Body control module location, or GEM if that is the correct item

I need to replace the BCM/gem,
The following symptoms:

Power door locks don’t work.
Remote door locks don’t work.
Door locks lock/unlock on their own.
Horn continuously blows.
Door ajar light on continuously.
Anti-lock brake light on continuously.
Radio does not turn off when door opens and key is out.
Parasitic battery drain.
Overdrive off button doesn’t work.

Otherwise truck seems to work fine
These issues started 01/2011, and has slowly over the years gotten worse, (started with continuous horn), latest items are parasitic battery drain and door locks have a mind of their own. I pulled the horn fuse in 1/11, just pulled door lock fuse 2/21.