I just purchased a new 2022 Silverado 1500 I’m having the same issue with trailer brakes when connected to any trailer I get trailer brakes disabled service required went back to dealership they confirmed the problem said gm is aware of the problem but at this time there is no fix I called gm and got the same answer, totally unacceptable and dangerous. I went on the NHTSA site and reported the problem I suggest everyone with this problem does the same.