Solution: DO NOT BUY A CAR WITH A BUILT IN SATELLITE SYSTEM.
Very hard to do these days, especially if you want a car with other amenities. Doesn't matter anyway -- if you have a smart phone, and carry it with you, you're being tracked regardless of the car you're driving.
I was just surprised that Google was tracking me even when I didn't have my phone. My car had already been linked to me, via the phone, and they continued to track through satellite connectivity. Creepy, but that's the world we live in.