Just thought I'd make a video on the trailer brake controller in the dash and what may have been a combination of things that went bad on my 2015 GMC Sierra 2500 HD.

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Controller switch https://amzn.to/46dj1ER
Pry tool set https://amzn.to/3r2HVbn
OBD2 code reader https://amzn.to/3PA3edv

Link to my Brake Control Module video:    • 2015 GMC Sierra Service trailer brake...