6 Cylinder Ultra Low Sulfur Diesel Engine, US EPA Label, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Allison Automatic Transmission, 10,000 lb. Front Axle, 21,000 lb. Rears, 33,000 lb. GVWR, Air Ride Suspension, 226 in. Wheelbase, Johnson 21 ft. Long x 96 in. Wide x 96 in. High Body, Curbside Door, Side Liftgate