Machine description: Caterpillar 3116 6 Cylinder 6.6 L Diesel 250 hp Engine, 1995 US EPA Label, CARB Compliant, 5-Speed Manual Transmission, 3800 lb Front Axle, 6000 lb Rears, 8600 lb GVWR, 225/70R19.5, Spring Suspension,... more info about the 1991 GMC TOP KICK.