how can I find out if someone has opened an onstar account on my vehicle to track me?

We do not monitor or otherwise track the location of OnStar-equipped cars, unless required to by a valid court order in criminal procedures or under exigent circumstances. Additionally, to prevent the possibility of abuse, we require police involvement for Stolen Vehicle Assistance and missing person requests. We take your privacy, safety, and security very seriously. To view your OnStar subscription status, you can push your blue OnStar button at any time to speak with a live Advisor. They will be in the best position to assist with your security questions or concerns. If you need an additional layer of assistance moving forward, you can email socialmedia@gm.com with ATTN: OnStar Community/P43 in the subject headline.