Pontiac G6 2009 Owner's Manual page 55

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 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.
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.
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