Machine description: Detroit V8 8.2 L Diesel 230 hp Engine, 1986 US EPA Label, CARB Compliant, 5-Speed Manual Transmission, 12000 lb Front Axle, 23000 lb Rears, 35000 lb GVWR, Air Ride Cab, 255/80R22.5 Front Tires, 265/75... more info about the 1987 GMC C7.