[mikegett]

There are GM vehicles that ran the air bag through the radio. Most of the GM vehicles use a data bus that controls various electronics on the car. Some of those devices were ran through the radio. On our cars, it seems to be the chimes or the service engine light deepending on the year and model. I have talked to various GM techs and the air bag was not placed through our system. If you would still like to have circuit city do the install (since it should be free) have them call a GM technician while you are there. I have stressed on this site before, do not expect for car radios to be interchangable without a data modual in the near future. We manufacture GM and Toyota HU's. Nearly every model for 2006 will either run a dedicated data link like GM's or use digital outputs.