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mrwhaley12

Service Trailer Brake System message

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My 2014 1500 LTZ crew cab started giving the "Service Trailer Brake System" message last summer while towing our camper during a heavy rain storm. Shortly after this message came in, I received a message saying the Braking System was Disabled. I figured it was our camper since it is 7 yrs old and didn't think much of it since it was our last camping trip of the yr and we were nearly home. In December I bought a new enclosed trailer and while towing the brand new trailer home the "Service Trailer Brake System" came on 3 times in 10 miles. I had the truck in for service and recall work in February before a long trip and had the dealer check it, the truck is still under it's Bumper To Bumper warranty with only 25000 miles. I was told there was no "Code" in my system so they wouldn't/didn't do anything more to fix it. A couple days later we headed out for our trip and the "Service Trailer Brake System" message chimed in 3 times in 2 minute with no trailer attached to the truck! I have put an additional 3000 miles (without towing) on the truck and the message has NOT returned since the beginning of our trip. The first time it happened conditions were very wet but both times since have been during dry weather. For me towing time is approaching and I need this fixed. Please offer any ideas I can forward to the Dealership. I have contact GM's Customer Service Team but have not heard anything in going on 2 weeks.

 

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I can sympathize with your dilemma. I have been fighting a Check Trailer wiring message for about 3 months.I completely rewired my Big Tex still got it off and on. Not alot but enough to make me nerve racked. I replaced the trailer connector with the preferred POLLACK brand thought it was finally put to rest. Nada got one message saturday pulling to camp. Arrg wth i SWEAR i WILL figure it. :banghead::crackup: Sorry I wasn't exactly helpful with your problem

Edited by crankman

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Have seen the same thing on my 07 HD. Sometimes with or without the TT. The message appears and disappears at random. The first time was also in a rain storm while not towing. I suspect that there is some kind of service loop that the computer runs that checks the status of various systems - if by chance the Brake Controller system does not respond, or responds with an error code it shows on the DIC. If the next loop shows no problem it goes away.

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Had same issue with my 2014, cleaned connections and used dielectric grease, still failed periodically. Dealer said there was a TSB pointing to brake fluid level, so they filled it to the brim. So far that seemed to fix the problem, but only pulled a few times since, then winter checked in.

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Had same issue with my 2014, cleaned connections and used dielectric grease, still failed periodically. Dealer said there was a TSB pointing to brake fluid level, so they filled it to the brim. So far that seemed to fix the problem, but only pulled a few times since, then winter checked in.

Cool thanks for that tip, I will check my brake fluid just to cover that. I have been chasing that code forever it seems. :thumbs:

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16-2500HD Z71 Silverado-DMAX- with & without trailer DIC repeatedly dictates trailer brake needs servicing. Dealer replaced 7pt receptacle as it showed signs of water corrosion & relay located under spare tire. 1/2 hour labor & all fixed & under warranty :  ) . 

 

This youtube link is not my video but it appears to cover my issue. 

 

Edited by PaddyO
added warranty info

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Had the same issue on my 2016 2500HD with the 6.0L. Dealer couldn't duplicate blah blah blah. It would happen randomly when connecting to a trailer. Dealer told me just bring it in the next time it happened but what a crock that is. Anyhow ended up replacing my Trailer Brake Control Module shown in the video above and problem is gone. 3 months no issues yet.

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Well, if I need to do this, I already have half the job done in that I never have my spare riding under the bed!  But great video.  Thanks for posting.

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On 2/20/2018 at 1:23 PM, downs807 said:

Had the same issue on my 2016 2500HD with the 6.0L. Dealer couldn't duplicate blah blah blah. It would happen randomly when connecting to a trailer. Dealer told me just bring it in the next time it happened but what a crock that is. Anyhow ended up replacing my Trailer Brake Control Module shown in the video above and problem is gone. 3 months no issues yet.

Having the same problems with the trailer brake warning system. I did replace my controller and I still have the same message Next Step checking the brake fluid other than that has anybody heard of a fix?

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I have a problem... my 13 3500 HD dually... the trailer breaks don't work at all, I bought it used, but never needed them until now, we got a new 17k lb. 5th wheel. Any help would be appreciated! 

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I have a problem... my 13 3500 HD dually... the trailer breaks don't work at all, I bought it used, but never needed them until now, we got a new 17k lb. 5th wheel. Any help would be appreciated! 

Could be the trailer brakes. Check wiring to the axles for breaks. I had a brand new trailer that the wires were routed in such a way when the suspension moved for the first time it cut the wire into.


Sent from my iPhone using Tapatalk

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1 hour ago, cperk said:


Could be the trailer brakes. Check wiring to the axles for breaks. I had a brand new trailer that the wires were routed in such a way when the suspension moved for the first time it cut the wire into.


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Sounds good... thanks for the input! 

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