Chevrolet 2007 Colorado Owner's Manual page 70

4. Pull the rest of the shoulder belt all the way
out of the retractor to set the lock.
5. If your child restraint has a top tether, attach
the top tether to the top tether anchor.
See Lower Anchors and Tethers for
Children (LATCH) on page 56.
70
6. To tighten the belt, push down on the child
restraint, pull the shoulder portion of the belt
to tighten the lap 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.