Why does the right hand door mirror, locks, door lights on our 2003 Chevy Silverado not work? It isn't a fuse problem.We have checked all the fuses. I also have problem with it not starting at times. Have to shift in and out of park several times to get it to start. I am thinking that problem is a bad neutral safety switch, but can't figure out why all of the sudden why none of the electrical stuff works on the passenger side.