Where is the BCM located?

Hello, the Body Control system in this vehicle is made up of two different modules, the Instrument Panel Module, and the Rear Integration Module. Do you want wiring diagrams for both or are you looking for a specific problem?
Diagrams 4 and 5 are the Instrument Panel Module and diagrams 6 and 7 are the Rear Integration Module.

https://www.2carpros.com/articles/how-to-replace-a-bcm-body-control-module