A pivoting cage cargo is formed of opposing gate assemblies mounted on the rearwardmost D-pillar of a pick-up
truck and movable from a folded, collapsed storage position against the respective side walls of the cargo box into multiple selectable operative configurations. The pivoting cage cargo
retainer can be positioned in two different transversely extending positions that span the cargo
bed when the gate assemblies are connected together. In one transverse position, the coupled gate assemblies cooperate with a lowered tailgate to provide a
bed extension function. The other transverse position spans across the cargo
bed to provide a divider function. Each gate
assembly is also positionable into a storage container configuration that defines a small cargo retention area adjacent the side wall for the retention of small objects, such as grocery bags. A latching mechanism retains the gate
assembly next to the side wall.