GMC 2010 Canyon Crew Cab Owner's Manual page 85

2. If the child restraint manufacturer's instructions
recommends that the top tether be attached,
attach and tighten the top tether to the top tether
anchor. Refer to the child restraint instructions and
the following steps:
2.1. Pull the seatback forward to access the top
tether anchor. See Seatback Latches on
page 2-9.
2.2. Pull on the finger access tab to remove the
cover to access the top tether anchor.
2.3. Route the top tether according to your child
restraint instructions and the following
instructions:
If the position you are using
has a fixed headrest or
head restraint and you are
using a single tether, route
the tether over the headrest
or head restraint.
3. Attach and tighten the top tether according to your
child restraint instructions.
4. 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.
If the position you are using
has a fixed or adjustable
headrest or head restraint
and you are using a dual
tether, route the tether
around the headrest or
head restraint.
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