I’m now confident in saying that the system is working just as it would on a factory-equipped passive entry truck with the 5th antenna installed. All functions work to include the passive tailgate entry and fobik safe, which will only warn you and auto-unlock on its own if you leave the fob inside the cab.
A big thank you to
@Jimmy07 for going out of his way to work with me on getting this last bit sorted out.
Stay tuned for the how-to this weekend. I’ve got a few more photos and miscellaneous part numbers I want to get, but if all goes as planned, I hope to get it up Saturday night.