Machine description: V8 6.0 L Gasoline Engine, Automatic Transmission, 5200 lb Front Axle, 9750 lb Rears, 9750:1 Axle Ratio, 13200 lb GVWR, 235/80R17, Spring Suspension, 162 in Wheelbase, 11 ft 6 in x 96 in Bed, Receiver ... more info about the 2012 GMC SIERRA 3500.