hey everybidy, i have a 2006 envoy denali. today i opened my passenger side door and when i went to close it, it didnt latch! after messing with the latch on the door itself and spraying it down with wd-40 i had no luck. i pushed the latch down with a screwdriver and it doesnt lock. any one know if the latch could be broken and how expensive and difficult it could be to fix?