Graco 1786988 User Manual Page: 45

Lap belts with retractors may or may not hold a
child restraint securely.
Follow these steps to determine if you have a
retractor system that will hold child restraint
a. Pull belt all the way out
b. Allow belt to retract about 6 inches (15 cm)
c. Pull out on belt again.
If belt is locked and you cannot pull the belt out
any further, you have an Automatic Locking
Retractor which may be used as a child restraint.
Remember, when installing a child restraint, pull
belt all the way out, buckle belt, and then tighten.
If you can pull the belt out again (step c above),
you must have an Emergency Locking Retractor
which MUST NOT be used with a child restraint.