Safety Belts: They're For Everyone - GMC 2000 Envoy Owner's Manual

To return the head restraints to the upright position,
reach behind the seats and pull the head restraint up
until it locks into position.
Push and pull on the head restraints to check that they
have locked in the upright position. If they haven't, have
them fixed immediately.
The rear seat head restraints are adjustable. For
information on adjusting the rear seat head restraints
see "Head Restraints" in the Index.

Safety Belts: They're for Everyone

This part of the manual tells you how to use safety belts
properly. It also tells you some things you should not do
with safety belts.
And it explains the air bag system.
CAUTION:
Don't let anyone ride where he or she can't wear
a safety belt properly. If you are in a crash and
you're not wearing a safety belt, your injuries
can be much worse. You can hit things inside the
vehicle or be ejected from it. You can be seriously
injured or killed. In the same crash, you might
not be if you are buckled up. Always fasten your
safety belt, and check that your passengers' belts
are fastened properly too.
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