1999 GMC Suburban Owner's Manual - Page 57

yellowblue Top Strap Suburban models: If you need to have an anchor bracket installed for a second row seat or a center rear seat, you can ask your dealer to put it in for you. If you want to install the anchor yourself, your dealer can tell you how to do it. Anchor brackets for the third row outside seat positions are located on the floor in the cargo area. If your child restraint has a top strap, it should be anchored. 1-51