I did on the same happened but the TCM was no longer good once the download failed. It downloaded to the VI but when transferring to the tcm from the vi got to 99% froze and that was it had to replace the TCM as the consult would not detect a tcm to reprogram. If there is a way to so let me know. However I did inquire about it because a week later lost an ECM because of the freeze up. However with that said I have reprogrammed several in between. Apparently you have to turn of wireless and bluetooth, and make sure that the batt volts stay above 12 volts at all times. I know of some are disconnecting the rad fans to keep the voltage stable.
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