Issues with Onstar, WiFi, GPS, Supercruise | Traverse Forum A few weeks ago - No Onstar, no gps, WiFi, Supercruise… System test found code U1615 Apparently there is a service bulletin #PIT6214 with message #B19DA for this problem So GM is aware with no repair at this time Dealership did a global relearn and said everything was working for now But nope! The only thing I can see that is working is