Gmpp ecm

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10-02-2012, 05:52 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, 07:43 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, 03:30 PM

trevmust

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thank goodness

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10-03-2012, 03:48 PM

minytrker

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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, 04:22 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, 06:55 PM

minytrker

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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, 01:21 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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