Cadillac 2006 CTS Owner's Manual page 55

3. 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.
4. 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.
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