Dead infotainment - 2020 Silverado

[Carlton Blanks]

Back over the winter I started having an issue where the infotainment system on my 2020 Silverado 1500 Duramax would not start on cold mornings. It was just completely blank.
A few weeks ago I took it to the dealer (still under warranty) and they were able to confirm that the "radio" was bad and needed to be replaced. This was encouraging as a lot of what I was reading on the web said most dealers were not acknowledging the problem, or else calling it a software issue and sent the owner on their way with a useless software/firmware update. I'm no car expert but I am a computer expert and I'm pretty certain that cold weather usually affects hardware, not software.
Anyway, they said the part was backordered from GM and would call me back when the part came in. 3+ weeks later and it's still backordered.
Anyone else having this problem and stuck waiting for the part?  Is my dealer clueless about how to fix this?
There's also this:
https://gmauthority.com/blog/2020/09/ge ... nt-issues/

[Carlton Blanks]

They did try to fix it via running diagnostics, but now instead of an intermittently working system, I now have a system that perpetually reads "Calibration required..."

[wb5rag]

similar issue with my radio in the 2021 silverado crew cab 4x4 V-8.  it won't hold max startup volume, won't hold equalizer settings, etc.  haven't had it during winter so don't know about that issue.  so far my comments have gone to the dealer but they say there is no service bulletin out. hmmm

Edited May 24, 2021 by wb5rag