A rocker molding-step (14) for a vehicle body side assembly (12) includes one or more support brackets (30), an elongated molding-step (28), a series of fasteners (74), and an appliqué (76). The fasteners (74) attach molding-step (28) and support brackets (30) to an outboard surface (18) of vehicle body side assembly (12), with the support brackets (30) sandwiched between the molding-step (28) and the body side assembly (12). The molding-step (28) has a stepped surface (72) receiving the fasteners (74). The appliqué (76) is attached to molding-step (28) and covers the fasteners (74). The molding-step (28) is a single-piece blow-molded construction, which covers the vehicle body side assembly (12) and provides a foothold.