I have this on-star thingie in my car, and last winter when we were going up skiing and snowboarding, I contacted them for information.. When we were through talking, they said good bye Mr. Syncro have a nice drive up Hwy 49 22 miles from Kirkwood.
LOL they know where my car is at all times, I can disable it if I want to though.
I'd have it removed. Its very eery to know that this "Big Brother" type service is monitoring your every move.