Chevrolet 2013 Express Owner's Manual page 92

3-48 Seats and Restraints
1.3. Attach and tighten the lower
attachments on the child
restraint to the lower
anchors.
2. If the child restraint manufacturer
recommends that the top tether
be attached, attach and tighten
the top tether to the top tether
anchor, if equipped. Refer to the
child restraint instructions and
the following steps:
2.1. Find the top tether anchor.
2.2. For the second, third,
and fourth row with
three-passenger seats only,
in the rear driver-side
seating positions, use
anchor point (1). For the
rear passenger-side seating
positions, use anchor
point (2). For the center
seating positions, use
anchor point (2). Never
install two top tethers using
the same top tether anchor.
2.3. Route and tighten the top
tether according to your
child restraint instructions
and the following
instructions:
If the position you are using
does not have a headrest
or head restraint and you
are using a single tether,
route the tether over the
seatback.
If the position you are using
does not have a headrest
or head restraint and you
are using a dual tether,
route the tether over the
seatback.