1. Valley RV Supercenter
  2. RV Research
  3. Towing Capacity
  4. 2018
  5. GMC
  6. Sierra

Find 2018 GMC Sierra towing capacity information by trim and configuration.

Trims

TrimEngineDrivetrainAxle RatioTowing CapacityShop
1500 Double Cab4.3L V64WD
7,100 lbsShop >
1500 Double CabEcoTec3 5.3L V84WD
6,200 lbsShop >
1500 Double CabEcoTec3 6.2L V84WD
9,100 lbsShop >
1500 Regular Cab Long Bed4.3L V64WD
7,400 lbsShop >
1500 Regular Cab Standard Bed4.3L V64WD
7,600 lbsShop >
1500 Regular Cab Long BedEcoTec3 5.3L V84WD
6,500 lbsShop >
1500 Regular Cab Standard BedEcoTec3 5.3L V84WD
6,600 lbsShop >
2500 Crew Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
14,500 lbsShop >
2500 Crew Cab Standard BedDuramax 6.6L V8 Turbodiesel4WD
13,000 lbsShop >
2500 Crew Cab Long BedVortec 6.0L Flex Fuel V8 360hp 380ft. lbs.4X2
14,300 lbsShop >
2500 Crew Cab Standard BedVortec 6.0L Flex Fuel V8 360hp 380ft. lbs.4X2
13,000 lbsShop >
2500 Double Cab Long Bed6.0L V84WD
14,100 lbsShop >
2500 Double Cab Standard Bed6.0L V84WD
13,000 lbsShop >
2500 Double Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
14,500 lbsShop >
2500 Double Cab Standard BedDuramax 6.6L V8 Turbodiesel4WD
13,000 lbsShop >
2500 Regular Cab Long Bed6.0L V84WD
14,500 lbsShop >
2500 Regular Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
14,500 lbsShop >
3500 Crew Cab Long Bed6.0L V84WD
13,700 lbsShop >
3500 Crew Cab Standard Bed6.0L V84WD
13,000 lbsShop >
3500 Crew Cab Long Bed6.6L V8 Turbo Diesel4WD
15,000 lbsShop >
3500 Crew Cab Standard Bed6.6L V8 Turbo Diesel4WD
13,000 lbsShop >
3500 Crew Cab Dually Long Bed6.0L V84WD
13,400 lbsShop >
3500 Crew Cab Dually Long Bed6.6L V8 Turbo Diesel4WD
20,000 lbsShop >
3500 Double Cab Long Bed6.0L V84X2
14,200 lbsShop >
3500 Double Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
20,000 lbsShop >
3500 Double Cab Dually Long Bed6.0L V84X2
13,800 lbsShop >
3500 Double Cab Dually Long BedDuramax 6.6L V8 Turbodiesel4WD
20,000 lbsShop >
3500 Regular Cab Long Bed6.0L V84X2
14,500 lbsShop >
3500 Regular Cab Long BedDuramax 6.6L V8 Turbodiesel4X4
14,500 lbsShop >
3500 Regular Cab Dually Long Bed6.0L V84X2
14,300 lbsShop >
3500 Regular Cab Dually Long BedDuramax 6.6L V8 Turbodiesel4X4
20,000 lbsShop >
Crew Cab Short Bed4.3L V64WD
7,000 lbsShop >
Crew Cab Short BedV8, 5.3L4WD
6,100 lbsShop >
Crew Cab Standard BedV8, 5.3L4WD
6,100 lbsShop >
Crew Cab Short BedV8, 6.2L4WD
9,100 lbsShop >
Crew Cab Standard BedV8, 6.2L4WD
9,000 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 Crew Cab Dually Long Bed, 6.6L V8 Turbo Diesel, 4WD, axle 3.73 (20,000 lbs) 2. 3500 Double Cab Long Bed, Duramax 6.6L V8 Turbodiesel, 4WD, axle 3.73 (20,000 lbs) 3. 3500 Double Cab Dually Long Bed, Duramax 6.6L V8 Turbodiesel, 4WD, axle 3.73 (20,000 lbs) 4. 3500 Regular Cab Dually Long Bed, Duramax 6.6L V8 Turbodiesel, 4X4, axle 3.73 (20,000 lbs) 5. 3500 Crew Cab Long Bed, 6.6L V8 Turbo Diesel, 4WD, axle 3.73 (15,000 lbs)

By highest conventional towing rating in this dataset: 1. 3.73 (up to 20,000 lbs) 2. 4.10 (up to 14,500 lbs) 3. 3.42 (up to 12,500 lbs) Always confirm your exact configuration from the manufacturer documentation and door-sticker ratings.

Top fifth-wheel capacities in this dataset: 1. 3500 Regular Cab Dually Long Bed, Duramax 6.6L V8 Turbodiesel, 4X4, axle 3.73 (23,300 lbs) 2. 3500 Double Cab Dually Long Bed, Duramax 6.6L V8 Turbodiesel, 4X2, axle 3.73 (23,200 lbs) 3. 3500 Crew Cab Dually Long Bed, 6.6L V8 Turbo Diesel, 4X2, axle 3.73 (23,100 lbs) Fifth-wheel limits can differ from conventional towing ratings.

Gooseneck towing capacity is not published for these configurations yet. Gooseneck limits can differ from both fifth-wheel and conventional towing values.