Truck Bed Enclosure Assembly

A truck bed enclosure assembly for securing contents of a truck bed and attached cabinets includes a lift module and a shell. The lift module is mountable to a bed of a truck, wherein the bed comprises a platform and a pair of sidewalls that define a central pathway. The shell is attached to the lift module so that the shell is selectively positionable in an extended configuration and a lowered configuration. In the extended configuration, the pair of sidewalls and the central pathway are accessible to a user. In the lowered configuration, opposed side panels of the shell bracket and at least partially cover the sidewalls of the bed and a rear panel of the shell covers an opening to the central pathway. The shell thus deters access to the sidewalls and to the central pathway.