Although we can trace the Silverado name back to trim levels of the 1970s, it didn't achieve the status of a standalone model until 1999. Strengthened versions of the Silverado—dubbed HD for Heavy Duty—joined the lineup in 2001.
Chevrolet offers the Silverado 2500HD in a number of configurations. Buyers can select cab styles, rear- or four-wheel drive, and between two engines: a 6-liter Vortec V8 or a beefy 6.6-liter Duratec Diesel engine that produces 397 horsepower and 765 pound-feet of torque. When paired with an available Allison 1000 six-speed transmission, the latter enables a Silverado 2500HD to tow up to 17,800 pounds.