2018+ Cummins GT Bypass Cable Instructions

Modified on Fri, 02 Sep 2022 at 12:38 PM

Note: These trucks can set a DTC code of P1400  which the device will show as "Aftermarket Calibration detected."  The Tuner can erase the code, but it will still be shown on a dealer tool.  This code cannot be permanently cleared and could void any vehicle warranties.