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2018 GMC Duramax trailer lights not working

kbigs
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kbigs New Member

kbigs

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I can't seem to get the trailer lights to work when I hook up my utility trailer to the truck. The trailer is new as of this past April. It works when hooked up to a different car though. I have gone through and changed out the trailer fuses in the truck, replaced the trailer plug receptacle, and check the wires going into the receptacle. Any thoughts or does anybody know where the ground wire from the truck runs to? Thanks

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