Cadillac 2004 DeVille - Manual (Page 50)

3. Buckle the belt. Be sure the latch plate clicks when
you put it into the buckle. This means you are using
the correct buckle. Also 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.
5. Push and pull the child restraint in different
directions to be sure it is secure.
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