1999 GMC Savana Van Owner's Manual - Page 57
1999 GMC Savana Van Manual
Page 57 highlights
yellowblue Top Strap If your child restraint has a top strap, it should be anchored. If you need to have an anchor installed, your dealer can obtain a kit with anchor hardware and installation instructions specifically designed for this vehicle. The dealer can then install the anchor for you. This work will be done for you free of charge. Or you may install the anchor yourself using the instructions provided in the kit. Canadian law requires that forward-facing child restraints have a top strap, and that the strap be anchored. 1-51