P59 Pinouts
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G-Body
- Posts: 18
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85 Monte Carlo SS
05 CTS-V
P59 Pinouts
I haven`t ever seen a mostly complete pinout list for the P59 so I put one together while I was looking at trying to repurpose some of the inputs and outputs. It isn`t 100% complete, but there`s only a few that I wasn`t able to find used in at least 1 application.
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Last edited by G-Body on Sun Apr 05, 2026 5:13 am, edited 1 time in total.
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antus
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Re: P59 Pinouts
Nice! Just note that some pins are different between different vehicles so it's still best to check donor vehicle pinouts for the OSID on the P59 where thats available.
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
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G-Body
- Posts: 18
- Joined: Thu Jan 02, 2025 3:57 pm
- cars: 85 El Camino SS
85 Monte Carlo SS
05 CTS-V
Re: P59 Pinouts
So far when I have found that it was always a reference ground or 5v reference. I included what year/vehicle I found that pin used on in the list because of that. The vehicles are on each pin, but I should have mentioned that I based most of those pin functions on the 7603 OS in a 2004 silverado as that is the most common OS.