I have a 2004 Cavalier with manual locks. When it gets cold out the locks will not turn on the passenger or driver side. I have to go back and forth for a while before it will unlock the door which still takes a lot of force. I took the car to the dealer and they sprayed graphite in the locks and said that is all they could do because they seemed fine in their nice warm shop. This did not solve anything. I then took it upon myself to remove the door panel and try to spray all parts with WD-40 which also did not do anything. Does anyone have any ideas on why this happening or what can be done to fix it?
Thanks