Looking for help, so I have a 1999 pcm from a Silverado 1500 4x4 with a lm7. I am wanting to change the transmission to a 4l80e as well as convert it to a 4x2. Can anyone lead me in the direction to do so? I have looked extensively everywhere to find an xdf or even what to update the os to however cannot find anything. My os is 9365637, all responses and help is appreciated very much, thanks!