Gmpp ecm

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10-02-2012 | 06:52 PM

trevmust

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Gmpp ecm

I heard somewhere that the GMPP module is locked/unprogrammable? I hope not...

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10-03-2012 | 08:43 AM

Chevy406

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I have tuned 2 GMPP ECMs from crate 376 480hp engines. Neither of these ECMs were locked. Neither of these engines ran very well until MAF table was adjusted.

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10-03-2012 | 04:30 PM

trevmust

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thank goodness

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10-03-2012 | 04:48 PM

minytrker

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From: Brenham

I have tuned them with EFI Live, no problems. They didnt run that good on the gm tune.

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10-04-2012 | 05:22 PM

oldmano2z

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just spoke with local gm dealer on this very thing and it said on his parts computer that it needs a tune.

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10-04-2012 | 07:55 PM

minytrker

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From: Brenham

The ones I have tuned all had some of tune in them. Definitely not stock tunes in the ones I have seen.

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10-05-2012 | 02:21 AM

trevmust

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I want to turbocharge it. As long as I dont mash the pedal that will improve gas mileage right?

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Gmpp ecm

Gmpp ecm

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