A carry-over from 2005, the Sierra 1500 is a full-size pickup truck offered in Regular, Extended and Crew Cab configurations. Trim levels are the base WT (work truck), SLE, and SLT, available in either two or four-wheel-drive. You also have a choice of bed length, with 5.8’, 6.6’ or 8’, for those who need to carry a 4x8 sheet of wood. The base engine is the 4.3Liter V6 (195HP) with a manual transmission on the WT, or the 4.8Liter V8 that produces 295HP on the SLE and SLT. There is also an optional 5.3Liter(315HP) V8 and the aluminum head version that increases the horsepower to 335 or a 6.0Liter V8 that generates 367HP. All models are offered in both two-and four-wheel-drive configuration.