It sounds like the BCM is going out here are the taillight wiring diagrams so you can see how the system works and I have included how to change out the BCM in the images below. 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 so we can see what's going on.
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Saturday, April 29th, 2023 AT 1:18 PM