Side/window Air Bag problems of the 2003 Cadillac Deville

On may 3, 2010, my friend was driving my 2003 Deville, the side airbags deployed from the vehicle without a collision with another vehicle. They deployed on their own,smoke fill the vehicle, the force of the airbags push her so hard , then their was great pain coming from her left arm it started to swell then it bruised. The force of the bags knock the passenger window off track, and the driver mirror is damage. The vehicle was taken to one Cadillac dealer where we found that general motor had down sized taken the dealership. Next we took the car to crest Cadillac, they didn't know who to blame. The vehicle was left at dealer their overnight, little help their but only a bill. It has taken her since may to get some resolve with GMC. This Monday August 22,2010 they will send a investigator to look at the vehicle, this investigator will come from chicago, the car is in milwaukee wisconsin. He tells her it will take 7 to 8 hours to find a module and to upload pictures to GMC. She is a senior, when talking with the first GMC employees they were very rude, but that the way business is these days. She is under the doctor care, we want to know why did those side airbags deployed?.