GMC 2018 Terrain Owner's Manual page 94

tether to the top tether anchor,
if equipped. Refer to the child
restraint instructions and the
following steps:
2.1. Find the top tether
anchor.
2.2. Route, attach and tighten
the top tether according
to your child restraint
instructions and the
following instructions:
If the position you are using
does not have a headrest
or head restraint and you
are using a single tether,
route the tether over the
seatback.
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.
Seats and Restraints
If the position you are using
has an adjustable headrest
or head restraint and you
are using a dual 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.
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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