How to get an SUL (Stock Upload) file to send to a Custom Tuner

    December 30th, 2021

    How to get an SUL file to send to a Custom Tuner


    Common Code GM/DCX SUL (Stock Upload) Process



    Step 1- Connect Device to the vehicle data port (OBD2)

    Step 2- Highlight and select Vehicle Info

    Step 3- Turn Key to On/Run position. DO NOT START THE VEHICLE!  

    Step 4-Vehicle Information will populate. (VIN, Strategy/Part Numbers, Etc.) 

    Step 5- Once Vehicle Info has been retrieved, exit to Main Menu and Select Program Vehicle option.

    Step 6- Verify Vehicle Info is correct and matched the vehicle you are flashing.If info does match, select continue.

    Step 7- On the Device Updates screen, select continue to ensure that the device gets the latest firmware that is available.

     Step 8- At this point in time, you will skip cloud tunes.

    Step 9- Once you have reached the Street Use Notice screen, you will highlight and select Upload Stock option.

    Step 10- Turn the key to the Run/On position. DO NOT START THE VEHICLE!

    Step 11- The device will now proceed to unlock the vehicle processor and begin saving vehicle stock file (SUL)

     Step 12- When prompted, turn the key off. The device will now do a power down on the vehicle processor.

     Step 13- The device will process and then save the SUL that it just retrieved from the vehicle.

      Step 14- Plug device into a computer and open Device Updater (download from https://www.bullydog.ctom/suppor)













    Step 15- Select Get Stock File from Device option.


    Step 16- Select location to save device files


    Step 17- Updater will now save the .BEF and .SUL files from the device


    It will prompt you when this process is complete


    Step 18- Open location you saved files and send them to your Custom Tuning Dealer.





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