A couple of us on a Ram forum figured out how to retrofit the Trailer TPMS option onto 2019-2020 trucks not ordered with it (option was not available until 2-5-20). Ram is still not offering it as a dealer installed option.
There's a few more parts. TPMS receiver and a jumper cable to plug this in. Security bypass cable and AlphaOBD to recode the BCM to enable the option.
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