Cummins 6 Cylinder 6.7 L Diesel Engine, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Exhaust Brake, Automatic Transmission, 5500 lb Front Axle, 9350 lb Rears, 13000 lb GVWR, 235/80R17 Front Tires, 205/75R17.5 Rear Tires, Spring Suspension, 172 in Wheelbase, Knapheide 9 ft Body