I had my entire middle row unit replaced 15 months ago (4 months after I bought it). Got into an accident last month and it quit working again. They say it isn't from the accident, but I find it odd that it just quit right after! I'm going to attempt to fix this myself, wish me luck! GM should really do something about this, definitely defective! I will never buy another GM again! What a lemon! I won't even get into the other 6 repairs in the first 7 months.... luckily was still under warranty then.