2004 Hummer H2 Owner's Manual - Page 12

Head Restraints Pull straight up on the head restraint to raise it and push it down to lower it. The front head restraints can also be tilted forward in addition to being slid up or down. To tilt either of the front head restraints do the following: Pull the head restraint toward you until you hear a click. Then let go. The head restraint will stay in this position unless you pull it forward more until another click is heard. There are four positions available: initial position, first click, second click, and third click. After the third position (three clicks) is reached, pulling the head restraint farther will release it back to the normal upright position. The rear head restraints can be slid up or down just as the front head restraints, but they do not tilt. 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. 1-6