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  4. 2003
  5. GMC
  6. Sierra

Find 2003 GMC Sierra towing capacity information by trim and configuration.

Trims

TrimEngineDrivetrainAxle RatioTowing CapacityShop
Denali6.0L V8RWD
10,000 lbsShop >
Heavy Duty 2500 Long BedVortec 8.1L V8 330hp 450ft. lbs.4WD
12,000 lbsShop >
Heavy Duty 2500 Crew CabVortec 8.1L V8 330hp 450ft. lbs.4WD
12,000 lbsShop >
Heavy Duty 2500 Crew Cab Long BedVortec 8.1L V8 330hp 450ft. lbs.4WD
13,700 lbsShop >
Heavy Duty 2500 EC Long BedVortec 8.1L V8 330hp 450ft. lbs.4WD
12,000 lbsShop >
Heavy Duty 2500 Extended CabVortec 8.1L V8 330hp 450ft. lbs.4WD
12,000 lbsShop >
Heavy Duty 3500 Long BedDuramax 6.6L V8 Turbodiesel4WD
12,000 lbsShop >
Heavy Duty 3500 Crew Cab Long BedDuramax 6.6L V8 Turbodiesel4WD
12,000 lbsShop >
Heavy Duty 3500 EC Long BedDuramax 6.6L V8 Turbodiesel4WD
12,000 lbsShop >
Light Duty 15004.3L V64WD
4,500 lbsShop >
Light Duty 1500 Long Bed4.3L V64WD
4,400 lbsShop >
Light Duty 1500Vortec 4.8L V8 SFI4WD
4,400 lbsShop >
Light Duty 1500 Long BedVortec 4.8L V8 SFI4WD
6,300 lbsShop >
Light Duty 1500 Long BedVortec 5.3L V8 SFI4WD
7,300 lbsShop >
Light Duty 1500 AWS Crew CabVortec 6.0L V8 SFI4WD
7,900 lbsShop >
Light Duty1500 Crew Cab6.0L V84WD
7,900 lbsShop >
Light Duty 1500 Crew CabVortec 6.0L V8 SFI4WD
8,200 lbsShop >
Light Duty 1500 EC4.3L V64WD
4,700 lbsShop >
Light Duty 1500 ECVortec 4.8L V8 SFI4WD
6,100 lbsShop >
Light Duty 1500 EC Long BedVortec 4.8L V8 SFI4WD
5,900 lbsShop >
Light Duty 1500 ECVortec 5.3L V8 SFI4WD
7,100 lbsShop >
Light Duty 1500 EC Long BedVortec 5.3L V8 SFI4WD
6,900 lbsShop >
Light Duty 1500 EC AWSVortec 5.3L V8 SFI4WD
7,600 lbsShop >
Light Duty 1500 Extended Cab4.3L V64WD
3,700 lbsShop >
Light Duty 1500 Extended CabVortec 4.8L V8 SFI4WD
4,100 lbsShop >
Light Duty 1500 Extended Cab Long BedVortec 4.8L V8 SFI4WD
3,900 lbsShop >
Light Duty 1500 Extended CabVortec 5.3L V8 SFI4WD
7,800 lbsShop >
Light Duty 15014.3L V64WD
5,200 lbsShop >
Light Duty 1502Vortec 4.8L V8 SFI4WD
7,100 lbsShop >
Light Duty 1503Vortec 4.8L V8 SFI4WD
8,100 lbsShop >
Light Duty 1504Vortec 4.8L V8 SFI4WD
----
Light Duty 1504Vortec 5.3L V8 SFI4WD
7,400 lbsShop >
Light Duty 1505Vortec 5.3L V8 SFI4WD
8,400 lbsShop >
Light Duty 1506Vortec 5.3L V8 SFI4WD
----
Light Duty 1507Vortec 5.3L V8 SFI4WD
9,100 lbsShop >
Light Duty 1508Vortec 5.3L V8 SFI4WD
----
Light Duty 2500 Long BedVortec 8.1L V8 330hp 450ft. lbs.RWD
8,700 lbsShop >
Light Duty 2500 Extended CabVortec 8.1L V8 330hp 450ft. lbs.4WD
8,200 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. Heavy Duty 2500 Crew Cab Long Bed, Vortec 8.1L V8 330hp 450ft. lbs., 4WD, axle 3.73 (13,700 lbs) 2. Heavy Duty 2500 Long Bed, Vortec 8.1L V8 330hp 450ft. lbs., 4WD, axle 3.73 (12,000 lbs) 3. Heavy Duty 2500 Crew Cab, Vortec 8.1L V8 330hp 450ft. lbs., 4WD, axle 3.73 (12,000 lbs) 4. Heavy Duty 2500 EC Long Bed, Vortec 8.1L V8 330hp 450ft. lbs., 4WD, axle 3.73 (12,000 lbs) 5. Heavy Duty 2500 Extended Cab, Vortec 8.1L V8 330hp 450ft. lbs., 4WD, axle 3.73 (12,000 lbs)

By highest conventional towing rating in this dataset: 1. 3.73 (up to 13,700 lbs) 2. 4.10 (up to 12,000 lbs) 3. 3.42 (up to 7,400 lbs) Always confirm your exact configuration from the manufacturer documentation and door-sticker ratings.

Top fifth-wheel capacities in this dataset: 1. Heavy Duty 2500 Long Bed, Vortec 8.1L V8 330hp 450ft. lbs., RWD, axle 3.73 (16,000 lbs) 2. Heavy Duty 2500 Long Bed, Vortec 8.1L V8 330hp 450ft. lbs., 4WD, axle 3.73 (15,700 lbs) 3. Heavy Duty 2500 Extended Cab, Vortec 8.1L V8 330hp 450ft. lbs., RWD, axle 3.73 (15,700 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.