I wish I did. They collect a pervasive amount of data from all customers, not just the ones who pay for the connected service (like remote lock/unlock from an app). So the car keeps its internet connection no matter what unfortunately.
One thing I looked into was removing the modem from the head unit. They store the cell modems in the head units (radio), so if you can find a tutorial for your specific car you could pull it out one day and completely unplug the cell modem. That's the only thing I've found to be able to stop the tracking & data collection. Issue with that is dealers and people on the GM forums think you're insane for wanting to do this. A dying percent of us care about privacy anymore, it's sad
One thing I looked into was removing the modem from the head unit. They store the cell modems in the head units (radio), so if you can find a tutorial for your specific car you could pull it out one day and completely unplug the cell modem. That's the only thing I've found to be able to stop the tracking & data collection. Issue with that is dealers and people on the GM forums think you're insane for wanting to do this. A dying percent of us care about privacy anymore, it's sad