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A new ECM will come completely blank. You need to have the dealer flash your current tune onto it or you can send it to someone like Westers Garage for an aftermarket tune and he'll take care of all of it (that's what I did).
Good luck getting your dealer to flash your stock tune onto the new ECM though. Maybe it's cuz im younger and im only 22 yrs old but when I went and tried to do it they basically told me hell no. They questioned my ass so much about it. I told them I just wanted a spare ecm just incase something happened with the stock one and he was just like nah I can lose my job over this and bla bla BS bla BS bla bla bla.
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2008 Deep GXP Manual.
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