Graco Extend2Fit Instruction Manual page 49

8. Lock Vehicle Seat Belt
In most vehicles today, slowly pull the
shoulder belt all the way out and then
let it go back in. You will hear a clicking
sound. Slowly pull out on the belt and
it should be locked. If not, review your
car's owner manual and section 9-D.
9. Tighten the Vehicle Seat Belt
Press down firmly in the center of the car
seat. Pull on the shoulder belt to tighten
while feeding the slack back in the retractor.
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