GM Vortec V8 6.0 L Gasoline 341 hp Engine, 2019 US EPA Label, 3815 Engine hrs, 6-Speed Automatic Transmission, 4300 lb Front Axle, 8600 lb Rears, 3.73:1 Axle Ratio, 12300 lb GVWR, 225/75R16, Spring Suspension, 154 in Wheelbase, Supreme 16 ft x 96 in Wide x 80 in High Body, Walk-Up Ramp .