Detroit DD15 6 Cylinder Ultra Low Sulfur Diesel Engine, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Automated Transmission, 13300 lb Front Axle, 40000 lb Rears, 53300 lb GVWR, Air Ride Cab, 72 in High Rise Sleeper Cab, Bunk Beds, Aluminum Outer Wheels, 295/75R22.5, Airliner Air Ride Suspension, Air Sliding 5th Wheel, Dual Fuel Tanks