I was fed up with mine (see my post above) and somehow it was magically fixed during my trucks stay at the dealer last week for an unrelated battery issue.
I took it in because twice in the past year I’ve had a dead battery, and twice they’ve told me nothing was wrong. Well last week it happened again and thankfully it stored two codes, an emissions code (P0456), and one for a module in the PCM not initializing correctly.
The dealer replaced my battery, reprogrammed the PCM, and now the climate control works flawlessly. I don’t know if maybe there was a software update done that the dealer didn’t note on the invoice, because I can’t imagine either of those actions would have an effect on the climate control. However, I’ve been driving the truck for three days with the system set to 68 degrees in auto and it’s been absolutely perfect. Not once have I thought about the temperature in the cab, which is the whole point of having climate control.
I don’t know if any of this is really helpful, but I would take the truck in and have it looked at because it can be fixed.