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:
Customer Assistance for Text Telephone (TTY) Users (U.S. and Canada)
To assist customers who are deaf, hard of hearing, or speech-impaired and
who use Text Telephones (TTYs), Cadillac has TTY equipment available at its
Customer Assistance Center. Any TTY user can com ...
Fuel
Use of the recommended fuel is
an important part of the proper
maintenance of this vehicle. To help
keep the engine clean and maintain
optimum vehicle performance, we
recommend the use of ga ...
Global Positioning System (GPS)
The navigation system determines the position of the vehicle by using satellite
signals, various vehicle signals, and map data.
At times, other interferences such as the satellite condition, road c ...