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The ATS Diesel transmission controller is an upgrade module for 2011–2014 GM 6.6L Duramax 2WD trucks, providing a factory-style TCM replacement to move from A50 to T87 calibration. It addresses transmission control behavior within the specified vehicle and year range, offering a direct-fit electronic upgrade intended for those particular Duramax applications.
ATS Diesel 11-14 GM 6.6L Duramax 2WD TCM Upgrade A50 to T87
