1997 Chevy 1500 ccsb, every since I have owned the truck the reverse lights are on in park. No matter how much you wiggle the shifter in reverse they do not come on there. I had a tranny put in a while back and the shop said they replaced the NSS and it didn't change anything and had no suggestions for me. I would really like to have back up lights, got any ideas? I pulled this part http://www.gmpartsgiant.com/parts/gm-actuator-a-trns-shft-lk-cont-26060737.html and it made no difference.