Keyless Entry Interior Illumination
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
When the BCM receives a door unlock command from the remote keyless entry (RKE) transmitter, the body control module (BCM) will flash the park lamps several times, illuminate the courtesy and park lamps, and illuminate the low beam headlamps at low intensity. The lamps will remain on until the ignition key is turned from the OFF position, a RKE door lock command is received, or after an approximate 20-second delay.