2015 Silverado High Country 71K Mi.

It has exhibited intermittent electrical problems for the last year with the infotainment system, power windows and power mirrors. Several times I have parked the truck and come back to find the mirrors in the folded position and three times (today most recent) all of the windows were completely down but doors still locked. The radio will switch between different views showing all XM channels and the single view of one channel. Today the lawyer warning screen telling you not to take your eyes off the road for an extended time would not go away when pressing OK. There is no rhyme or reason to these occurrences - just random.
I remember finding a post some time ago telling of a bad ground under the dashboard on the body control module but cannot locate that post again.
any help?

 

Any updates?

Was any work done just before these gremlins started acting up? New stereo/sound system? Remote starter?