GMC 2008 Savana Van Owner's Manual page 60

6. To tighten the belt, push down on the child restraint,
pull the shoulder portion of the belt to tighten
the lap portion of the belt and feed the shoulder
belt back into the retractor. If you are using a
forward-facing child restraint, you may find it
helpful to use your knee to push down on the
child restraint as you tighten the belt.
1-56
7. If your vehicle does not have a rear seat and your
child restraint has a top tether, follow the child
restraint manufacturer's instructions regarding
the use of the top tether. See Lower Anchors and
Tethers for Children (LATCH) on page 1-39 for
more information.
8. Push and pull the child restraint in different
directions to be sure it is secure.
To remove the child restraint, unbuckle the vehicle's
safety belt and let it go back all the way. If the top
tether is attached to a top tether anchor, disconnect it.
If you had turned the airbag off with the switch,
remember to be sure to use the airbag off switch
to turn on the right front passenger's airbag when
you remove the child restraint from the vehicle unless
the person who will be sitting there is a member of
a passenger airbag risk group. See Airbag Off Switch
on page 1-66.