Cummins 6 Cylinder 6.7 L Diesel Engine, 2012 US EPA Label, 4986 Engine hrs, Automatic Transmission, 5500 lb Front Axle, 9350 lb Rears, 12300 lb GVWR, 235/80R17, Spring Suspension, 169 in Wheelbase, 8 ft 4 in x 93 in Bed, Aluminum Frame, 5th Wheel Hook-Up