1. Valley RV Supercenter
  2. RV Research
  3. Towing Capacity
  4. 2021
  5. GMC
  6. Sierra

Find 2021 GMC Sierra towing capacity information by trim and configuration.

Trims

TrimEngineDrivetrainAxle RatioTowing CapacityShop
1500 Crew Cab Short Bed2.7L I4 Turbo DOHC4WD
8,900 lbsShop >
1500 Crew Cab Standard Bed2.7L I4 Turbo DOHC4WD
8,900 lbsShop >
1500 Crew Cab Short Bed3.0L I64WD
8,500 lbsShop >
1500 Crew Cab Standard Bed3.0L I64WD
8,800 lbsShop >
1500 Crew Cab Short Bed4.3L V64WD
7,400 lbsShop >
1500 Crew Cab Standard Bed4.3L V64WD
7,400 lbsShop >
1500 Crew Cab Short Bed6.2L V84WD
8,600 lbsShop >
1500 Crew Cab Standard Bed6.2L V84WD
9,000 lbsShop >
1500 Crew Cab Short BedEcoTec3 5.3L V84WD
9,200 lbsShop >
1500 Crew Cab Standard BedEcoTec3 5.3L V84WD
9,100 lbsShop >
1500 Double Cab Standard Bed2.7L I4 Turbo DOHC4WD
9,000 lbsShop >
1500 Double Cab Standard Bed3.0L I6RWD
9,300 lbsShop >
1500 Double Cab Standard Bed4.3L V6RWD
7,600 lbsShop >
1500 Double Cab Standard BedEcoTec3 5.3L V8RWD
9,500 lbsShop >
1500 Regular Cab Long Bed4.3L V64WD
7,600 lbsShop >
1500 Regular Cab Long BedEcoTec3 5.3L V84WD
9,700 lbsShop >
2500 HD Crew Cab Long Bed6.6L V8 Gas / E854WD
14,500 lbsShop >
2500 HD Crew Cab Standard Bed6.6L V8 Gas / E854WD
14,500 lbsShop >
2500 HD Crew Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
18,500 lbsShop >
2500 HD Crew Cab Standard BedDuramax 6.6L V8 Turbodiesel4WD
18,500 lbsShop >
2500 HD Double Cab Long Bed6.6L Duramax Turbo-Diesel V8 engine4WD
14,500 lbsShop >
2500 HD Double Cab Standard Bed6.6L Duramax Turbo-Diesel V8 engine4WD
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2500 HD Double Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
14,500 lbsShop >
2500 HD Double Cab Standard BedDuramax 6.6L V8 Turbodiesel4WD
14,500 lbsShop >
2500 HD Regular Cab Long Bed6.6L Duramax Turbo-Diesel V8 engine4WD
14,500 lbsShop >
2500 HD Regular Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
14,500 lbsShop >
3500 HD Crew Cab Long Bed6.6L V84WD
16,240 lbsShop >
3500 HD Crew Cab Standard Bed6.6L V84WD
14,500 lbsShop >
3500 HD Crew Cab Long BedDuramax 6.6L V8 Turbo Diesel4WD
20,000 lbsShop >
3500 HD Crew Cab Standard BedDuramax 6.6L V8 Turbo Diesel4WD
20,000 lbsShop >
3500 HD Double Cab Long Bed6.6L Duramax Turbo-Diesel V8 engine4WD
14,500 lbsShop >
3500 HD Double Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
14,500 lbsShop >
3500 HD Double Rear Wheel Double Cab Long Bed6.6L Duramax Turbo-Diesel V8 engine4WD
16,390 lbsShop >
3500 HD Double Rear Wheel Double Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
20,000 lbsShop >
3500 HD Double Rear Wheel Regular Cab Long Bed6.6L Duramax Turbo-Diesel V8 engine4WD
16,800 lbsShop >
3500 HD Double Rear Wheel Regular Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
20,000 lbsShop >
3500 HD Regular Cab Long Bed6.6L Duramax Turbo-Diesel V8 engine4WD
14,500 lbsShop >
3500 HD Regular Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
14,500 lbsShop >
Heavy Duty 2500 Double Cab Standard Bed6.6L Duramax Turbo-Diesel V8 engine4X2
14,500 lbsShop >
Heavy Duty 2500 Double Cab Standard BedDuramax 6.6L V8 Turbodiesel4WD
14,500 lbsShop >

Related Glossary Terms

GVWR

Gross Vehicle Weight Rating, or GVWR, is the maximum allowable weight of an RV including cargo, fluids, and passengers. Staying within GVWR is essential for safe handling, braking, and compliance.

GCWR

Gross Combined Weight Rating, or GCWR, is the maximum total allowable weight of a tow vehicle plus the RV or trailer it is pulling. It is one of the most important towing specifications to understand before buying or towing an RV.

Payload Capacity

Payload capacity is the maximum combined weight of cargo, passengers, fluids, and gear that a vehicle or RV can safely carry. It is an important figure for both tow vehicles and RVs.

Dry Weight

Dry weight is the weight of an RV without cargo, fluids, propane, or passengers. It is often used as a starting point when estimating towing requirements.

Tongue Weight

Tongue weight is the downward force a trailer places on the hitch of the tow vehicle. Proper tongue weight is critical for towing stability, steering control, and safety.

Hitch Weight

Hitch weight is the amount of weight a trailer places on the hitch of the tow vehicle. It is closely related to tongue weight and helps determine whether a towing setup is safe.

Curb Weight

Curb weight is the weight of a vehicle with standard equipment and fuel but without passengers or cargo. It is often used when evaluating tow vehicle and payload calculations.

Weight Distribution Hitch

A weight distribution hitch helps spread trailer weight more evenly across the tow vehicle and trailer axles. It improves towing stability, braking, and overall handling.

Frequently asked questions

Top configurations in this dataset: 1. 3500 HD Crew Cab Long Bed, Duramax 6.6L V8 Turbo Diesel, 4WD, axle 3.42 (20,000 lbs) 2. 3500 HD Crew Cab Standard Bed, Duramax 6.6L V8 Turbo Diesel, 4WD, axle 3.42 (20,000 lbs) 3. 3500 HD Double Rear Wheel Double Cab Long Bed, Duramax 6.6L V8 Turbodiesel, 4WD, axle 3.42 (20,000 lbs) 4. 3500 HD Double Rear Wheel Regular Cab Long Bed, Duramax 6.6L V8 Turbodiesel, 4WD, axle 3.42 (20,000 lbs) 5. 2500 HD Crew Cab Long Bed, Duramax 6.6L V8 Turbodiesel, 4WD, axle 3.42 (18,500 lbs)

By highest conventional towing rating in this dataset: 1. 3.42 (up to 20,000 lbs) 2. 3.73 (up to 16,800 lbs) 3. 3.23 (up to 9,500 lbs) Always confirm your exact configuration from the manufacturer documentation and door-sticker ratings.

Top fifth-wheel capacities in this dataset: 1. 3500 HD Double Rear Wheel Regular Cab Long Bed, Duramax 6.6L V8 Turbodiesel, RWD, axle 3.42 (32,000 lbs) 2. 3500 HD Double Rear Wheel Regular Cab Long Bed, Duramax 6.6L V8 Turbodiesel, 4WD, axle 3.42 (31,760 lbs) 3. 3500 HD Double Rear Wheel Double Cab Long Bed, Duramax 6.6L V8 Turbodiesel, RWD, axle 3.42 (31,500 lbs) Fifth-wheel limits can differ from conventional towing ratings.

Top gooseneck capacities in this dataset: 1. 3500 HD Double Rear Wheel Regular Cab Long Bed, Duramax 6.6L V8 Turbodiesel, RWD, axle 3.42 (36,000 lbs) 2. 3500 HD Double Rear Wheel Regular Cab Long Bed, Duramax 6.6L V8 Turbodiesel, 4WD, axle 3.42 (31,760 lbs) 3. 3500 HD Double Rear Wheel Double Cab Long Bed, Duramax 6.6L V8 Turbodiesel, RWD, axle 3.42 (31,500 lbs) Gooseneck limits can differ from both fifth-wheel and conventional towing values.