How do you  loosen harness on graco car seat?
 The most common way to loosen the harness is via a lever or button between baby's feet. Sometimes the release mechanism is hidden beneath a flap. On this car seat, you loosen the harness by lifting a flap, pushing on the lever beneath, and pulling out on the harness straps. If your car seat doesn't have a front adjuster, you'll need to check the instruction manual to find out where you loosen and tighten the more harness. 