A system and method for forming a vehicle article carrier having a single side release crossbar assembly. The crossbar assembly includes a trigger style, horizontally arranged actuating lever that simultaneously locks and unlocks a pair of locking pins at opposite ends of the crossbar assembly from their respective support rails. The support rails are fixedly secured to an outer body surface of a vehicle such that the crossbar assembly is supported above the outer body surface. The single side release feature eliminates the need for the operator to walk back and forth to both sides of the vehicle to unlock and lock the crossbar assembly when the crossbar assembly needs to be repositioned on the support rails.