Abstract: A cargo retention system is provided that allows the operator of a vehicle removably and securely fasten a cargo module to a vehicle. A guide is provided for aligning the cargo module within the retention system and aiding in the securing of the cargo to the vehicle.

Abstract: A dump box for a utility vehicle having a forward cab portion and a rearward bed portion. The dump box includes a dump box bed having a front end, first and second sides, and a rear end. A front panel is provided at the front end, the front panel dividing the cab portion of the utility vehicle from the bed portion of the utility vehicle. First and second side walls are provided that are adjustable between a first position along the sides and a second position along the front panel. A tailgate is provided at the rear end of the utility vehicle. The tailgate may be configured for rotation from both the upper and lower margin. Limiting structures may be used to limit the opening of the tailgate from the upper margin. Further, the tailgate may include a support for supporting the tailgate in an open, horizontal position.