Windshield wipers suddenly stopped working. I swapped out the relay. It was not the problems. Dealer replaced the wiper motor ($300). Only one month later the wipers failed again. Dealer now says the wiper motor AND the wiper transmission both failed. New repair cost $425! In 50 years I've owned almost every make of car; Porsche, Audi, BMW, Ford, Chevrolet, Lexus, Toyota, Nissan and on and on. Cadillac is the first car I've owned that A) timing chain failed and now, B) Windshield Wipers have failed. This will be my last GM (Garbage Motors) car.