Chevrolet 2002 Prizm Owner's Manual page 46

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CAUTION:
If a head restraint is not installed on the seatback
properly, it could be thrown about the vehicle in
a crash or sudden maneuver. People in the vehicle
could be injured. Be sure the head restraint is
properly installed when using the built
child restraint.
3. Install the head restraint so that the front side faces
the rear of the vehicle. Lower the head restraint so
that it touches the top of the seatback. Make sure
there is no gap between the lower edge of the head
restraint and the top of the seatback.
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in