'15 Suburban various service warnings pop-up, go away & entire screens goes blank
 

In the last few weeks, warnings started popping up. Not the same one every time. Service trailer brake system, warning bell, hours later, went away. DVD playing suddenly says, no disk inserted and then goes away, pops up 20 minutes later. Entire readouts go blank and then pop-up. Stabili track pops up and goes away. Park assist enables itself in a driveway and locks the brakes and steering. Other messages pop up. My vehicle works great and then a few warnings pop-up and truck acts weird. Is this a fuse? Main memory? Short in the circuitry? If I turn engine off, these warnings and issues temporarily go away. Thoughts?

Welcome to the forum.
if it is out of warranty, I would disconnect the battery for a couple of minutes and then reconnect it. If that doesn't work, then I would have the battery tested. Most auto parts stores will do that for free. If it is still in warranty and those don't work, I will take it to the dealer.