GM V8 6.0 L Engine, 2006 US EPA Label, Air Conditioner, Automatic Transmission, 4300 lb Front Axle, 8600 lb Rears, 12300 lb GVWR, 225/75R16 Front Tires, 225/75R16 Rear Tires, Spring Suspension, 160 in Wheelbase, 15 ft x 96 in Wide x 84 in High Body, Liftgate