Plugging fifth wheel into bumper plug?
So on this 2003 GMC 2500HD that I bought recently I was finally installing the fifth wheel hitch and the brake controller, then I cut the tie straps from the wire harness between cab and box to hook u...
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The factory 7-pin at the bumper will certainly work. Most folks mount the second 7-pin in the bed for aesthetic reasons, not wanting to drape the cable over the tailgate of the truck. I added the second 7-pin in both my current truck and my previous one.
