Does anyone know if you can upgrade the stock "no radio control" steering wheel with one that has it? I have the stock unit 6 cd/mp3 changer with Sirius but no steering wheel controls. Does mine even have the wiring connectors sitting unused in the column? I suppose if the wheel's avail you'd have to switch out the original drivers airbag onto the new wheel as well. Sounds like a dealer-installed upgrade I'd imagine.