2005 GMC Envoy Owner's Manual - Page 48

For 7 passenger vehicles, if the position you are using has an adjustable head restraint, raise the head restraint and route the top strap under it. See Head Restraints on page 1-9. Top Strap Anchor Location {CAUTION: Each top tether bracket is designed to anchor only one child restraint. Attaching more than one child restraint to a single bracket could cause the anchor to come loose or even break during a crash. A child or others could be injured if this happens. To help prevent injury to people and damage to your vehicle, attach only one child restraint per bracket. Once you have the top strap anchored, you will be ready to secure the child restraint itself. Tighten the top strap when and as the child restraint manufacturer's instructions say. Five-passenger Vehicles For five-passenger vehicles, there is a top strap anchor for each rear seating position. The anchors are located on the floor in the cargo area of your vehicle. Do not use the rear tie-down brackets near the liftgate for top straps. 1-42