GMC 1995 Safari Owner's Manual page 44

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. Tilt the latch plate to adjust the belt if
needed. If the shoulder belt goes in front of the child's face or neck, put
it behind the child restraint.
4. 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.
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