Remote Control Door Lock Receiver (RCDLR)
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The console passive antenna is controlled by the RCDLR. The RCDLR will send an AC voltage signal and provide ground to the console passive antenna when the ignition mode switch is rotated. This will enable the console passive antenna to send out a low frequency broadcast challenge to a transmitter. The RCDLR also has an internal radio frequency (RF) antenna to receive the transmitters passively or actively sent responses. The RCDLR is responsible for sending the fuel enable message to the ECM if all the requirements are met.