Body Control System Description and Operation
The body control system consists of the body control module (BCM), communications, and various input and outputs. Some inputs, outputs and messages require other modules to interact with the BCM. The BCM also has discrete input and output terminals to control the vehicle's body functions. The BCM is wired to the high speed GMLAN serial data bus, low speed GMLAN serial data bus and Multiple LIN buses and acts as a gateway between them.
Data Link Communications Description and Operation
Note. This is an overview of different serial data buses used by GM control modules to communicate with each others. Use schematics to find out which serial data buses are configured for a specific vehicle.