A multi-functional cargo area assembly for a cargo bed of a vehicle includes a first and a second side wall disposed in a transversely spaced relationship, and an integrally formed guide track in the first and second side walls. The cargo area assembly also includes extendible side wall 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 side walls, wherein the divider panel includes a positioning mechanism for fixedly locating the divider panel.