Cadillac 2010 DTS - Manual (Page 94)

If the vehicle has roof-rail airbags for the driver, right
front passenger, and second row outboard passengers,
they are in the ceiling above the side windows.
{ WARNING:
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.
Do not use seat accessories that block the inflation
path of a seat-mounted side impact airbag.
Never secure anything to the roof of a vehicle with
roof-rail airbags by routing a 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
2-62