See also:

How OnStar Service Works
Automatic Crash Response, Emergency Services, Crisis Assist, Stolen Vehicle Assistance, Vehicle Diagnostics, Remote Door Unlock, Roadside Assistance, Turn-by-Turn Navigation, and Hands-Free ...

Radio Menus (Radio with CD)
Radio menus are available for AM and FM. Turn the TUNE/MENU knob to open the main radio menu for that band. Selecting a Band Press the RADIO/BAND button to choose AM, FM, or XM, if equipped. The la ...

Customer Assistance for TextTelephone (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 ...