2019 2500HD service trailer break system.

[Jett]

My 2019 HC 2500HD 12k miles is randomly telling me to Service Trailer Brake System with no trailer. I took it to the dealer with no avail. I'v done some research and this has been a know problem from ish 2008 to 2015. My Chevy dealer said they don't know but YouTube vids show a relay modual/fuse failure and where both are located. If mine is there I can't see it. I sent my Chevy rep a YT video and said I know there may have been some changes but where is it or what now has this control. I got to drag 6 1/2 tons a good distance December 1 2019.... I won't put an after market controller on it. Itl be factory. Just looking for the fix.

[Jurg77]

We run into this problem at work sometimes. The 7 way plug gets dirt built up inside the plug. First I will clean the plug with a 7 way cleaner tool and electronic cleaner. If the problem comes back I will change out the 7 way. These two fixes normally fix the issue.