Detroit 7.0 L Diesel 240 hp Engine, US EPA Label, Eaton Fuller 9-Speed Manual Transmission, 12000 lb Front Axle, 20000 lb Rears, 32000 lb GVWR, Steel Wheels, 11R22.5 Front Tires, 11R22.5 Rear Tires, GMC Spring Suspension, 141 in Wheelbase, Dual Fuel Tanks

Cummins 6 Cylinder Diesel Engine, Engine Brake, Eaton Fuller 9-Speed Manual Transmission, Air Ride Cab, 48 in Flat Top Sleeper Cab, Aluminum Wheels, 11R22.5 Front Tires, 295/75R22.5 Rear Tires, Air Ride Suspension, 214 in Wheelbase, Air Sliding 5th Wheel, Headache Rack, Dual Fuel Tanks