Chevrolet 2012 Express Owner's Manual page 94

3-48 Seats and Restraints
anchor point (A). For the
rear passenger-side seating
positions, use anchor
point (B). For the center
seating positions, use
anchor point (B). 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.
If the position you are using
has an integrated headrest
or head restraint and you
are using a dual tether,
route the tether around the
headrest or head restraint.