In some cars, you can yank the OnStar module without ill effects. If you're not a subscriber, it may be something to look into. I did this on my father's 2008

In some cars, you can yank the OnStar module without ill effects. If you're not a subscriber, it may be something to look into. I did this on my father's 2008 GMC Sierra and we replaced it with a BlueStar[1] bluetooth adapter. It works flawlessly and mimics OnStar functionality down to muting the radio and stopping A/C fans for voice control. It's far nicer than most aftermarket Bluetooth mods. [1] http://www.costartech.com/pb/products/bluestar.html http://www.costartech.com/pb/products/bluestar.html