OK. I can't pass inspection here in Virginia without my backup lights working. Well, they work... but only when the trans is BETWEEN park & reverse. In addition, once I'm past reverse all the gear indications are off by one. i.e. overdrive "says" neutral, third "says" second, etc. Auto trans;4.3L (Z); 4x2; LS trim. The park/neutral switch is a suspect, but with the shift indicator being wrong, I'm thing it's something else. Any ideas?