2022 GMC Sierra 3500 Factory Brake Controller Does Not Work with Dexter EOH Actuator

Question

Question:

I see there is a long history with the Dexter EOH not being compatible with GMC factory brake controller. Im having the same issue with my 2022 GMC 3500. I contacted Dexter and installed the relay they said would fix it. It didnt.... Any advice you can provide would be greatly appreciated. Very frustrated. Thank you.

asked by: THOMAS J

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Expert Reply:

I have a few different options for you but the issue with using an electric over hydraulic actuator and factory trailer brake controller together are not particular to any one brand whether that be the actuator brand or brake controller brand, they just don't work well together in most cases. The Hydrastar Electric Over Hydraulic Actuator Adapter Module part # HBA-CAM is an adapter you can install in-line on the trailer to fix the issue or you could go with the Curt Echo Wireless Trailer Brake Controller part # C51180 which will bypass the factory signal with no splicing.

expert reply by: Conner L

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Answer 1

Some trailer brake controllers, including many factory-installed models, will not work with an electric-over-hydraulic type trailer brake actuator like the Hydrastar #HBA16. EOH actuators like this present a very different electrical load to the…

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Answer 2

Seeing as your 2021 GMC Sierra 2500 Denali recognizes the trailer but then shows the error message once you start driving leads me to believe the issue is with your trailer. I would start by checking the 7-way connector and adding Dielectric Grease…

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Answer 3

From what we know the newer GM trucks, like your 2022 GMC Sierra 3500, shouldn't need the Adapter Module #DX35FR to work with the Dexter BrakeRite system, but I would be lying if I said this kind of thing hasn't popped up in the past.…

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Answer 4

If you will be using the Hopkins Molded Trailer Wire Connector, #H20046, then the yellow wire will attach to the wire from your reverse lockout solenoid. The yellow wire is attached to the center pin on the connector and the center pin in the…

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Answer 5

There are a number of reasons why the brakes on your trailer may not be working. Lets start with the easiest things to check. First, check the vehicle and trailer connectors for corrosion. This can cause a short inside the connector and the brake…

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Answer 6

Since you have already tested the trailer brakes with a few different trucks by different manufacturers (2 of which have been used with an Electric Over Hydraulic (EOH) system), the problem should be with your trailer. The reason that they most…

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Answer 7

I spoke with my contact at Titan and he said the Titan BrakeRite EHB Adapter for Ford/Chevy Integral Brake Controllers, #T4845900, is designed to work with both Ford and Chevy/GMC OEM brake controllers and the Titan BrakeRite EHB actuating system,…

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Answer 8

The factory integrated brake controllers are notorious for not working as well with Electric Over Hydraulic systems. They claim they work, but more often than not, there is an adapter needed for proper function. You can either use an adapter like the…

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Answer 9

The newer factory brake controllers, like on your 2022 Chevy Silverado, are generally fine with an EOH actuator like the Dexter DX Series Electric Over Hydraulic Brake Actuator #K71-651. But there are times when there are issues which is why I…

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Answer 10

If you're speaking of the OEM brake controller, then the ITBC on the 2021 GMC Sierra is compatible with electric over hydraulic braking systems such as the Dexter brake actuator used on your Keystone Montana Legacy. If your truck has the OEM…

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Answer 11

As you can see on the attached photo, the wiring diagram for HydraStar Adapter #HBA-CAM shows there can be a 25-40 amp circuit breaker in-line with the black wiring which goes from the battery's positive terminal to the adapter. I would stick…

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Answer 12

The integrated brake controller of your 2020 GMC Sierra 3500HD is compatible with the Dexter DX Series Electric Over Hydraulic Brake Actuator for Disc Brakes #K71-651 like it sounds like you have have without the use of an adapter.

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