Due to all the chatter about failed BECMs, GM's Technical Service Bulletin 18-NA-261 document has probably been attached somewhere in another post. That said, here it is. I was surprised to see the March 9, 2022 "Version 2" update that specifically references the new PN 24296900, and added the 2019 model year. The original version from 2018 referenced the old faulty PN.
My 2018 Volt is at the dealer for this issue right now. I assumed the service department would have quick access to these documents, but they seemed to be searching for it as of our last call. Makes me wonder if the updated version will also come to their attention. It should, but at the moment, I seem to know as much as they do about this particular problem. Share this document for others who need to know!