Just took our 2021 Yukon XL AT4 in for an oil change and a 3rd row seat recall. There were 3 other recalls. One was a software update for the entertainment system. When they pushed the update to the system, it crashed our entire entertainment system. Now the system no longer works at all. So the WiFi, TVs, radio, gps, all of it is dead. Parts are on back order for an unknown amount of time. Has anyone had this happen? If so how long did it take to get a replacement. We of course have a huge road trip planned and they have no Yukon XLs to loan. We have 3 kids and now no entertainment system for our brutally long drive. GMC dealer had no info for us.