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I just bought a 2021 Yukon Denali XL. It didn't come with a built in trailer brake. I don't want to mount a clunky aftermarket brake controller under my dash. Can I order a factory controller switch and harness and simply plug it in? Or is there more required to make it work. Thanks in advance.
 

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No, I've read several online reports that the factory integrated brake controller is linked to the anti-lock brake system, the primary control unit, and other units, and the OEM switch cannot just be plugged in. After market "clunky" controller is the only option. I'm putting a Tekonsha Prodigy P3 in my '21 Tahoe.
 
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