2005 GMC Sierra 1500 Extended CAB towing capacity

The 2005 GMC Sierra 1500 Extended CAB is published in 9 configurations, with tow ratings ranging from 6,700 to 8,700 lb depending on cab, bed, drivetrain, and hitch class. The peak figure (8,700 lb) sits in full-size truck and SUV territory.

The table below lists every trim of the 2005 GMC Sierra 1500 Extended CAB with the engine, drivetrain, axle ratio, horsepower, torque, GVWR, curb weight, and payload that go with that trim's headline tow rating. Manufacturers often publish more than one tow figure per truck — a conventional bumper-hitch rating, a weight-distributing rating, and a gooseneck or fifth-wheel rating — so the highest number here is the maximum across all hitch classes the source carries for the trim.

Per-trim breakdown

How to interpret the headline tow figure

Tow ratings at this level are normally achievable with a conventional Class II or Class III receiver hitch. Always verify your vehicle has the manufacturer's tow package installed if you intend to tow at the upper end of the rating, and inspect the door-jamb sticker for the actual maximum permitted on your specific configuration.

How this year compares to 2004

The 2004 GMC Sierra 1500 Extended CAB carried a maximum tow rating of 10,000 lb. The 2005 model is rated 1,300 lb lower — sometimes a real spec change, sometimes a re-test under a stricter standard like SAE J2807. See the 2004 GMC Sierra 1500 Extended CAB page for the full per-trim breakdown of the prior year.

Other 2005 GMC models

The rest of GMC's 2005 lineup, ranked by maximum tow rating. Click through for the per-trim breakdown of any of these.

All figures sourced from manufacturer documentation. See our methodology for how the dataset is compiled. Always confirm against your vehicle's door-jamb sticker before towing.