Body Control Module (BCM)
IMPORTANT:
The remote control door lock receiver (RCDLR) does not communicate on the GM LAN high speed bus. The RCDLR and the engine control module (ECM) use the BCM as a gateway in order to communicate.
The body control module is a multi-function module. The body control module (BCM) is used in the immobilizer system as a gateway for the RCDLR to send a fuel enable message to the ECM.