I was wondering if anyone might have some input. On our truck an error messages flashes with an explanation point and a message asking if the trailer is connected along with beeping here and there. We have had two dealers look at it and they can find nothing wrong. My husband took his truck in to be checked and they also could find nothing wrong. We picked it up yesterday from the RV center and was ready to leave on vacation and it started again. We now have another appointment somewhere else tomorrow morning. Thanks for taking the time to read!

Knowing what make, model, and year of the truck in question would make answers a whole lot easier to come by. Also, knowing what trailer you have connected might help to.It's entirely possible there is nothing wrong with your truck and the problem is in the trailer wiring.

I didn't think of that. The truck is a 2015 Silverado 2500 and the trailer is 13 years old and a 27' Wilderness. The wiring in the trailer has been completely check out and the power cord that plugs into the truck has been replaced. Everything has been checked in the trailer and the rv dealer is thinking that maybe there is a bad sensor in the truck although the truck dealer said it all checked out ok. Really frustrating!

My truck has a light for problems with the trailer brake wiring.

Bad plug on either the truck or trailer

My guess would be bad trailer wiring that is loose or partially broken. Maybe a loose or corroded ground wire. My utility trailer is 13 yrs old and was doing that. I found a bad ground on one tail light and broken wires under the trailer. I replaced all the wiring and the problem went away.

error message on truck | Good Sam Community

tc1
Explorer
Sep 10, 2018
Thank you for your replies. This has gotten to be crazy. The RV center said everything mentioned is good and we are now waiting for GM to call. We took the truck in again somewhere else today and all is fine. Everything is supposedly great but the alarm is still going off. Thanks again for all the suggestions!
Dave5143
Explorer
Sep 10, 2018
So who do you believe? GM or the RV Center? I know which way I'd bet on.
wnjj
Explorer II
Sep 10, 2018
An intermittent problem with the trailer wiring is nearly impossible for the RV shop to find unless they've pulled the wires out and physically examined them and even then it's difficult.

If if were me, if just run new wire from the plug to the brakes. Odds are it's undersized anyway and you'll end up with better braking.
BarneyS
Explorer III
Sep 10, 2018
In my opinion the above post is spot on!
Barney
jdbuck21
Explorer
Sep 13, 2018
I had this issue with my 2016 chev 3500. The chev connectors in the bed of the truck do not make a good connection with my trailer plug. Used dielectric grease and sprayed it in the plug and problem went away.
mkirsch
Nomad II
Sep 13, 2018
My Dad's 2015 Silverado 2500 with IBC will occasionally give the "service trailer brakes" alert when NOTHING is connected! Dealer can't find any problems either.

Do some diagnostic testing. Try the trailer with a different truck. Try the truck with a different trailer. Which does the error message "follow?"

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