Glad I found this post. I have a 2022 sierra 1500 limited AT4 that is 3 months old, one the way home after a 1300 mile trip towing our new 2022 winnebago Minie we were 30 miles from home going 65 mph and the the left front trailer wheel brake just locked up, the right rear did not lock but by the time I could pull over that brake was smoking. Now I have the exact same message and diagram on center screen as Rick had. Disconnected & reconnected and the brakes unlocked, we got home, but trailer lights are now always on. Hooked trailer to a 2022 f350 and everything is fine. Dealer ship has ordered new trailer light control module. NOW THE BIG QUESION IS : Will GMC replace my $200 Goodyear endurance trailer tire that is flat spotted down to the cord. Obviously this is a known problem.
