If your vehicle is a Z06, an anchor bracket for a top strap is located behind the passengers's seat in the cargo area. Anchor the top strap to the bracket.
If your vehicle is a convertible or has a removable roof panel, do not secure a child restraint with a top strap in the passenger's position 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 this position.