ECM calibration messed up Odometer

[Rawze]

I have not heard of one doing this before when using a proper calibration for updating the engine software.

Did you back up and restore the features and parameters properly with a work order before the flash?.

Also, sometimes on these newer trucks, the odo in the dash is quite picky and will refuse to go back to a lower number due to pirates that try to rewind the odo illegally.