A loading ramp for a vehicle having a storage area is disclosed, wherein the loading ramp may also serve as a substantially weather tight door for the storage area. The loading ramp comprises a frame structure attached to the vehicle by angled extension members that allow the bottom of the frame to extend below the floor of the storage area. The loading ramp is pivotally attached to the frame. A dovetail structure is built onto the angled extension members, the dovetail being angled to match the angle of the ramp. A hydraulic cylinder and automatic control system is also provided to assist in raising and lowering the ramp.