Chevrolet 2009 Express Owner's Manual page 48

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 (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:
1-44
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.