GMC Canyon Owner's Manual page 58

Some child restraints that have a top tether are
designed for use with or without the top tether
being attached. Others require the top tether
always to be attached. In Canada, the law requires
that forward-facing child restraints have a top
tether, and that the tether be attached. In
the United States, some child restraints also have
a top tether. Be sure to read and follow the
instructions for your child restraint.
If the child restraint does not have a top tether,
one can be obtained, in kit form, for many
child restraints. Ask the child restraint
manufacturer whether or not a kit is available.
58
Lower Anchor and Top Tether Anchor
Locations
Crew Cab — Rear Seat
Extended
Cab — Rear Seat
i
(Top Tether Anchor):
Seating positions with
top tether anchors.
j
(Lower Anchor):
Seating positions with
two lower anchors.
i
(Top Tether Anchor):
Seating positions with
top tether anchors.
j
(Lower Anchor):
Seating positions with
two lower anchors.