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1999 GMC 5.3L 4X4 U.S. Stock HPT file?

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Old Feb 16, 2012 | 11:03 AM
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Default 1999 GMC 5.3L 4X4 U.S. Stock HPT file?

Does anyone have a 1999 GMC Sierra 5.3L 4X4 stock tune file?
Non calif. emissions.
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Old Feb 16, 2012 | 12:02 PM
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yep...
Attached Files
File Type: hpt
original 99 tune.hpt (465.0 KB, 102 views)
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Old Feb 16, 2012 | 12:32 PM
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Hm, I've never been able to upload hpt files before...
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Old Feb 16, 2012 | 01:01 PM
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I told dewey to get with the program
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Old Feb 16, 2012 | 04:53 PM
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Originally Posted by Atomic
yep...
Hmm, can't open the file.

Was that saved using HPT v.2.23?
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Old Feb 16, 2012 | 04:55 PM
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I can open it, but I'm using the beta. I'm guessing that Atomic is as well.

You can email HPT to request the beta. They will give you a link on your HPT homepage.
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Old Feb 16, 2012 | 05:04 PM
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Originally Posted by AKlowriderZ71
I can open it, but I'm using the beta. I'm guessing that Atomic is as well.

You can email HPT to request the beta. They will give you a link on your HPT homepage.
Ok. I have the beta version, but was leary of using it because it tends to convert any HPT file to the new format and is not backwards compatable with 2.22, plus I didn't want to be the one to find the bug that makes my PCM a paperweight.

I'll upgrade to the beta I spose. Doesn't sound like too many folks are having issues with it.

I searched the HPT tune repository and there was only one 99 GMC file.
What was odd about this file is that there were many parameters that didnt look quite right, plus the firing order on the engine was completely different than what is quoted in the service manual, as well as my current botched up tune.
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Old Feb 16, 2012 | 05:21 PM
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Originally Posted by Atomic
yep...

Thank you by the way, much appreciated.
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Old Feb 16, 2012 | 06:21 PM
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This one is from my 99 so it should be totally stock. Welcome.
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Old Feb 16, 2012 | 07:37 PM
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Interesting VE table.
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