97 LX 450 just started doing this. If I start the truck and shift to reverse, the R indicator lights up and the D indicator lights up too. Same thing if I shift to Drive, both the D and R light up at the same time. All other gear indicators light up as they should. Truck will start in Park or neutral like it's supposed to. Trans shifts normal and I don't see any other problems. I'm thinking it might be the NSS? Any ideas on what to check?