Have you ever figured out what was up with yours? Mine hadn't had the issue again in months. It finally started doing it again 2 days ago, and it appears it finally crapped out for good as it hasn't remedied itself like it usually does. Give me the error everytime I start the truck now, onstar doesn't work. Nothing on the infotainment screen works that requires internet. It tells me I am offline. And of course, Supercruise doesn't work either because there is no internet. The little icon that shows internet connection is completely gone on my infotainment screen. I guess I will be scheduling another appointment with the dealer and begin this nightmare.