Graco Car Seat Harness Strap Instructions: Adjusting, Tightening and Checking the Fit
The Short Answer
Adjusting the harness on a Graco car seat comes down to four checks: the shoulder straps sit at the correct height for the seat's direction, the straps are flat and untwisted, the harness is snug enough to pass the pinch test, and the chest clip sits at armpit level. You tighten most Graco harnesses by pulling the adjuster strap at the front of the seat. You loosen them by pressing the harness release, usually a button or lever near the front of the seat shell, while pulling the shoulder straps toward you.
