Reverse Warning
WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
The radio activates the reverse audible warning as requested by the body control module (BCM). The BCM sends a class 2 message to the radio indicating the medium rate chime frequency and a continuous duration. The reverse warning sounds when the following occurs:
- The ignition is ON with the engine ON.
- The vehicle is in reverse for at least one second.