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  1. Sign in to your GMC account to manage OnStar plans and services.

  2. 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.

  3. Sign in to your GM Owner Center account to manage your OnStar plans and services.

  4. You can push your blue OnStar button, call 1.888.4ONSTAR (1.888.466.7827), visit your account on the Owner Centre or refer to your OnStar monthly diagnostics report for your OnStar account number. Get Help & Support.

  5. If a different email account was used to create your myGMC Account (and as the sign in for your myGMC mobile app), you can link that account with your OnStar account by following the steps below: 1. Sign in to your myGMC Account in a desktop browser, OR. 2. Open and log in to your myGMC mobile app. 3. Select Account icon (circle with initials).

  6. Compare plans and pricing. There are lots of ways we help keep you safe and connected. We’ve got plan options, and we bet one of them will fit you perfectly. OnStar provides you with safety, security, evolving in-vehicle technology, multimedia entertainment, and integrated conveniences to simplify your daily life.

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