You will not have to change anything.
Just be sure to remove the chip before you take it in.....or you'll have to buy a new chip because it will be fried.
Why are you getting your PCM flashed? Curiosity.....
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Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes.
SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory!
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