GMC 1995 Safari Owner's Manual page 47

6. 'T'o tighten the belt, pull its free end while you push down on the child
restraint.
7. Push and pull the child restraint in different directions to be sure it is
secure. If the child restraint isn't secure, turn the latch plate over and
buckle it again. Then see if 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.
Securing a Child Restraint in the Right Front Seat
Position
You'll be using the lap-shoulder belt. See the earlier part about the top strap
if the child restraint has one.
1. Put the restraint on the seat. Follow the instructions for the child
restraint.
2. Secure the child in the child restraint as the instructions say.
3. Pick up the latch plate, and run the lap and shoulder portions of the
vehicle's safety belt through or around the restraint. The child restraint
instructions will show you how.
If the shoulder belt goes in front of the child's face or neck, put it
behind the child restraint.