Cummins Unlock Froze at 88% on my GT Tuner

Modified on Mon, 12 Sep, 2022 at 5:33 PM

2013-2017 Cummins no longer requires the Unlock cable when using the BDX, or GT products.

We have released a new firmware update that makes the use of an external unlock cable not required. If you are on an old version, you can update your device, or follow the instructions below.

Freezing at 88% 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)