System Operation
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- The vehicle horns are activated whenever the horn switch is depressed.
- The BCM commands the horns ON under any of the following conditions:
- When the panic button is depressed on the remote control door lock transmitter. For further information refer to Keyless Entry System Description and Operation (with Accessory 2 Way Remote) or Keyless Entry System Description and Operation (without Accessory 2 Way Remote) .
- When the keyless entry system is used to lock the vehicle, a horn chirp may sound to notify the driver that the vehicle has been locked. The notification feature may be enabled or disabled through personalization. For further information, refer to Keyless Entry System Description and Operation (with Accessory 2 Way Remote) or Keyless Entry System Description and Operation (without Accessory 2 Way Remote) .
- When the OnStar® system is used to sound the horns if equipped. For further information, refer to OnStar Description and Operation .