The FBI was activating the the unit and listening to conversations
With in the vehicle.
A lower court agreed that the FBI could do this and you would never be
Aware what was happening.
But a federal appeals court said NO, they can't do this because
It causes On-Star to be deactived in case of a crash and it can't
Report to the On-Star monitoring station that the vehicle was in a
Crash and give the location to send help to.
The Federal Court never touched on the subject of it being an illegal
Wiretape. And an invasion of privacy.