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?
We have two Silverados an we disconnected the OnStar antennas and the power supplied to the module. Pretty simple procedure. Here's an example: https://www.youtube.com/watch?v=UN2YR1KSBJ4