CHEVROLET 2009 Silverado - Manual (Page 11)

4. Tilt the clamp assembly so that the locator is in the
slot, pull down on the assembly, and slide the clamp
under the edge of the inner lip of the bed rail.
5. Pull the handle toward the rear of the truck to engage
the clamp. Make sure the locator is secure into the
slot (A). If unable to completely engage clamp, see
the tightening and loosening procedures later in this
section.
6. The clamp should be securely engaged. Shake
the handle assembly to make sure the handle
does not move.
7. There are locking features on the front clamps only.
With the handle in the clamped position, push the
locking tab to engage the lock.
8. Repeat the clamp attachment steps 3 through 7 for
the opposite side.
2-3