GMC 2007 Envoy Denali 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
Second Row
i
(Top Tether Anchor):
Seating positions with
top tether anchors.
j
(Lower Anchor):
Seating positions with
two lower anchors.
To assist you in locating
the lower anchors, each
seating position with
lower anchors has
two labels, near the
crease between the
seatback and the
seat cushion.