Machine description: Detroit V8 Diesel 350 hp Engine, 1985 US EPA Label, Eaton Fuller 13-Speed Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, 52000 lb GVWR, 315/80R22.5 Front Tires, 11R22.5 Rear Tires, Hendrick... more info about the 1985 GMC J9500.