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), Buick has TTY equipment available at its Customer Assistance Center. Any TTY user ca ...

Horn
Press near or on the horn symbols on the steering wheel pad to sound the horn. ...

XM Categories (Radio with CD and Touchscreen)
Adding or Removing Categories 1. From the Home Page press the Config screen button or the CONFIG button on the infotainment system. 2. Select Radio Settings from the Config Menu list. 3. Se ...