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Yup I'm figuring that out right now, I need to firm up the shifts also.

Things are still a little cloudy but that might be the piece of the puzzle that gets me back in the ballpark.

Thanks programmer, Tom

I have adjusted for gears and tires on many different LS1 and LQ4 trucks but this Duramax truck has me scraching my head. On the others I just changed the tire size and the program recalculated the...