2012 Chevrolet Silverado 2500 HD Q&A

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

And the trailer brakes do not work. Can you tell me what will fix this problem? -
Answer 1
should be under warranty at the dealer -
Answer 2
my 2007 done the same thing took a wire brush to the trailer hookup and sprayed pb blaster on it all works fine now -