Park Brake Warning

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The radio activates the park brake audible warning as requested by the body control module (BCM). The BCM sends a serial data message to the radio indicating the chime frequency and duration. The park brake warning sounds and the brake indicator illuminates when the following occurs:

The ignition is ON.
The vehicle speed is greater than 5 km/h (3.1 mph). The BCM receives a serial data message from the PCM/ECM indicating the vehicle speed.
The BCM determines that the park brake is engaged.