Hummer H2 2010 Owner's Manual page 90

Your child restraint may have a single tether (A) or a
dual tether (C). Either will have a single attachment (B)
to secure the top tether to the anchor.
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. 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.
2-52
Lower Anchor and Top Tether Anchor
Locations
Second Row SUV 60/40
Bench
(Top Tether Anchor):
Seating positions with top
tether anchors.
(Lower Anchor):
Seating positions with two
lower anchors.