Graco 8486 Owner's Manual page 21

11. Check that the straps are inserted at the same
level and that they are not twisted. From the
front of the seat, pull on harness to make sure
it is secure.
12. Harness Adjustment
Remove child from car seat. From behind the seat
move the red lock up, lift adjuster bar and lengthen
or shorten the straps as needed.
(See also Section 6.3, Securing Your Child in the
Car Seat, page 26.)
REMEMBER to check the shoulder and crotch
straps as your child grows and move them to the
next position when necessary.
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