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My uncle purchased a 2019 classic without a oem brake controller. I had an older P3 prodigy brake controller from another truck I bought the harness so it was plug n play in his truck and his truck does not have any issues while pulling/stoping the same trailers that I do.
I took my 2020 ram in last year for this issue right after I purchased it. Had a tech ride along while pulling 6k load they observed the issues took it in and said the issue was in the programing they couldn't change. The dealer stated they would send this issue to ram after I referenced this...
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