2019 3500 brake controller issues

[chief4300]

when towing my 2020 attutude 5th wheel, the integral brake controller shuts off after about 100 miles and I get an ABS fail and trailer brake fail warning.  trailer brakes stop working as does the ABS and cruise control.    took to chevy and they say they cant find a problem.  took trailer back to mfg and they cant find problem either. checked trailer multiple time and can no faults.  any ideas?

[Jaydel29]

having the same issue with my 2020 Silverado 1500 (just turned 3000 miles, problem has happened several times).  When i hookup, everything is working fine (lights/brakes)... then a few minutes down the road, i start getting warnings about trailer connection and then the braking system deactivates.  Trailer has been tested at the shop, and connected to two other two vehicles with no issues.  its at the dealership right now, waiting to see if they can find anything.  

[DuramaxJ]

I am also having the same issue with my 2020 3500 DRW.  Works fine for a bit then service trailer brakes comes up.  Figured it had to be my trailer, but now starting to wonder.  The trailer is in right now for its 3rd time trying to figure it out.  So far all 3 times they can't find a problem with the trailer and they just ran a new wire to the hydraulic pump on the trailer to eliminate faulty wiring.  this time changing the trailer breakaway system.  Had the truck in the GM and all they said was it was a fuse and the fuses are all good.  If it's the truck in the end, I will be going after GM for the costs to my trailer since GM insisted it was the trailer and that nothing was wrong with the truck.

[2ndweldrig]

On 1/25/2020 at 9:14 AM, chief4300 said:

when towing my 2020 attutude 5th wheel, the integral brake controller shuts off after about 100 miles and I get an ABS fail and trailer brake fail warning.  trailer brakes stop working as does the ABS and cruise control.    took to chevy and they say they cant find a problem.  took trailer back to mfg and they cant find problem either. checked trailer multiple time and can no faults.  any ideas?

I have a 2019 3500 and I wasn’t towing anything. I stop to fill up and then the abs, stabile track,and service trailer break system came on. I had just had a recall done on the back fuel tank and it started leaking fuel. Not sure if it related. Has anyone figured anything out about the trailer system, ABS,

[GMCustomerService]

On 8/24/2024 at 6:54 PM, 2ndweldrig said:

I have a 2019 3500 and I wasn’t towing anything. I stop to fill up and then the abs, stabile track,and service trailer break system came on. I had just had a recall done on the back fuel tank and it started leaking fuel. Not sure if it related. Has anyone figured anything out about the trailer system, ABS,

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