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Which Curt A20 5th Wheel Trailer Hitch Fits a 2018 GMC Sierra 3500 with Factory Puck System

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GMC 3500 2018 puck system A20 hitch

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Expert Reply:

The Curt A20 fifth wheel trailer hitch that fits your 2018 GMC Sierra 3500 is either part # C16064, for a long bed, or the slider, part # C16669, if you have a short bed. The # C16669 is basically the sliding A20, part # C16541, combined with the adapter, part # C16023, to fit into your truck's factory puck system. The fixed # C16064 fits right into the pucks with no adapter.

The sliding hitch will provide more turning clearance by traveling up to 12 inches.

Also, if you would like to add a wiring connector in the bed of your truck to make it easier to hook up to the trailer you can use # C56000.

I've linked some install details and videos for you as well.

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Charles S

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