A fully collapsible lightweight mount to support a cargo loading apparatus. The mount has releasably attached horizontal and vertical arms, with a bracket to adjustably attach a cargo loading device on the vertical arm. In one embodiment, the horizontal arms have brackets configured to attach to “stake holes” in the standard side walls of a pickup truck cargo bed. The vertical arm of the device may be further supported against for example, a cargo bed forward wall or floor by a floor brace. Alternatively horizontal arm may attach to a pickup truck trailer hitch by additional mounts and connecting arm components suitable for attachment to a class 3 trailer hitch. The component parts can be readily assembled and disassembled, are lightweight, and occupy little space. The disassembled device can be stored in a carrying bag in the cab or other compartment of a vehicle.