OnStar Services

See also:

Customer Assistance for Text Telephone (TTY) Users
To assist customers who are deaf, hard of hearing, or speech-impaired and who use Text Telephones (TTYs), Buick has TTY equipment available at its Customer Assistance Center. Any TTY user can comm ...

Engine Oil Life System
The engine oil life system calculates engine oil life based on vehicle use and displays the CHANGE ENGINE OIL SOON message when it is time to change the engine oil and filter. The oil life system sho ...

Three-Way Calling
Three-way calling must be supported on the Bluetooth phone and enabled by the wireless service carrier. 1. While on a call, press . The system responds with “Ready,” followed by a tone. 2. Say ...