The 2011 Chevrolet Silverado 2500HD is offered in regular cab, extended cab or crew cab body styles. The regular cab is only available with a long bed (8 feet), while the extended and crew cabs can also be had in standard bed lengths (6.5 feet). Trim levels start at the base Work Truck and climb to the LT and range-topping LTZ. The Work Truck trim level includes 17-inch steel wheels, air-conditioning, a trip computer, vinyl floor coverings, a 40/20/40 split front bench with fold-down center armrest, vinyl upholstery, a tilt steering wheel and a four-speaker AM/FM stereo. Stepping up to the LT adds alloy wheels, tinted rear windows, keyless entry, full power accessories, carpeted floor coverings, cloth seats, a leather-wrapped steering wheel, driver-side lumbar adjustments, cruise control, OnStar, satellite radio and a CD/MP3 player. Many of the LT features are available on the Work Truck as options.