Cat C7 6 Cylinder 7.2 L Ultra Low Sulfur Diesel Engine, 2004 US EPA Label, Automatic Transmission, 8000 lb Front Axle, 19000 lb Rears, 25950 lb GVWR, 295/75R22.5, Spring Suspension, 260 in Wheelbase, Supreme 24 ft x 96 in Wide x 92 in High Body, Liftgate