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My truck is displaying a message to "Service Trailer Brake System" on 2012 Chevrolet Silverado 2500 HD

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
And the trailer brakes do not work. Can you tell me what will fix this problem?
(2) Answers
(1) Comments
my 2007 done the same thing took a wire brush to the trailer hookup and sprayed pb blaster on it all works fine now
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