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1-8 of 8 Results
  1. Towing & Hauling
    I’ve had the truck for four years. The first three, the trailer brakes worked perfectly. I’ve had “service trailer brake system” on the DIC for months now. After research, I’ve seen most have found success with replacing a fuse or replacing the relay. Ive replaced the fuses, I’ve replaced the...
  2. EFI Live
    After replacing everything suggested to me causing the “Service Trailer Brake System”, I took my truck to the Dealership. It turned out, It was a bad speed sensor on the passenger side. I had that replaced along with a couple other minor things — speed sensor fixed the trailer brake issue, but...
  3. 2001 - 2007 (GMT800) Non Powertrain
    Looking for a schematic of the original wiring for an 05 durmax trailer package. Bought this truck used and there is 3, 7 pin trailer plugs under the truck. They all seem to be connected together, when i follow the wires towards the front of the truck i see two bundles above the fuel tank, then...
  4. 11-16 LML Duramax Powertrain
    Hey guys, A few weeks ago I was towing way over the recommended weight due to being lied to about the weight of the freight. Once I went across scales and seen how heavy I was I returned the the shipper. When I pulled in to drop the load off I rolled my window down and saw lug nuts and studs...
  5. 11-16 LML Duramax Powertrain
    Was driving in the snow today in 2 wheel drive and after a little slippage and the traction control cut on a few times the cluster lot up with lights and warnings. Service stabilitrak, traction control, trailer brakes, and the abs and brake warning lights were lit up as well. Anyone ever seen...
  6. 911 Problems Forum
    Driving from California back to Georgia outside of Arizona the stabilitrak message came up with ABS light and service trailer brake. I'm pulling a 2500 pound trailer with a 2018 3500 HD. Stuck over night and next day, no notifications once I started going. 500 miles down the road, emissions...
  7. Towing & Hauling
    My 2016 Sierra HD2500 with factory ITBC connected to electric over hydraulic travel trailer disc brakes has recently started to not work properly. When testing the situation while parked and pulling the break away they always seem to work properly. While in motion using the manual lever on the...
  8. 11-16 LML Duramax Powertrain
    In my 2013 3500HD,new to me last fall, while pulling my new 2020 5th wheel weighing about 12 K with Electric Brakes, when the brakes are applied hard the IBC controller maxes out to a gain of 10 but it doesn't seem to have allot of stopping power coming from the trailer ( some but not allot)...
1-8 of 8 Results
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