Other information:
Removal
Lower the headliner.
Refer to: Headliner - Lowering (501-05 Interior Trim and Ornamentation, Removal and Installation).
Disconnect the electrical connector.
Remove the satellite radio/GPS antenna...
System Operation
BCM
The BCM
controls various systems by monitoring inputs from switches, sensors
and network messages from other modules and components on the HS-CAN1 ,
LIN and the GWM . Based on the inputs, the BCM activates outputs. For
example, the BCM monitors the HCM inputs and provides voltage to the
exterior lamps...