Why chavy is doing this IDK

I have had a complete electrical problem under the hood I have had like 7 things say low circuit, no circuit, low voltage, etc.

I need a new wiring harness part number 96867865. I have searched online for new used and aftermarket. with no prevail.

Which all the companies that make the harness are saying that the harnesses are discontinued I need one that has AC https://www.gmpartsonline.net/v-2010...wiring-harness, even though the 2004 Aveos wiring Harnesses are still being made by the GM OEM company https://www.gmpartsonline.net/v-2004...wiring-harness. AC Delco is also saying that the cars are to old which makes absolutely no sense seeing as how the 2004 are still being made. So I know someone screwed up on which vehicle it is supposed to be discontinued.

So I want to re-wire it myself. I was wondering if anyone had the pin connector names and part numbers, for the entire engine compartment eg. O2Sensor bank 1 sensor 1 sensor 2 or the MAF sensor connector etc... Or the actual pins names so I can search and buy them online. I can't find them.

Thanks for any help.

Links are for one of the websites I have searched.