I have a 2020 ram with the 12" display. I installed the OEM trailer brake controller (82215278AE) today. The install is very easy for a DIY. Only problem is when I reconnected the negative battery terminal and started the truck, all my apps and convenience controls are gone. SiriusXM no longer there, backup camera gone, heated/ventilated seat features are all gone. I know I have to get the truck flashed to recognize the TBC, but why did all that happen? I have an appointment on Tuesday for the software flash, I hope it works. If anyone has questions about the physical install let me know.