Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
This ATS Diesel TCM upgrade converts select 2011–2014 GM 6.6L Duramax vehicles from A50 to T87 transmission control module calibration. The listed upgrade is an explicit transmission controller change for those model years and engine, intended to replace the factory TCM calibration with the specified ATS unit to meet supported vehicle requirements without implying additional modifications beyond the controller swap.
ATS Diesel 2011-2014 GM 6.6L Duramax TCM Upgrade A50 to T87
