Graco 8474 Owner's Manual page 30

Final Safety Check: Every time
you drive with your child,
PUSH DOWN on the top of the infant restraint
slowly but firmly to make sure the vehicle belt
does not lengthen at all and that the vehicle
belt is fastened very tightly around the infant
restraint/base .
Holding the infant restraint near the vehicle belt
path, TWIST AND PULL the seat forward and to
both sides to make sure the vehicle belt does not
lengthen or loosen and the infant restraint does
not easily move .
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