A liftgate is attached to the back of a truck to help with unloading.

What is a liftgate?

A liftgate is a piece of trucking equipment that allows cargo to be lowered to the ground from the back of a truck. Liftgates are used in situations where the cargo cannot be unloaded in any other way, like with a loading dock. 

The trucker will charge a liftgate fee if they must provide a liftgate at a delivery destination.