Yep, it sounds like the BCM is out causing this issue, to be sure we can do a CAN scan, you can get a CAN scanner (Controller Area Network) from Amazon.
Here is a video to show you how:
https://youtu.be/u-4syLc-ifQ
and
https://www.2carpros.com/articles/can-scan-controller-area-network-easy
Here is the location of the BCM, you can get a preprogrammed unit by searching Google or Ebay. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.
Images (Click to make bigger)
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Sunday, January 29th, 2023 AT 5:49 PM