When driving at 60 miles an hour in the interstate the engine stopped and the shift moved to N. The car was on, message on the screen âplease start❠and I could manage the car to go to the side of the road until complete stop. The car was towed to a Cadillac dealer and the engine had to be replaced. Very scary situation and than God nothing happened. GM offered to extend the engine warranty but would not provide a good explanation or confirm the issue was fixed and wont happen again.