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Alton Johnson

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  1. Alton Johnson
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  2. Alton Johnson
    I have a 2023 GMC Sierra AT4. I go through the checklist and do the trailer light test and everything is working but I get a warning. Chect Trailer Wiring. and it will not clear. I have checked the brakes on my trailer and the wiring and everything else is good. Could it be the 7 pin connector going bad or not getting a good connection? Everything works but the warning is driving me nuts.
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