HESHY

Greetings

I'm in the middle of doing my first ls swap, and decided to start with DIY wiring harness. Chose to go with gen IV.

I looked in local junk yards and found one lying around, without the engine nor the car so I took it, now following the guids online one of the connectors is different and i can't seem to find the pinout for it, it has 53 pins. It is the on on the right in the attached picture. From the behind the written part number is PBT-GF15.

Keep in mind I am not from the USA, the owner of the junk yard told me it was removed from 2007 chevrolet caprice, and the engine is 6.0 but he does not know the engine number because the car is long gone.

The connector on the right

Also i don't think this is corresponding to an e38, what ecu uses this connector?

cheep

That looks like the firewall connector, bulkhead.

theunderlord

Same thought here, that sure looks like part of the vehicle specific body harness.