GMC 2006 Savana Owner's Manual page 52

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.
Lower Anchor and Top Tether Anchor
Locations
Second Row
1-46
i
(Top Tether Anchor):
Seating positions with top
tether anchors.
j
(Lower Anchor):
Seating positions with
two lower anchors.
See the information following for installing a child
restraint with a top tether in the second row center
position.
Do not install three child restraints in the rear seat and
never install two top tethers using the same top
tether anchor.
Third and Fourth Row
with Three Passenger
Bench Seat
i
(Top Tether Anchor):
Seating positions with top
tether anchors.