System Operation

The vehicle horn system is activated under the following conditions:
^ The horn switch is depressed.
^ The Body Control Module (BCM) commands the horns on. The BCM commands the horns on under any of the following conditions:
- When the content theft deterrent system detects a vehicle intrusion. For further information refer to Content Theft Deterrent (CTD) Description and Operation in Antitheft and Alarm Systems.
- When the panic button is depressed on the remote control door lock transmitter. For further information refer to Keyless Entry System Description and Operation in Keyless Entry.
- When the lock button on the keyless entry transmitter is pressed twice within 5 seconds, a horn chirp will sound to notify the driver that the vehicle has been locked. For further information refer to Keyless Entry System Description and Operation in Keyless Entry.
- When the OnStar(R) system is used to sound the horn, if equipped. For further information refer to OnStar (R) Description and Operation in Cellular Phone.