How Does Trailer Brake Controller Install in 2018 GMC Acadia

Question:

I need the location of the factory brake controller harness on a 2018 gmc acadia that this will plug into

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Expert Reply:

Your 2018 GMC Acadia actually has blunt cut wires for you to splice in a brake controller like the Tekonsha Prodigy P3 # 90195. The last Acadia to use the Adapter # 3026-P that you referenced was the 2017 Limited which was the same as the 2016 model year. The 2017 New Body and newer have the blunt cut wires up under the dash.

I took a look at the online version of the owner's manual for your 2018 Acadia and on page 278 it says that the blunt cut wires can be found above the parking brake assembly and you will need to connect the following wires from the Acadia to the following functions on your brake controller:

Blue - Trailer Brakes
Red/Black or Red/Blue - 12V Power
White/Blue - Stoplight Signal (only gets hot when pedal is pressed)
Black - Ground

For a brake controller I would recommend the Prodigy P3 Brake Controller part # 90195. This is our best selling brake controller because of how well it works and how easy it is to setup. This is a proportional brake controller that senses the amount of braking the tow vehicle is applying and applies a proportionate amount to the trailer brakes. This will be the last brake controller you buy. It can easily be transferred to future vehicles as well.

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Jameson C

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