Lights On Warning
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. 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.