The Chevrolet Silverado heavy-duty models are offered in a range of 2500HD (three-quarter-ton) and 3500HD (one-ton) models; and are available in WT, LT and LTZ trim.

New features and content changes for 2009 include a number of safety-related and convenience features that bolster an already comfortable and refined driving experience.

Silverado 2500HD and 3500HD are offered in regular, extended and crew cab configurations, which are complemented with standard (6-foot 6-inch) and long (8-foot) cargo box lengths. Silverado 3500HD models also are available with the Dually dual rear wheel configuration on a long (8-foot) box.

The standard engine is a 6.0L gas V-8 with variable valve timing. It is rated at a best-in-class 360 horsepower and 380 lb.-ft. of torque on single rear-wheel configurations (up to 10,000 pounds gross vehicle weight rating).

A Hydra-Matic 6L90 six-speed automatic transmission is paired with the 6.0L engine, giving the powertrain combination a maximum gross combined weight rating (GCWR) of 18,500 pounds.

A clean and powerful Duramax 6.6L turbo-diesel engine is available. It continues to lead the segment in power and torque, with power ratings of 365 horsepower and 660 lb.-ft. of torque.

The renowned Allison 1000 six-speed automatic transmission is partnered with the Duramax 6.6L turbo-diesel engine.