Machine description: Cat C7 6 Cylinder 7.2 L Diesel 210 hp Engine, 2004 US EPA Label, Allison Automatic Transmission, 10000 lb Front Axle, 19000 lb Rears, 25950 lb GVWR, 295/75R22.5 Front Tires, 11R22.5 Rear Tires, Spring... more info about the 2005 GMC C7500.