GMC 2005 Safari Owner's Manual page 55

Passenger Van Bench Seat (Third Row)
Bench Seats: An anchor bracket is located at the rear
of the seat cushion near the top rear of the seat leg
for each outboard seating position of the second row.
For the third row, an anchor bracket is located at
the rear of the seat cushion of the center seating
position.
If you have adjustable head restraints, raise the head
restraint and route the top strap under it.
Do not secure a child restraint with a top strap in the
right front passenger's position, the second row
center position, or the third row outside positions if a
national or local law requires that the top strap be
anchored, or if the instructions that come with the child
restraint say that the top strap must be anchored.
There is no place to anchor the top strap in these
positions.
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 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.
This system, designed to make installation of child
restraints easier, does not use the vehicle's safety belts.
Instead, it uses vehicle anchors and child restraint
attachments to secure the restraints. Some restraints
also use another vehicle anchor to secure a top
tether strap.
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