If you’re an OnStar Member, you can set up an account in your GM Account or tie your OnStar service plan to your existing account. Visit your GM Account and follow the instructions there.

You can push your blue OnStar button, call 1.888.4ONSTAR (1.888.466.7827), or refer to your Member card or OnStar monthly diagnostics report for your OnStar account number. 

Your GM Account is where you can view, manage and change your OnStar* plan and find plans and pricing information tailored to your vehicle. Specifically, you can add to or select a different plan, get your vehicle mobile app information, review diagnostic information,* receive vehicle support, manage maintenance and service, access an online Owner's Manual, and review helpful how-to content. Log in using your GM Account, OnStar account, vehicle mobile app or GM Rewards* login.