2006 GMC Canyon Owner's Manual - Page 14

Head Restraints Your front seats may have adjustable head restraints. If your vehicle has rear seats, they may have adjustable head restraints. Pull up on the head restraint to raise it. To lower the head restraint, press the button located on top of the seatback and push down on the head restraint. Adjust the 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. 1-8