Cummins Unlock Froze at 88% on my Bully Dog GT Tuner

    November 11th, 2020

    How to fix Cummins unlock frozen at 88% on my Bully Dog GT Tuner?



    This is most commonly caused by having the incorrect harness plugged in during part 1 of the Cummins Unlock. 

    Part 1 requires the "Stock" harness that is included with the GT to be used. 

    If you have the "Unlock Harness" plugged in during part 1, please unplug and restart the unlock using the "Stock" GT harness. (Pictured below)





    Was this article helpful?

    Can’t find what you’re looking for?

    Our Technical Support team is here for you.

    Contact Support