November 29, 2022 at 10:21 pm #736260
Is anyone else having an issue with the integrated brake controller on the 2022 Silverado Refresh stating trailer brakes disabled service required? If so, have you determined what the issue is? I hear it is a known issue but no known cause or solution. I was able to obtain the following information through OnStar:
ABS – Braking and Stability System C159C An issue has been detected in the Antilock Brake System.
Needless to say, this was very discouraging the first time pulling the camping trailer and having to rely solely on the truck breaks.
December 8, 2022 at 5:11 am #737462
I am having the same issue. I called the Chevrolet Customer Assistance line and they were no help at all. The only information available is and I quote “GM Engineering is aware of the issued working on a fix. When more information is available this PI will be updated”. I am very disappointed in GM for selling a vehicle with a known issue and not disclosing it. Especially something as important as trailer brakes. Definitely a safety issue!
December 18, 2022 at 6:03 pm #738910
22 refreshed Trail Boss. My trailer brake controller did the same as the OP. Onstar diagnostics were vastly different. Network communications error with various modules. No help needless to say.
I scheduled an appointment with the service department of the dealer I bought it from. Diagnostics came back with a defective controller. Service department had it replaced within a few hours. No issues since 🙂
Schedule a service appointment.
December 22, 2022 at 4:11 pm #739714
*Insight to the trailer brake controller malfunction!* I made a video showing that I can cause the trailer brakes to error out using the squeeze switch only that results in the controller immediately resetting it and continuing to work ‘normal’ again after a moment until the next error. When I make it error out using the brake pedal, it triggers a full disable for that key cycle until i restart the truck. An interesting hot-fix/code change would be awesome to allow a pedal error to reset like the squeeze switch does. nerds, where you at?
June 8, 2023 at 3:58 pm #764815
I am having this same issue with my 22 Duramax Silverado 1500. the dealer I took it to did a quick diagnostic by plugging a tool into the trailer lioght/brake connector and pressed the brakes and the lights lit up, therefore nothing wrong with the truck. I found service bulletin N222384930 which I then relayed to the Chevy dealer service team. All my trailer lights work and I get very little voltage output on the brake output pin. I tried with a friend’s truck and all work fine. I do not get a trailer brake message, but continue to get the “Check Trailer Wiring” message when connected to the trailer and the trailer brakes will not engage. Any input if I am having the same issue as above or different? If anyone has had the service bulletin fix done, did it fix the issue? Thank you.
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