The 2007 GMC Sierra Classic truck is available as the 1500, 2500, 3500, and Denali series. The 1500s carry an MSRP ranging from $16,740 to $36,420. Models start at the two to three passenger regular cab and move through the extended and crew cabs. Short, standard, and long boxes are available. Engine options include a 4.3-liter as both a V6 and a V8; a 5.3 liter V8 with a version for the use of FlexFuel, and finally a 6-liter V8.

The 2500HDs have an MSRP range of $24,575 to $40,550. The available configurations include a two to three passenger regular cab long box, a five to six passenger extended cab (as a standard and long box), and a five to six passenger crew cab (as both a standard and long box.) Available engines include a 6-liter V8 generating 353 horsepower and a 6.6-liter V8 producing 365 horsepower.

The 3500HDs range from $24,795 to $40,780 and are long box regular, extended and crew cab models. Engine options are identical to the 2500HD. The Denali ($38,995 to $42,095) is a five to six passenger crew cab. The engine is a 6.2-liter V8 generating 403 horsepower.

The 2007 GMC Sierra 1500 series has a towing capacity of up to 10,500 lbs; the 2500HD up to 15,800 lbs; the 3500HD to 16,500 lbs; and the Denali up to 8,600 lbs.