Chevrolet 1994 Astro Passenger Owner's Manual page 50

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.
Securing a Child Restraint in a Rear Outside Position
You'll be using the lap-shoulder belt. See the earlier section about the top
strap if the child restraint has one.
1. Put the restraint on the seat. Follow the instructions for the child
restraint.
2. Secure the child in the child restraint as the instructions say.
3. Pull out the vehicle's safety belt. Make the belt as long as possible by
tilting the latch plate and pulling it along the belt.
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