A multi-functional cargo area assembly for a cargo bed of a vehicle includes a first and a second sidewall disposed in a transversely spaced relationship, and an integrally formed guide track in the first and second sidewalls. The cargo area assembly also includes extendible sidewall portions. The cargo area assembly further includes a movable divider panel supported with the guide track by a support rod, and extending transversely between the first and second sidewalls, wherein the divider panel includes a positioning mechanism for fixedly locating the divider panel.