Machine description: Diesel Engine, 6907 Engine hrs, Allison AT545 Automatic Transmission, 7000 lb Front Axle, 15900 lb Rears, 22800.0 lb GVWR, 9R22.5, Spring Suspension, 150 in Wheelbase, PTO, 13 ft Body Closing Time: 20... more info about the 1983 GMC C6500.