GMC 1997 Safari Owner's Manual page 55

Using the vehicle's regular safety belts on a child
seated on the child restraint cushion can cause
serious injury to the child in a sudden stop
or
crash. If a child is the proper size for the built-in
child restraint, secure the child using the child
restraint's harness. But children who are too
large for the built-in child restraint should sit on
the vehicle's regular seat and use the regular
safety belts.
WARNING! FAILURE TO FOLLOW THE
MANUFACTURER'S INSTRUCTIONS ON THE
USE OF THIS CHILD RESTRAINT SYSTEM
CAN RESULT IN YOUR CHILD STRIKING THE
VEHICLE'S INTERIOR DURING A SUDDEN
STOP OR CRASH. SNUGLY ADJUST THE
BELTS PROVIDED WITH THIS CHILD
RESTRAINT AROUND YOUR CHILD.
2.
If
the left and right halves of the shoulder harness
clip are fastened together, separate them.
3. Place the child on the child restraint cushion.