Buick 1994 LeSabre Owner's Manual page 50

Wherever you install it, be sure to secure the child
restraint properly.
Keep in mind that an unsecured child restraint can move
around in a collision or sudden stop and injure people in
the vehicle. Be sure to properly secure any child
restraint in your vehicle -- even when no child is in it.
If your child restraint has a top strap, it should be
anchored.
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