2012 Buick LaCrosse Owner's Manual - Page 59

Seats and Restraints Front Seat Rear Seat 3-3 Push down on the head restraint after the button is released to make sure that it is locked in place. If you are installing a child restraint in the rear seat, see "Securing a Child Restraint Designed for the LATCH System" under Lower Anchors and Tethers for Children (LATCH System) on page 3‑42. To raise or lower the head restraint, press the release button located on the side of the head restraint and pull up or push the head restraint down and release the button. Pull and push on the head restraint after the button is released to make sure that it is locked in place. The front head restraints are not designed to be removed. Pull the head restraint up to raise it. To lower the head restraint, press the release button, located on the head restraint post on the top of the seatback, while you push the head restraint down.