Need PCM for 2004 GTO

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Feb 6, 2023 | 10:53 AM

Raymondrobins

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Need PCM for 2004 GTO

Can anyone recommend where I can purchase a replacement PCM for a 2004 GTO? Bonus if it can be tuned with a start up tune.

Feb 6, 2023 | 11:50 AM

LS1Formulation

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From: Grand Rapids, Michigan

I have an E40 ECM out of a 2006 Saab 9-7X, I pulled it when I scrapped it. Service number on the ECM is: 12596679 Unsure if this will work for you, but the engine I have IS a 24X reluctor. Let me know if you're interested.

Last edited by LS1Formulation; Feb 6, 2023 at 04:30 PM.

Feb 6, 2023 | 01:33 PM

Raymondrobins

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I am not actually sure about the part number. Some basic google searches list the PCM as a 12586243 part number.
Has anyone used fs1inc.com?

Feb 6, 2023 | 04:34 PM

LS1Formulation

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My part number says it will work for an '06 GTO, so I doubt it will work for yours. I've no experience with that company, myself. Maybe someone else will chime in.

Feb 6, 2023 | 04:51 PM

LS1 TJ

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I would contact one of the many ECM/Harness suppliers. They typically have ECM/harness in stock and can set up the ECM with a base tune.

Feb 6, 2023 | 05:21 PM

Raymondrobins

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Do you have one you would recommend? Flagship one has terrible reviews with the BBB.

Feb 6, 2023 | 05:25 PM

minytrker

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From: Brenham

We can get you one and do a base tune.

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Feb 11, 2023 | 02:45 AM

gametech

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From: Stockbridge GA

The 2004 GTO uses the p59 PCM. Those came in tons of other vehicles, so finding one should not be difficult. As a side note, it is one of the most flexible ls1 computers you can use. It has flex fuel and lean cruise capability, and can be segment swapped for a 4l80 transmission if need be.