Quote Originally Posted by EagleMark View Post
I was looking through Platform options in the 2002 0411 12212156 OS and the calibration for the Vortec is the only one checked for Low Resolution Crank GMT610 IIRC which is the Van that came with Vortec engine and this PCM.
I see that under vehicle platform #6 has these checked off, but how did you know that #6 is teh GMT610 van? Are the vehciles [platforms #1 through #10 defined somewhere? or did you come to this conclusion by comparing many differnt 41 2156 o/s's?

thanks

peace
PAuly

PS . I started compiling info over at PPE, then a gentleman named Airdeano helped me figure out that the "8.1l PCM" could be used to control an L31 engine. We went through the pinouts together and it all fit. Once this was proven, Jeff took the ball and ran with it, and HE made the blackbox to 0411 PCM swap possible for the masses. Jeff did all the hard work.