9. Start the vehicle and let it idle
for five minutes.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Driving and Operating
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.
. Do not leave the fuel pump
unattended.
. Do not use a cell phone
while refueling.
. Do not re-enter the vehicle
while pumping fuel.
. Keep children away from
the fuel pump and never let children pump fuel.
(Continued)
Warning (Continued)
. 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
exhaust fluid cap is also behind the fuel door. Do not remove both caps at the same time. For chassis-cab models, refuel the front tank first, or in instances when only a partial fuel fill is desired. An automatic transfer mechanism will maintain approximately equal fuel levels in both tanks, so no switching is required. To remove the fuel cap, turn it slowly to the left (counterclockwise).
{ Warning
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. . Potential fuel fires.
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
Be careful not to spill fuel. Wait a few seconds after you have finished pumping before removing the nozzle. Clean fuel from painted
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
surfaces as soon as possible. See “Exterior Care” in the Owner Manual. 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.
Caution
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.
Driving and Operating
63
Caution
Warning (Continued)
. Place the container on the
ground.
. 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.
If your vehicle has been accidentally filled with gasoline, do not run the engine or severe engine damage can occur. Contact your dealer to have the fuel system flushed.
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.
(Continued)
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Driving and Operating
Towing
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 0 109. Use the following chart to determine how much the vehicle can weigh, based upon your vehicle model and options.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
2500/3500 Series Pickup Models – SAE J2807 Compliant
Vehicle
Axle Ratio
Max. Trailer Wt.5
GCWR *
Driving and Operating
65
C-2500 Pickup Models – 2WD Pickup Model Double Cab Standard Box 1
Pickup Model Crew Cab Standard Box 1
Pickup Model Regular Cab Long Box 2
Pickup Model Double Cab Long Box 2
Pickup Model Crew Cab Long Box 2K-2500 Pickup Models – 4WD Pickup Model Double Cab Standard Box 1
Pickup Model Crew Cab Standard Box 1
Pickup Model Regular Cab Long Box 2
Pickup Model Double Cab Long Box 23.73
3.73
3.73
3.73
3.73
3.73
3.73
3.73
3.73
7 666 kg (16,900 lb)
11 385 kg (25,100 lb)
7 167 kg (15,800 lb)
11 385 kg (25,100 lb)
8 165 kg (18,000 lb)
11 385 kg (25,100 lb)
7 303 kg (16,100 lb)
11 385 kg (25,100 lb)
6 895 kg (15,200 lb)
11 385 kg (25,100 lb)
6 759 kg (14,900 lb)
11 385 kg (25,100 lb)
6 305 kg (13,900 lb)
11 385 kg (25,100 lb)
7 439 kg (16,400 lb)
11 385 kg (25,100 lb)
6 441 kg (14,200 lb)
11 385 kg (25,100 lb)
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Driving and Operating
2500/3500 Series Pickup Models – SAE J2807 Compliant
Vehicle
Pickup Model Crew Cab Long Box 2
Axle Ratio
3.73
Max. Trailer Wt.5
5 851 kg (12,900 lb)GCWR *
11 385 kg (25,100 lb)
C-3500 Pickup Model Double Cab Long Box – 2WD 3.73
3.73Single Rear Wheels 2
Dual Rear Wheels 3C-3500 Pickup Model Crew Cab Standard Box – 2WD
Single Rear Wheels 1
3.73
C-3500 Pickup Model Crew Cab Long Box – 2WD 3.73
3.73Single Rear Wheels 2
Dual Rear Wheels 3K-3500 Pickup Model Regular Cab Long Box – 4WD
Single Rear Wheels 2
Dual Rear Wheels 33.73
3.73
K-3500 Pickup Model Double Cab Long Box – 4WD 3.73
3.73Single Rear Wheels 2
Dual Rear Wheels 37 893 kg (17,400 lb) 10 478 kg (23,100 lb)
11 385 kg (25,100 lb) 14 107 kg (31,100 lb)
7 938 kg (17,500 lb)
11 385 kg (25,100 lb)
7 847 kg (17,300 lb) 10 387 kg (22,900 lb)
11 385 kg (25,100 lb) 14 107 kg (31,100 lb)
7 938 kg (17,500 lb) 10 523 kg (23,200 lb)
11 385 kg (25,100 lb) 14 107 kg (31,100 lb)
7 756 kg (17,100 lb) 10 342 kg (22,800 lb)
11 385 kg (25,100 lb) 14 107 kg (31,100 lb)
K-3500 Pickup Model Crew Cab Standard Box – 4WD
Single Rear Wheels 1
3.73
7 802 kg (17,200 lb)
11 385 kg (25,100 lb)
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
Driving and Operating
67
2500/3500 Series Pickup Models – SAE J2807 Compliant
Vehicle
Axle Ratio
Max. Trailer Wt.5
GCWR *
K-3500 Pickup Model Crew Cab Long Box – 4WD 3.73
3.73Single Rear Wheels 4
Dual Rear Wheels37 666 kg (16,900 lb) 10 251 kg (22,600 lb)
11 385 kg (25,100 lb) 14 107 kg (31,100 lb)
*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. 1Trailer rating limited to 5 897 kg (13,000 lb) with conventional hitch. 2Trailer rating limited to 6 577 kg (14,500 lb) with conventional hitch. 3Trailer rating limited to 9 072 kg (20,000 lb) with conventional hitch. 4Trailer rating limited to 6 804 kg (15,000 lb) with conventional hitch. 5For 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.
C/K-3600 Series Chassis Cab
Vehicle
Axle Ratio
Max. Trailer Wt.2
GCWR *
C/K-3600 Chassis Cab – 2WD/4WD
All
3.73
14 107 kg (31,100 lb)
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
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Driving and Operating
C/K-3600 Series Chassis Cab
Vehicle
Axle Ratio
Max. Trailer Wt.2
GCWR *
*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. 1Maximum Trailer Weight cannot be provided because total vehicle weight is unknown. 2For 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 *
Colorado/Canyon Pickup Models – 2WD
All
Colorado/Canyon Pickup Models – 4WD
Short Wheel Base Ext. Cab Short Wheel Base Crew Cab Long Wheel Base Crew Cab
3.42
3.42
3.42
3.423 492 kg (7,700 lb)
5 761 kg (12,700 lb)
3 492 kg (7,700 lb) 3 447 kg (7,600 lb) 3 447 kg (7,600 lb)
5 761 kg (12,700 lb) 5 761 kg (12,700 lb) 5 761 kg (12,700 lb)
*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.
Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S/Canada- 9234763) - 2016 - crc - 10/5/15
2500/3500 Series Van Models
Vehicle
Axle Ratio
G2500 Cargo Van Short Wheelbase G2500 Cargo Van Long Wheelbase G3500 Cargo Van Short Wheelbase G3500 Cargo Van Long Wheelbase G3500 Passenger Van Short Wheelbase G3500 Passenger Van Long Wheelbase G3500 Cutaway Van 139” and 155” Wheelbase G3500 Cutaway Van 155” and 159” Wheelbase
3.54
3.54
3.54
3.54
3.54
3.54
3.54
3.73
Driving and Operating
69
Max. Trailer Wt.1
4 536 kg (10,000 lb)GCWR *
7 711 kg (17,000 lb)
4 536 kg (10,000 lb)
7 711 kg (17,000 lb)
4 536 kg (10,000 lb)
7 711 kg (17,000 lb)
4 536 kg (10,000 lb)
8 391 kg (18,500 lb)
4 491 kg (9,900 lb)
7 711 kg (17,000 lb)
4 309 kg (9,500 lb)
7 711 kg (17,000 lb)
7 711 kg (17,000 lb)
8 391 kg (18,500 lb)
*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. 1For cutaway vehicles, choose an appropriate hitch and load the truck and trailer within the limits of GCWR, GVWR, and RGAWR. 2Maximum Trailer Weight cannot be provided because total vehicle weight is unknown.
