2005 GMC Envoy Owner's Manual - Page 34

4. 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. 3. Your comfort guide may have an adjuster to lengthen or shorten the cord. If it does, you can adjust the cord by following these steps. 3.1. Squeeze and hold the ends of the lock (A) on the elastic cord. 3.2. Pull the loop to shorten the guide or pull the cord to lengthen the guide. 3.3. Release the lock. 1-28