Lights On Warning
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 chime producer activates the lights on warning as requested by the body control module (BCM). The BCM sends a serial data message to the chime producer indicating the chime frequency and duration. The lights on warning sounds when the following occurs:
- The ignition is OFF.
- The BCM determines that the driver door is open.
- The BCM determines that the headlamp switch is in the park or head position.