The Duramedic is a lightweight module for the lower GVWR chassis. The Duramedic UltraLight is designed specifically for the Chevrolet K3500 4x4 chassis. Combined with the air ride suspension it is a comfortable ride for the patient and often preferred for long transports. The chassis for this module is available in 2-wheel drive and 4-wheel drive and is very mechanic friendly. Whether in demanding terrain or hilly areas, the 4x4 chassis is a requirement. Because of the shorter module the Duramedic Type I is perfect for city streets.