First off,
Thanks Dave for your help thus far and I'm hoping to find a way out of the hole I have dug.
Grand Prix 2001 GT 3800 was experiencing what I thought were transmission issues so I bought a new to me 4T65E transmission from a 2005 Grand Prix. After flushing, filter change, and install I still had the same issues, and then found out that it was just a plugged cat. fml
So now I have a 2001 GT with a 2005 transmission and the PCM is throwing the P1810 error code, because it doesn't like the electrical stuff going on inside the transmission. Dave thinks that as a work around I can use a PCM from a 2003 Grand Prix, but would have to reprogram the final gear ratio to a 3.05.
Here's my questions:
1.) Which PCM 12209624 or 12583827?
2.) Will this actually work? (not that I don't believe Dave, he comes highly recommeneded)
3.) Should I just put the old trans back in since there's nothing wrong with it?
