"A body design that appeared very early in history of light-duty trucking, a delivery car or van was actually the first type of panel truck." A panel truck is similar in function to its smaller cousin the sedan delivery, a station wagon with no backseat and no side windows aft of the front doors. Both types of vehicles are frequently used as delivery vehicles. Chevrolet HHR Panel LT Panel trucks are often used by construction and maintenance contractors and were sometimes configured for ambulance and hearse roles. Other variations include canopy express models, which have open display areas behind the driver's seat primarily used by farmers for selling fruits and vegetables."