I have been following this discussion for several weeks now but only now posting for the first time to get comment from several of you. I know we spoke about the JD's suburban having Onstar on it. But then there was a discussion about whether it was paid for, or enabled.
Onstar will track the vehicle regardless because they resell that data to traffic data companies.
See article here
OnStar Tracks Your Car Even When You Cancel Service
It would be interesting to get your comments, If this was covered already pls ignore and my apologies.