A box truck, or box van, is a chassis cab truck with an enclosed cuboid-shaped cargo area. On most box trucks, the cabin is separate to the cargo area; however some box trucks have a door between the cabin and the cargo area. Regular cab box trucks are generally larger than cargo vans but smaller than day cab tractor-trailers with movable trailers. Crew cab box trucks tend to be larger than crew vans but smaller than crew cab tractor-trailers with movable trailers.
The difference between a box truck and a van is that the cargo van is a one-piece (unibody), while a box truck is created by adding a cargo box to a chassis cab.
