I had seen this on other forums but thought maybe this did not occur in the newer GMs - but I am not sure. The Integrated Brake Controller does not always work with the Hydraulic Disc brakes and you have to get a special adapter. My dealer brought this up today - we pick up trailer in 2 weeks and the part we would need is out of stock pretty much everywhere. There was a bulletin that had come out - I do not know if there is one for the '21/'22 models. This is for the 2020:
https://static.nhtsa.gov/odi/tsbs/20...73714-9999.pdf
The second page in RED text says the part that can be used, but my question is if anyone knows will I really need this? 2022 Pinnacle 32RLTS with the Disc Brake option. 2022 GMC Sierra 3500.
This is the fix:
https://static.oemdtc.com/TSB/MC-10176016-0001.pdf