GM 6 Cylinder 4.8 L Gasoline Engine, 2012 US EPA Label, Air Conditioner, Cruise Control, Automatic Transmission, 4300 lb Front Axle, 8600 lb Rears, 12300 lb GVWR, 235/65R16 Front Tires, 235/65R16 Rear Tires, Spring Suspension, 180 in Wheelbase, Supreme 16 ft x 96 in Wide x 84 in High Body