Hummer 2006 H3 - Manual (Page 13)

Head Restraints
Adjust the head restraint so that the top of the restraint
is at the same height as 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 head
restraint down.
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