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Adding An Aftermarket Brake Controller To Replace The Factory Controller On A 2020 GMC 3500  

Question:

how do you bypass the factory brake controller for and after market one on a gmc 3500

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Expert Reply:

When you add an aftermarket brake controller like the Tekonsha Prodigy P3 # 90195 to your 2020 GMC Sierra 3500, you will need to have the computer flashed by a GMC dealer to disable the factory brake controller. If you do not do this the computer will throw a trouble code and likely neither controller will work properly.

A Tekonsha Plug-In Wiring Adapter # 3064-P will allow you to plug directly into the connection on your Sierra.

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Bud M

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