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Discussion Starter · #1 ·
I have went to holden crazy to look for a tune for the 4.8 i cant find one i can only find a tune for a super charge 5.3 does anyone no of any other sites rather then just www.holdencrazy.com thank u very much
 

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2005 GMC Sierra 2500HD LLY 4x4 RCSB
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What kind of tune are you looking for? More than likely you will have to modify it the your needs anyways so purchasing a wideband O2 is needed if you are serioous about what you are doing.
ls1tech.com and performancetrucks.net should answer many of the questions you might have.

//Lennart ... in the process of tuning a 2000 5.3L with a Whipple (without the piggy back electronics)
 

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duramaxin14;1631882; said:
Man im looking for the freckin hottest tune they got for a 4.8 gasser
You realize that was the same sentence right?

It's been posted before, add a couple degrees ignition advance, work on shift points and shift firmness...Not a whole lot to be had unfortunately...
 

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Messing with a gasser tune really only starts to make sense to adjust for mods you have done....like cam, heads etc.
 

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Are you using your own software? HP tuners has a Tune repository. If your looking for a tuner try Zippy ( he's on Performancetrucks.net , zippyperformance.com) or Try Nelsonperformance.com -2 of the best tuners out there for sure.
 

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Discussion Starter · #8 ·
He already has efi live someone was saying something about jesse and waitformeperfomace or some heard he has some nice tunes
 
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