2012 Buick Verano - warning lights, info center shuts off

The information center shuts off and warning lights come on A wrench in shape. It says to check the traction control system. It does this intermittently the whole time driving the car. Have had it into the shop several times and they say they can’t find a problem. No radio no nothing when this happens. Just warning lights flashing The car has 50,000 miles on it and has been doing this since it had 30,000.