Trunk Lid problems of the 2001 Buick Lesabre

All 4 windows have failed. One of them twice! my dashboard is separating exactly the same way many others have described theirs. I initially had major battery issues (battery is located under back seat on driver's side - how weird is that?). I would drive my car to the store, come out, and it would not start. One time, I opened the trunk to get my jumper cables and when I slammed the trunk lid, the radio came on! then, of course, the car started just fine. After owning this possessed car with major reliability issues for several months, we found an electrical mechanic who discovered a lose wire in the manufacturers electrical work which was somehow connected to the battery. My gas gauge hasn't worked in years. I am always at 3/4 to a full tank. This is otherwise a great car, but I am seriously disappointed that Buick will not stand behind some of these repeat problems, especially the electric motors for the windows and that horrible plastic part that continues to break. Somebody from Buick should read these complaints and do something.