Chevrolet 2008 Equinox Owner's Manual page 53

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 an adjustable
headrest or head restraint
and you are using a
dual tether, route the
tether 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 an adjustable
headrest or head restraint
and you are using a
single tether, raise the
headrest or head restraint
and route the tether
under the headrest or
head restraint and
in between the headrest
or head restraint posts.
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