Onstar.com

The website provides access to account information, manages the OnStar subscription, and allows viewing of videos of each service.

Get subscription plan pricing and sign up for OnStar Vehicle Diagnostics. Click on the “My Account” tab on the home page.

    See also:

    Rear Window Defogger
    The rear window defogger uses a warming grid to remove fog from the rear window. (Rear Window Defogger): Press to turn the rear window defogger on or off. The rear window defogger stays on for abou ...

    Tips and Troubleshooting Chart
    ...

    Brake System Warning Light
    The vehicle brake system consists of two hydraulic circuits. If one circuit is not working, the remaining circuit can still work to stop the vehicle. For normal braking performance, both circuits need ...