Quote Originally Posted by tayto View Post
Thanks Fast, I now recall you talking about this in the MAF $0D thread from many years ago. I have had a few 7427's that came from GM with 4L80E calibrations in them, so have not run into that problem yet. I seem to remember you or dimented24x7 saying the '6395 was the "better" pcm?
Not sure I have ever said the 6395 was better. By large they are the same and $OD and $31 are more refined codes than $E6 or $OE and typically the codes run interchangeably in either PCM minus the 4L80E ISS provision missing in some. I have always seen the circuits in question in a 7427. It was the 6395 that I found missing them and from memory they were both from 93-94 CPI S10 Blazers or Astros.