My 2013 t keeps launching on-star back to back 5 or more times in a row, service parking brake light comes on, center radio screen goes black and headlights flicker. This don't happen all the time, kinda comes and goes. Took it to dealership and they said it needed updated programs installed (under warrenty) few days later doing it again. Anyone else have or heard of this happening? I have another appointment next week and I'd like to have some idea of what's going on. My warrenty is up soon and I don't want to get stuck with a major bill in the future. Any information would be greatly appreciated.