Just found out yesterday after the new soft cloth car wash ripped my rear wiper off! There is a GM service something(they are not calling it a recall) but a problem with the rear wiper and car washes. Anyway, GM is going to fix and replace it for me for free. The reason I am posting it is because when I first called the dealership they said that there was nothing about it in the system but my great service people checked further and found it. So beware of the carwash!