New Unlocked GM T87A TCM for 2017 and newer GM 8 and 10-Speed transmissions.
This release provides the first and only 10-Speed transmission tuning solution for 2017 GM Vehicles.
The T87A TCM for the GM 10-speed needs to be individually licensed for 4 GM credits for tuning.
ALL T87A TCMs need to be unlocked via the GM Unlock service before they can be tuned. 
Must Specify TCM service number and VIN for proper TCM