Lights On Warning
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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 class 2 message to the chime producer indicating the chime frequency (fast rate) and duration (continuous). The lights on warning sounds when the following occurs:
- The ignition is OFF.
- The BCM determines that the driver's door is open and the signal circuit is low.
- The BCM determines that the headlamp switch is in the park or head position.