2007 GMC Sierra 1500 Pickup Owner's Manual - Page 18

Head Restraints Seatback Latches The front seatbacks fold forward to allow access to the rear of the cab. To fold the seatback forward, lift the lever located on the outboard side of the seat cushion. {CAUTION: If the seatback is not locked, it could move forward in a sudden stop or crash. That could cause injury to the person sitting there. Always push and pull on the seatback to be sure it is locked. To return the seatback to the upright position, push the seatback rearward until it latches. After returning the seatback to its upright position, push and pull on the seatback to make sure it is locked. Adjust the head restraint so that the top of the restraint is at the same height as the occupant's head. This position reduces the chance of a neck injury in a crash. Pull the head restraint up to raise it. Push the head restraint down to lower it. The rear seats may have head restraints that can be adjusted up and down. 18