Jump to content


  • Posts

  • Joined

  • Last visited

Profile Information

  • Name
  • Location
    New York
  • Drives

Aaustins14's Achievements


Enthusiast (2/11)



  1. I will go through those.. Thank you. Nice website to keep bookmarked. One thing I do notice is that a lot of the TSB's are talking about this issue when a trailer is connected. I have no trailer connected. I did think about electrical/voltage issues. I can check the age of the battery after work tonight. I have not had any long cranks or old battery indicators, but worth a check.
  2. Update... So I got the new manual brake controller and installed it. Nothing changed, seems to be reacting the same. Randomly throwing "Service trailer brake system" and "Check trailer wiring." It doesn't seem to be linked to movement like a chaffed wire. It happed a handful of times before I even put it in drive. It also happened sitting at a stop light after I had been sitting there for a while. Checked again for bad/chaffed wires. Should I just bite the bullet and order the trailer brake controller?? I really hate the brake out the parts cannon. Any suggestions are much appreciated
  3. OK, So I unplugged the manual trailer brake controller in the cab. Now the only warning is the warning immediately after I start the truck. This warning was there before I unplugged it. Drove around today with no issues except the warning on startup. I am hoping that the controller is the issue. My other thought is that with it unplugged the entire trailer brake system is disabled and thats why the warnings stopped?? I am going to order a new one and see what codes remain after installing it.
  4. @M1ck3y I have checked over a lot of the visible wiring harness and found nothing. A lot of the harness is covered in wire loom so it is hard to tell, but I didn't see any chaffing. My understanding with that last code was that the Chassis couldn't talk to the Trailer brake module..? I guess it could be either of them or wires in between. Someone would have to really understand the system and how their networked to figure that out. That article only references the 2013/14 Silverado/Sierra HD trucks.. So wouldn't be applicable. Thanks for the ideas @OffTheAir Yea. Its driving me nuts. I did check all the fuses that seemed to be related to anything trailer or braking and they were all ok. I will look into the on dash controller.. Maybe ill try unplugging it and see if it improves. Thanks for all the ideas. They are appreciated.
  5. Ok everyone, new here. I tried my hardest to avoid posting because I know that there are a thousand threads on the internet regarding the chime for "Service Trailer Brake System" and "Check trailer wiring". I have intermittently had the Service trailer brake system and check trailer wiring warning come on the screen for maybe a year. It would pop up maybe once or twice a month. The problem is that this week it must have went off hundreds of times. It has never gone off while pulling a trailer, it only ever happens driving empty. Today on my drive home from work it chimed at me from key on to key off when I got home. It was very rainy so could be a wiring issue. It beeps back and forth between the two warnings the entire drive. The truck does have a brand new 7pin/4pin trailer connector I installed in the rear bumper, so I know it isn't that. I also unplugged the Trailer Brake Module above the spare tire and cleaned and added dielectric grease. I looked for corroded wires but did not see any. Is there a particular place to look? Any help is appreciated, I'm at my wits end. Thanks in advance EDIT : Forgot I scanned the chassis control module.. Came up with these codes: c1114-00 c1115-5a c1116-00 c1117-00 u1556-0 EDIT: 2014 GMC Sierra 1500
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.