GDP EZ Lynk Transmission Tune File T87A (2017-2019 6.6L L5P Duramax)GDP EZ Lynk Transmission Tune File T87A (20172019 6. 6L L5P Duramax) The GDP EZ Lynk Transmission Tune File T87A is built for 20172019 L5P Duramax owners who are already running engine tuning but still dealing with the limits of stock transmission mapping. The factory T87A calibration holds back shift timing, torque delivery, and throttle control. This file corrects that by giving your 6L100 the shift strategy it should have had from the start. This
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GDP EZ Lynk Transmission Tune File T87A (2017-2019 6.6L L5P Duramax)