Chevrolet Silverado Classic 2007 Owner's Manual page 76

5. Pull the rest of the shoulder belt all the way 6. To tighten the belt, push down on the child
out of the retractor to set the lock. restraint, pull the shoulder belt to tighten
the lap belt portion 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. You should not be able to pull
more of the belt out of the retractor once
the lock has been set.
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