MM3 Tuner SD Card?

[Keron2233]

I tuned my truck 4yrs ago and recently started having SD card issues.

I reformatted my SD card and added the ECM file, plus software updates.

Do I need to retune my truck once I put my SD card back into my MM3 tuner?


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[AK Bob]

If you update the SD card's firmware, you will be prompted to retune.

If you only copy the duplicate original files from the old card to the new card and don't update the firmware on the card, then you do not need to retune.

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