But don't worry, the FTC is out to protect you. Their settlement with GM says that can only sell your name attached to zipcode resolution location data and only sell your precise location trace attached to an opaque ID rather than your name.
More fair to say that you satisfied your level of concern. But it's entirely not schizo for someone to be concerned that there was more than one tracking vector, especially given that manufactures already active inhibit efforts to disable tracking and ordinary practices of the automotive industry.
Or, in other words, please don't privacy shame people. If you felt your approach was sufficient-- awesome! Better to be nothing like the people who were others names online for asking about disabling telematics at all, only to be all shocked pikachu when their insurer jacked their rates later based on their driving activity. :P
Or if you take it in for service and they plug the antenna in. Better than nothing, but if your privacy and security depends on not being constantly tracked it's not good enough.