Remote Control Door Lock Receiver (RCDLR)
WARNING: This page is about a different car, the 2007 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
The remote control door lock receiver (RCDLR) is a multi-function module located in the upper passenger side of the dash panel. The RCDLR can be accessed by removing the upper dash pad. The RCDLR controls all the vehicles antennas for passive and active keyless entry, as well as vehicle theft deterrent and vehicle starting. The RCDLR will send an AC voltage signal and provide ground to the door handle antennas. This will enable the antennas to send out the low frequency broadcast challenge to a key fob in range.