Horn

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

    See also:

    If Steam Is Coming from the Engine Compartment
    See Overheated Engine Protection Operating Mode for information on driving to a safe place in an emergency. ...

    Roadside Assistance Program
    U.S.: 1-800-252-1112 TTY Users (U.S.): 1-888-889-2438 Canada: 1-800-268-6800 Mexico: 01-800-466-0818 As the owner of a new Buick, you are automatically enrolled in the Roadside Assistance prog ...

    Unable to Connect to OnStar Message
    If there is limited cellular coverage or the cellular network has reached maximum capacity, this message may come on. Push to try the call again or try again after driving a few miles into ...