4T65HD Conversion
#11
Join Date: Apr 2010
Location: Mentor, Ohio
Posts: 12,236
The only reason I could see re-flashing the PCM is if something was no longer stock in the trans (such as changing gearing ratios). Otherwise, the PCM should not care about it if it's equal to factory.
I'd be suspescious of what they are doing with a rebuild it a PCM flash is *required*.
I'd be suspescious of what they are doing with a rebuild it a PCM flash is *required*.
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bumpin96monte
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09-13-2013 10:57 AM