Pontiac G6 2009 Owner's Manual page 60

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. If you are using a forward-facing
child restraint, you may find it helpful to use your
knee to push down on the child restraint as you
tighten the belt.
6. Push and pull the child restraint in different
directions to be sure it is secure.
1-56
If the airbag is 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 on indicator is
lit, see "If the On Indicator is Lit for a Child Restraint"
under Passenger Sensing System on page 1-65 for more
information.
To remove the child restraint, unbuckle the vehicle
safety belt and let it return to the stowed position.
If your seat has a safety belt guide, insert the safety belt
into the guide on the head restraint by sliding the
webbing through the opening on the guide.