Pontiac G5 2009 Owner's Manual page 11

Head Restraints
Adjust the head restraint so that the top of the restraint
is at the same height as the top of the occupant's head.
This position reduces the chance of a neck injury in a
crash.
Pull the head restraint up to
raise it. To lower the head
restraint, press the button,
located on the top of the
seatback, and push the
restraint down.
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