Was installing my new seat covers,I opened the pass side KC door and there was rust on the back inside edge of the door!,right above the hinge..

.Drove to the dealer and showed it to Mr.service guy..Gonna drop it off on Monday for issues so far.
1.Rust on door
2.AC weak on really hot and humid days
3.Loud thump when i shift into rev or drive from park.
4.weird *** rubbing noise from the front end whenever i make a hard left.