GM Duramax V8 6.6 L Diesel 300 hp Engine, 2006 US EPA Label, Webasto Engine Coolant Heater, Air Conditioner, Power Windows, Exhaust Brake, Allison Automatic Transmission, Differential Lock, 8000 lb Front Axle, 13500 lb Rears, 17500 lb GVWR, 385/55R22.5, Spring Suspension, 169 in Wheelbase, 8 ft 8 in x 80 in Bed, aluminum fuel tank w/ 15 GOM pump, 5-wheel hitch