I've had this "Grayed-out" problem for months and months. Just got my software updated to 22.9 and it did NOT fix the problem. I have a great dealer Service Dept and they must be tired of me complaining about me losing my presets. Well with the 22.9 software update not fixing the problem, I told the service dept that the next time I bring it in, they should phone the Buick Tech Line to fix it.
Since the 22.9 upgrade, the problem is worse than before the upgrade, losing presets between three times a day to at best, every other day.
Now I decided to try something different before I take car back in.
Went to Settings.
Then to Systems.
Then to Favorites.
Then to Audio.
Then I DELETED all my audio favorites.
Then went back to my audio screen, and not only were all my presets gone, (which I wanted) but also no Grayed out areas. Screen looked like when it came from factory, ready to enter presets.
I then entered all the 15 presets I wanted. Ten SXM, two AM and three FM (two of the FM have HD).
Went back into Settings, Systems and Favorites but this time, I set the number of favorites shown to 15 from my previous 20 or 25.
The display in the DIS between the tach and speedo was not correct, but on the next start up, it booted up correct.
It's been three days now and so far, all is operating corrrctly. (KNOCK ON WOOD). Will see how long it lasts. If it continues working good, I'm not going to do TSB for the Fish Eye Camera as I can live with the camera as it is.
Keeping my fingers crossed!!!!