2009 CTS4 2007 STS
Recently had an accident where my rear bumper had to be repainted. I take it that it had to be removed but now I'm having issues with the parking assist not working. When I put the car in reverse the red light inside just blinks. No matter how close i get to anything behind the car. Before the bumper was painted everything worked fine and I checked it before I left the repair shop just to make sure it was operating. Is it anyway to check it or diagnostic codes that would be set. There isn't anything on the DIC.