GMC 1997 Safari Owner's Manual page 66

5.
6.
7.
Buckle
the belt. Make sure the release button is
positioned so you would be able to unbuckle the
safety belt quickly if you ever had to.
To tighten the belt, pull its free end while you push
down on the child restraint.
Push and pull the child restraint in different
directions to be sure it is secure. If it isn't, secure the
restraint in a different place in the vehicle and
contact the child restraint maker for their advice
about how to attach the child restraint properly.
To remove the child restraint, just unbuckle the vehicle's
safety belt. It will be ready to work for an adult or larger
child passenger.
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