Short answer is no you can't buy Tunercat OBD2. The TC OBD2 version they sold to Jet is the pre-CAN Bus tuner. Tunercat version for CAN Bus vehicles which your's are was only available to purchase if you were an original TC customer before they sold it to Jet. The definition files and seed keys can only be purchased by TC original customers AFAIK. Jet has their own way of licensing. There was a TC version you could buy from Moates if you purchased one of his Roadrunner PCMs but Moates has closed up shop. John at TC supported those units too and would probably sell def files for those customers. I'm not sure if you could even buy the CAN bus version from Moates. And even if you had a TC CAN bus version you couldn't use it on a 2019. TC support stops at MY 2018 on the trucks.The seed keys are for the 2017 and 2018 trucks. Even with HPT, that ECM (2019) would have to be sent to them for their unlocking service. Probably why TC doesn't support them or anything newer. 2019+ vehicles are very expensive to tune.
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