This T87A unlock service will allow you to use a variety of tuning suites to modify your T87A equipped 2017+ L5P Duramax with Allison transmission.
This is a service performed on your original TCM and it's a 1-2 business day turnaround service.
The TCM you receive will be the one you sent in!
This makes it so you can just install your unlocked TCM and go. No relearns needed.
None of the TCM OS or Calibration data is modified in any way and after unlock, still allows updating via OEM tools.
Thank you for your interest, and we are working harder to support more platforms each and every day!