2008 GMC Sierra 1500 Pickup Owner's Manual - Page 62

{CAUTION: If something is between an occupant and an airbag, the airbag might not inflate properly or it might force the object into that person causing severe injury or even death. The path of an inflating airbag must be kept clear. Do not put anything between an occupant and an airbag, and do not attach or put anything on the steering wheel hub or on or near any other airbag covering. If your vehicle has roof-rail airbags, never secure anything to the roof of your vehicle by routing the rope or tie down through any door or window opening. If you do, the path of an inflating roof-rail airbag will be blocked. Driver Side shown, Passenger Side similar The roof-rail airbags for the driver, right front passenger, and second row outboard passengers are in the ceiling above the side windows. 1-58