2006 GMC Envoy Owner's Manual - Page 52

For five-passenger vehicles, the labels are located above a flap, at the base of the seatback, in the rear outside seating positions. The anchors are located under the flap. In order to get to the anchors you will need to pull the strap at the center of the seat where the seat cushion meets the seatback. This will allow you to fold the seat cushion up and out of the way. Lift the flap to expose the anchors and then lower the seat cushion. Be sure the cushion is locked into place. Five-Passenger Vehicles For five-passenger vehicles, the top tether anchors for each rear seating position are located on the floor in the cargo area of your vehicle. Do not use the rear tie-down brackets near the liftgate for attaching top tethers. Be sure to use an anchor located on the same side of the vehicle as the seating position where the child restraint will be placed. 1-46