Questions regarding factory brake controller? - Chevy and GMC Duramax Diesel Forum
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post #1 of 21 (permalink) Old 07-12-2019, 05:50 PM Thread Starter
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Questions regarding factory brake controller?


I have a new 2018 Chevrolet 3500 DRW with custom hauler bed that I purchased to tow my Cyclone toy hauler RV for fulltime RVing. This is the first truck I’ve had with a factory installed brake controller. Before my first tow with this truck my trailer was in the shop and had new drum brakes installed on all six wheels. I have adjusted the brake controller to the Max setting and don’t seem to get much braking from the trailer even when using it to manually brake the trailer. Never had these problems with my Prodigy brake controller in my other truck. Any recommendations before I claim underneath the 5er would be helpful an much appreciated.

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post #2 of 21 (permalink) Old 07-12-2019, 06:27 PM
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My first step would be to get a 7-way tester at Walmart or other source, about $10.. This will tell you all the connections that work, and those that don't. It will come in many occasions in the future, Im sure, if not for you, for someone else that's having problems. With a new truck, I wouldn't think there would be any problems with your truck. The older trucks, like my 2008 model were not setup at the factory to work with electric over hydraulic trailer brakes, but newer trucks should work just fine.

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post #3 of 21 (permalink) Old 07-14-2019, 02:07 PM
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Curious if the drums where adjusted properly on the install.
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post #4 of 21 (permalink) Old 07-14-2019, 04:19 PM
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This^.....well, not the drums, but were the brake shoes adjusted up properly after install?

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post #5 of 21 (permalink) Old 07-14-2019, 04:36 PM
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Even if new brakes are adjusted, my experience is they will not perform great until the shoes wear a bit. The issue is New shoes have a larger radius than the drums when new, so it takes a while to get full contact of the shoe in the drum.

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post #6 of 21 (permalink) Old 07-26-2019, 11:23 PM
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Not impressed with my controller as well, brakes are adjusted, trailer has over 10k miles on it. Previous tow truck was a ram, so only change was the truck.
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post #7 of 21 (permalink) Old 07-27-2019, 04:24 AM
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My controller works just fine on my truck with the Raptor hooked up. No issues.
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post #8 of 21 (permalink) Old 07-27-2019, 07:15 AM
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Well, maybe next year I'll change out all the shoes. The brakes are currently working, you certainly know when they are not. Maybe I'm expecting too much.

Brent W
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post #9 of 21 (permalink) Old 07-28-2019, 06:37 AM
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You said braking is poor even when manually actuating the brakes. Was this during a pull test? If not, you may wanna try a pull test to see how it goes. Should be able to lock the trailer brakes up by manually actuating the brake controller then putting the truck in D and giving it pedal to get 1000-1200 rpm.
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post #10 of 21 (permalink) Old 07-28-2019, 07:20 AM
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Change over to hydraulic disc brakes if you want stopping power. Not a huge job to do but an unbelievable improvement. Trailer will then be able to stop truck!

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