This sounds like the BCM is out. To be sure lets do a CAN scan which is the future of automotive repair. you can get a CAN scanner from Amazon for about $50.00. here is a video to show you how:
Here are instructions you can replaced the BCM in the diagrams below. Check out the diagrams (below). Please let us know what happens.
Images (Click to enlarge)
Wednesday, February 10th, 2021 AT 10:28 AM