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Custom Wiring Harness for Hayes Brake Controller in 2017 GMC Sierra 1500  


I am trying to find the wiring adaptor/quick connect for my Hayes Synchronizer controller that will fit my 2017 GMC Sierra 1500 Crew Cab 4x4 Z71. I have looked on ebay and they give a different part number than Hayes website. I will trust your recommendation and order from you. Thanks


Expert Reply:

Your Hayes Syncronizer Trailer Brake Controller - 1 to 2 Axles - Time Delayed # HA81725 is confirmed to fit your 2017 GMC Sierra 1500 using the custom wiring harness # HA81798-HBC. This adapter plugs into the port that is built into the electric junction box underneath your vehicle's dash. The black box is located to the left of the steering column, just above the carpet. To plug in the adapter, first remove the cover on the box. The adapter plugs into the first slot on the left, in the top row.

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