I am so glad I found this thread. I am on a sunny road trip with my 2024 3500 Duramax which is is disconnecting it's trailer controller and chimming constantly as I tow my TT with 300 watts solar & 1.000 miles to go!!!
I will try disconnecting solar and or removing #84 fuse and try to keep my sanity! I will give an update to see if this cures the issue.
Interestingly the last trip was cloudy and I did not have this issue.