Chevrolet 2003 Monte Carlo Owner's Manual page 16

A safety belt that is improperly r o u 4 , not
properly attached, or twisted won't provide the
protection needed in a crash. The person
wearing the belt could be seriously injured.
After raising the rear seatback, always check
to be sure that the safety belts are properly
routed and attached, and are not twisted.
To raise the rear seatback, follow these steps:
1. Raise the seatback up and make sure it latches.
Push and pull on the seatback to be sure it is
locked in position.
2. Reconnect the center
safety belt latch plate
to the buckle.
Make sure the safety belt label is pointing to the release
button, and that both are facing the front of the
vehicle. Make sure the belt is not twisted. Push and pull
on the latch plate to be sure it is secure.
When the seat is not in use, the seatback should be
kept in the upright locked position.
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