Please it has location service built in, press the button it knows where you are. Make a call it knows where you are, airbags deploy, it knows where you are, report the car stolen it knows where it is...
So yeah it knows where you are, just as digital phone GPS and older analog "trakker" triangulation knows where you are. So big secret, GSM in call (with vin and account number as identifiers) and GPS in non call mode.
And again if it's a service and "privacy" issue that's one thing, but the safety issue is a non starter. The real problem is Chet just wasn't that creative, the focus of the product was to make it in car AOL when it could have a much broader safety impact.
IBM's product can do it, can do it safely... Vonage can do it, heck ven TriaGnoSys GmbH has a product that will do it.
So don't tell me the technology doesn't exist, if the parent company GM doesn't want to play because they are banking on this junior telematics system turning into in car AOL..well that would be a "real" reason...not that it can't be done and can't be done safely.
SOT II
Good Luck with your theory. You obviously do not see the Why not reasons.
Additionally, if you think that Onstar is tracking you, you have no idea on how the system works or what it's capabilities are.