I have a 06 lucerne cx model, that my wife was vacuming yesterday, she moved the drivers seat back 1/2 way and now it won't go forward. it will still go backwards if you want it to as well as up and down and recline, but however far back you keep moving it, it stays there..any suggestions..it happened once before for like two days , then all of a sudeen started working again, over two years ago..thanks