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Need help please. 2011 GMC Sierra Denali with integrated trailer brake. There is nothing related to trailer brake in the DIC. Is it possible that the truck didn’t have this installed as an option or is something wrong? I can’t find any information on this and all info that I do find only seems to imply that it is supposed to be there. Trailer brakes do work but only minimally. Unable to adjust gain levels. Why is this not in my DIC? Anyone know?
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