Remote Keyless Entry Exterior Lamp Illumination
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
When the remote function actuator (RFA) module receives a door unlock command from the remote function actuator transmitter, the RFA module will ground the door unlock signal circuit to the body control module (BCM) and send a class 2 message to the BCM, indicating that an UNLOCK command has been received. The BCM will then flash the park lamps twice. With all the doors closed and the remote keyless entry (RKE) transmitter used to lock the doors, the park lamps will flash twice.