GM Vortec 6.0 L Gasoline Engine, 2003 US EPA Label, CARB Compliant, Air Conditioner, Automatic Transmission, 4100 lb Front Axle, 6084 lb Rears, 9600 lb GVWR, LT245/75R16, Spring Suspension, 143 in Wheelbase, Supreme 12 ft x 80 in Wide x 72 in High Body, Curbside Door, Liftgate, Box A/C