Suppose it depends on your car. Mine did nothing when I removed it. Of course you may lose access to some things you want, like XM Radio, OnStar, GPS, etc (us

Suppose it depends on your car. Mine did nothing when I removed it. Of course you may lose access to some things you want, like XM Radio, OnStar, GPS, etc (usually all these are integrated into the same board in the shark fin on top of the car).