Cadillac CTS 2018 Owner's Manual page 96

SEATS AND RESTRAINTS 95
Wherever a child restraint is installed,
be sure to follow the instructions that
came with the child restraint system
and secure the child restraint system
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
the vehicle - even when no child is
in it.