GM Service Manual Online
For 1990-2009 cars only

Some child restraints have a top strap, or "top tether," which can help hold the child restraint during a crash. For it to work, a top strap must be properly anchored to the vehicle. Some child restraints with a top strap are designed to be used whether or not the top strap is anchored. Others require that the top strap be anchored. Also, a national or local law may require that the top strap be anchored.

If your child restraint top strap must be anchored, then do not use the restraint in this vehicle, because in it, a top strap cannot be properly anchored.