I’m still dealing with this.
After I posted this in September, the last thing the dealer said was they’d have to replace the radio. I assumed they had ordered parts and would call me when they came in but apparently not. They never called and I just kind of forgot about it because I don’t listen to the radio that much, figured I’d get it taken care of eventually. I was kind of holding out hope there would be another software update rather than have to replace hardware.
I had an appointment for a separate issue in early February so I asked them to revisit it. There was a new software update at that time which they applied. It put my problem back to where it was when the truck was new (prior to the first update I got in September).
The current state of the issue after that update is: I can set and use AM/FM favorites like normal. When I try to set a Sirius channel it sets to the tab most of the time, but the tab is completely blank. It does not display the channel name. When I try to press on the tab it just says “favorite unavailable” (90% of the time, some channels will actually work, seems like it depends on the channel and the day).
I let the dealer know, they took a look at it again this week during another unrelated service visit to confirm that’s true. They have now actually ordered the parts to replace the radio, backordered with no ETA.