Something else to note is GM sometimes used different pins on the same PCM for the same end job in different applications. Example: There are several sensor ground and 5 volt reference pins PCMs commonly used in different applications (GM added extras into the PCM hardware - more than were needed for any one application). Not every application uses the same ground and 5v reference pins. These ground and 5 volt reference outputs generally do not change with different programming so they can be used in any application as you see fit.
But as a general rule - if you follow my wiring instructions to the letter, everything should work fine.
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[This message has been edited by Darth Fiero (edited 10-18-2013).]