Pontiac G3 2010 Owner's Manual page 80

2-50
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.
3. Push and pull the child restraint in different
directions to be sure it is secure.
If the position you are
using has an adjustable
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.