I have a 2018 Chevy. I get emails from the dealership that tells me when a light goes off on my dashboard. OnStar will give me monthly reports about my driving tendencies (average speed, aggressive acceleration, etc.).
So now that I know big brother has access to my car, am I able to disconnect it from the grid?
You would also need to take the GPS antenna out of the loop to the device. Will likely create a maintenance error code as it serves as a geo tracking device full time potentially when power is off as well ( whether currently being done or not).