2010 GMC Acadia Owner's Manual - Page 120

3-66 Seats and Restraints If the airbags are off, the off indicator in the passenger airbag status indicator will come on and stay on when the vehicle is started. If a child restraint has been installed and the on indicator is lit, see "If the On Indicator is Lit for a Child Restraint" under Passenger Sensing System on page 3‑39 for more information. 5. Pull the rest of the shoulder belt all the way out of the retractor to set the lock. 6. To tighten the belt, push down on the child restraint, pull the shoulder portion of the belt to tighten the lap portion of the belt and feed the shoulder belt back into the retractor. When installing a forward-facing child restraint, it may be helpful to use your knee to push down on the child restraint as you tighten the belt. 7. Push and pull the child restraint in different directions to be sure it is secure. To remove the child restraint, unbuckle the vehicle safety belt and let it return to the stowed position.