The poster is no longer on this site and the attachments are long gone. If you are just looking for the wiring diagrams, they are available in the GM Techline eSI(see the links in my signature).
Thanks, it all started as just a place to hold some links.astrowill, that is a treasure trove of info you've assembled there.
What year?I only just saw AstroWill's reply, thanks to your reply, and so haven't gotten anywhere yet. I'll try to get it done using the diagrams but not 100% sure I'll be able to, either.