Crazy enough the same thing happened to me Thursday. I was drivin' home, I heard a 'thunk', and my window just started sliding down (driver side, back window). So today we popped off the panel, looked at the inside, and I am lost. I've done this many times with my firebird...but this is beyond me. Any help will be greatly appreaciated before tomorrow. Tom. I will be taking it to the dealer for a quote on the fix.
(yr 2000, front passenger window doesn't work, driver window doesn't like to go up, and now this! Crazy thing, the back windows are hardly used, no kids, and usually only one person is in the car to even want to use the passenger windows)