Body problems of the 2010 Cadillac CTS

My rear tail lights for my wagon have separated from the top of the car due to poor design. Spoke with Cadillac & gm, both refuse to believe it's a design flaw on the wagon models. Both stated car out of warranty due to mileage/year. Asked if they could tell me what was used to attach lamps to vehicle, neither has a clue. Dealer wants $2100 to replace, but no guarantee that it won't happen again. Since January 2019, car has been to dealer 3 times for car not starting on 1st try. First time, negative battery cable tightened, 2nd time replaced positive battery cable, 3rd time dealer has no idea as to what is causing the issue. All lights on dash come on, engine does not turn over while parked. It will start on the 2nd try, sometimes it hesitates. Dealer told me to continue to monitor until vehicle breaks down.

Door locks freeze up. The drivers door froze up when I stopped to get gas (while I was on vacation in TN) could not open door from inside or out. That was in 9/2015 I was told it was a fluke! paid over $600 for repair. Yesterday I went to get in my vehicle on the passenger side door would not open! same sceniro cannot open from inside or out!.

Tl-the contact owns a 2010 Cadillac Cts. The contact stated while the vehicle was parked, the vehicle was three inches full of water on the drivers side in the vehicle. There was no warning indicators illuminated and the problem occurred once. The contact stated that the vehicle was not taken to a mechanic and not diagnosed. The vehicle was not repaired and the manufacturer was notified. The approximate failure mileage 70,000. Rw.

Every time it rains, the inside of my vehicle floods through the ceiling and floors. This is a manufacture defect that is outside of my control. This is a safety issue because it causes mold and mildew in the vehicle which is a hazard to inhale. I'm also concerned that the possibility exist for an electrical hazard.