2004 GMC Envoy Owner's Manual - Page 60

{CAUTION: If something is between an occupant and an air bag, the bag might not inflate properly or it might force the object into that person causing severe injury or even death. The path of an inflating air bag must be kept clear. Do not put anything between an occupant and an air bag, and do not attach or put anything on the steering wheel hub or on or near any other air bag covering. Do not let seat covers block the inflation path of a side impact air bag. If your vehicle has a right front passenger's side impact air bag it is located in the side of the passenger's seatback closest to the door. 1-54