I have a 2004 SS Silverado and i was wondering if anybody knew whether or not a NNBS shifter would work in it (the one with the + and - shift buttons)? Also was wondering if there was any way possible to make those buttons functional on my older truck

 

I don't think that it would work as they were used on the 6 speed transmissions and NBS duramax's with the Allison. There would need to be some sort of conversion box and tuning involved im sure. It would bolt in place, just the (+/-) wouldn't work