Suddenly after leaving costco gas station and driving "no" display of millage. speed gauges and all critical information went blank/black on drivers dash board with critical lights display showing trouble with vehicle by displaying yellow; and red exclamations; skid tire and no gauge readings for engine temkp; or nothing!. on star gave negative results for emergency help. dealer stated car was reprogramed last week. previous radio and blue tooth trouble reported to gm. they seem to ignore me. troubled radio and navigation purposively fixed last week