2003 GMC Envoy Owner's Manual - Page 36

To remove and store the comfort guides, remove the hook from the loop. Slide the guide back into its storage pocket located on the side of the seatback. Safety Belt Extender If the vehicle's safety belt will fasten around you, you should use it. But if a safety belt isn't long enough to fasten, your dealer will order you an extender. It's free. When you go in to order it, take the heaviest coat you will wear, so the extender will be long enough for you. The extender will be just for you, and just for the seat in your vehicle that you choose. Don't let someone else use it, and use it only for the seat it is made to fit. To wear it, just attach it to the regular safety belt. 3. Be sure that the belt is not twisted and it lies flat. The elastic cord must be under the belt and the guide on top. 4. Buckle, position and release the safety belt as described in Rear Seat Passengers on page 1-23. Make sure that the shoulder belt crosses the shoulder. 1-29