Chevrolet 2005 Uplander Owner's Manual page 65

5. To tighten the belt, push down on the child restraint,
4. Pull the rest of the shoulder belt all the way out of
pull the shoulder portion of the belt to tighten the lap
the retractor to set the lock.
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.
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