This article will walk you through reading off your stock file with MM3 hardware.
- Turn your key to the Run position (key on, engine off)
- Touch the screen to turn the mm3 on
- Select ECM Tuning
- Select ECM
- Select Get Stock File
- Follow the on screen prompts
- Turn ignition off and remove the SD card
- Insert SD card into your windows computer
- Using Windows File Explorer open the SD card
- Double click the Custom folder
- Double click Stock folder
- Copy stock.mm3 to your desktop
- Attach stock.mm3 to an email to stockfile@duramaxtuner.com
- Please include your order#, first and last name, VIN, and a list of modifications including tire size
To avoid corruption, please do not rename any MM3 files
Click here for the next step.