Door Ajar Warning

The audio amplifier activates the door ajar audible warning as requested by the body control module (BCM). The BCM sends a GMLAN message to the radio indicating the chime frequency of a medium rate and continuous duration. The door ajar warning sounds and the door ajar indicator illuminates when the following occurs:

• The BCM determines that the driver door is open and the signal circuit is low. The IPC also receives a GMLAN message from the BCM requesting illumination of the door ajar indicator.
• The vehicle is not in PARK. The BCM receives a GMLAN message from the ECM/BCM indicating the gear position.