GMC 2003 Savana Van Owner's Manual page 58

Anchor the top strap to this bracket. For the second row
only, in the left outboard seating position, use anchor
point (A). For the right outboard seating position, use
anchor point (6). For a center seating position, use either
anchor point (A) or (6).
Lower Anchorages and Top Tethers
for Children (LATCH System)
If you have a passenger van,
it
may have the LATCH
system. If it does, you'll find two sets of anchors (A)
in the second row of seats in the driver and passenger
side seating positions, where the seatback meets
the seat cushion.
In order to use the system, you need either a
forward-facing child restraint that has attaching
points (B) at its base and a top tether anchor (C), or a
rear-facing child restraint that has attaching points (B),
as shown here.
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