tune change
I would like to have my 91 performance tune (level 3) changed to 87 performance.
I don't use level 2 too often since it was written for towing, and level 1 is transmission only. So I would like a performance tune with out the towing feature. Another question I have is, when plugging into into the software, can it be returned to stock tuning from the software while still keeping the custom tunes?
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