JUST brought a 2024 Silverado 3500 dually, I have a HD trailer GVW of 26K. Electric over Hydraulic brakes. The truck dose not recognize the trailer for brakes. I have 3 other trucks that it works fine with. 15 Silverado 3500, 21 gmc Denali 2500 HD , then hooked up to a 22 DODGE RAM 3500. ALL TRUCKS the trailer worked fine. GM says there is no Problem. go figure. Well their fix is to install a Aftermarket adapter non GM approved on my trailer to get them to work. As everyone knows trailer wiring will not last and needs attended to