GMC 1997 Safari Owner's Manual page 62

Where to Put the Restraint (Cargo Vans)
The child restraint must be secured properly in the
passenger seat. Never put a rear-facing child restraint in
this vehicle. Here's why:
A child in a rearfacing child restraint can be
seriously injured if the passenger's air bag
inflates. This is because the back of a rearfacing
child restraint would be very close to the inflating
air bag. Do not use a rearfacing child restraint in
this vehicle.
If a forward-facing child restraint is suitable for
your child, always move the passenger seat as far
back as it will
go.
Keep in mind that an unsecured child restraint can move
around in a collision or sudden stop and injure people in
the vehicle. Be sure to properly secure any child
restraint in your vehicle
--
even when no child is in it.
Top Strap
If your child restraint has a top strap, it should be
anchored. If you need to have an anchor installed, you
can ask your GM dealer to put it in for you. If you want
to install an anchor yourself, your dealer can tell you
how to do it.