A vehicle article carrier having a locking mechanism disposed within a bracket member. The locking mechanism includes an actuating member having first and second camming surfaces, a locking pin and a clamping member. As the actuating member is moved to an unlocked position, the first camming surface cooperates with the locking pin to urge the locking pin out of engagement with an aperture in a channel of a support member of the vehicle article carrier. Simultaneously, the second camming surface causes the clamping member to be moved out of clamping engagement with shoulder portions of the channel member. When the actuating member is moved from the unlocked to the locked position, the first camming surface allows a first spring to urge the locking pin back into engagement with the aperture in the channel member. Simultaneously, the rotation of the actuating member causes the second camming surface to allow the clamping member to be urged back into clamping engagement in response to a biasing force provided by another spring. Accordingly, a dual locking and unlocking action is provided with movement of a single actuating member.