2003 GMC Sierra 1500 Pickup Owner's Manual - Page 14

Head Restraints The rear seat head restraints in your vehicle may be adjustable. They work the same as the front seat head restraints, except they do not tilt forward and rearward. Seatback Latches If the seatback isn't locked, it could move forward in a sudden stop or crash. That could cause injury to the person sitting there. Always press rearward on the seatback to be sure it is locked. The seatbacks fold forward to let you access the rear of the cab. Adjust your head restraint so that the top of the restraint is closest to the top of your head. This position reduces the chance of a neck injury in a crash. To raise the head restraint pull up on the head restraint. On some models the head restraints tilt forward and rearward also. To fold a front seatback forward, lift the lever at the base of the seat to release the seatback. The lever is located on the outboard side of the seat cushion. 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. 1-7