This is not for my IROC, but for my 2003 Tahoe, and hoping someone here can help me out. I have recently taken the tranny out and got it rebuilt, put it all back together and the car will not attempt to crank the engine. The digital PRND32 Display does not show which gear the tranny is in, It usually shows with an underline under which gear its in. I tried starting the car in every gear and no luck. I got a new neutral safety switch today and replaced it, still the same problem. Tried adjusting the neutral safety switch and still no luck, I tried every position. I accidently gave direct voltage to the starter and it cranked over. I am out of ideas. Thanks.