2008 Pontiac G6 Owner's Manual - Page 56

If the position you are using does not have a headrest or head restraint and you are using a dual tether, route the tether over the seatback. If the position you are using has a headrest or head restraint and you are using a dual tether, route the tether under the headrest or head restraint and in between the headrest or head restraint posts. If the position you are using has a headrest or head restraint and you are using a single tether, route the tether under the headrest or head restraint and in between the headrest or head restraint posts. If the headrest or head restraint is adjustable, pull up on the headrest or head restraint to access the top tether anchors. If the headrest or head restraint is fixed, there should be a gap to route the strap under the headrest or head restraint. Do not route the top strap around the headrest or head restraint. 3. Push and pull the child restraint in different directions to be sure it is secure. 1-52