Hi guys, I need a little help. This is my first post here, so bear with me. My '87 Bonneville had a toasted 440T4 trans. I swapped in a 4t65-e and I'm running the diesel TCM standalone for that. All of the old transmissions diagnostics go through the current 1227783 PCM and I want to prevent any check engine lights from cropping up, this will be my wife's car and I don't want her worried. So, I want to tell the PCM that it is now in a manual shifted car, I want to enable highway mode and I want to turn off some of the diagnostics.

I could normally do all of that. But I found out that there is very little support for this PCM... like nothing, I have been searching for hours. So I guess I'm looking for an XDF file for a $44 mask AKBA code PROM. or help in making my own XDF file.