GMC Safari 2003 Owner's Manual page 58

Lower Anchorages and Top Tethers
for Children (LATCH System)
If you have a passenger van it has the LATCH system.
It has two sets of anchors (A) in the second row of
seats. In a seven passenger van, the anchors are
located in each of the bucket seats in the second row.
In an eight passenger van, the anchors are located
in the driver and passenger side seating positions of the
second row bench seat.
1-52
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.