I just purchased a 2003 GMC 3500 4x4 dump truck. when I shut it off I can't remove the key from the ignition switch without pushing the shift lever up a bit. It seems like the spring that holds the shift lever up it loose or maybe there is an adjustment to it to keep the lever up in position, it only has to move about a 1/2" up and the key comes out. Is this something that has an adjustment or does something need to be replaced. In either case can you give instructions or is this better off at the dealership? Thanks