Does anyone have a 1999 GMC Sierra 5.3L 4X4 stock tune file?
Non calif. emissions.

 

yep...

 

Hm, I've never been able to upload hpt files before...

 

I told dewey to get with the program

 

Hmm, can't open the file.

Was that saved using HPT v.2.23?

 

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.

 

Thank you by the way, much appreciated.

 

This one is from my 99 so it should be totally stock. Welcome.

 

Interesting VE table.