I have 2015 Silverado dble cab. It also has sudden pitch-blackouts of mylink screen & entire dash display. Sometimes lasts for minutes, sometimes hrs. It's downright unsafe when traveling at night on unlit roads--lose speedometer, clock, radio, gps, maps, gear reading...just all sudden full blackout. Recent was on narrow dark road, no turnout, w/trailer... ...GM pushed this complaint beyond warranty -- though complaints were made on day one. Should have xld sale right then. Wild excuses by Svc Depts.