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Potential Tuner
Ecm file
I have a 2002 2500HD LT 6.0l vortec 4l80e, and was wondering were I could get a stock file, I used a obd2 scanner to adjust the tire size and something doesn't feel right so I got a mpvi3 and was wondering if I could flash it
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There is not going to be one stock file that is going to be correct for every 2002 2500 HD that was built.
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Senior Tuner
You don't want to ever flash a different file to your ECM (unless you really know what you are doing). Read your existing file and make the changes to it by comparing to to the "new" file.