Download OnStar's vehicle mobile app and control remote commands & more right from your smartphone. Available for Chevrolet, Buick, GMC and Cadillac.

Go beyond the ordinary with the vehicle mobile app. Keep track of your estimated fuel level, tire pressure and oil life; check your odometer; and so much more. If anything isn’t up to par, …

SAFETY SERVICES RIGHT ON YOUR PHONE Get family safety services — Roadside Assistance, help in a crash, family locator and Emergency Services — with the OnStar …

Download the OnStar Guardian app today. When experiencing roadside trouble, you and your loved one can use the Guardian app to get help for any car or motorcycle. In a crash, the …

Help in a crash, Roadside Assistance and access to Advisors anywhere you go, for any family member, all on your phone.

Learn how to use the OnStar Guardian App to activate Mobile Crash Response, call for Roadside Assistance, locate family members and more.

Learn how to activate the mobile app for your Chevrolet, Buick, GMC or Cadillac vehicle, and other frequently asked questions on the official site.

4 days ago · Read here to learn how to set up your My Vehicle Mobile App. Follow these important steps so you can properly activate your vehicle mobile app today.

OnStar ® is a name that has stood for in-vehicle safety for over 25 years. The OnStar Guardian™ app lets you and your family take that experience anywhere you go.

Nov 5, 2025 · Get family safety services — Roadside Assistance, help in a crash, family locator and Emergency Services — with the OnStar Guardian® app. No matter where you are, we're …