How to Tell the Difference Between the Curt Double Lock & EZr Gooseneck Hitch

Question:

I recently purchased a 2017 GMC sierra classic 2500HD short-box with turnover ball style gooseneck hitch. I believe it is a Curt double lock hitch, but I dont seen any name on it to verify that is what I have. I am interested in purchasing the Curt C16210 rail adaptor for this truck. How can I be sure what hitch I have in my truck. It has 2 locking pins for the ball that are about 5/8inch diameter, and spaced about 2-5/16inch apart Center to Center of hole. The Safey chain hoops are located just ahead of the ball. Thank you for your help

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Expert Reply:

If you could send me a picture of the gooseneck hitch you have installed in your 2017 GMC Sierra 2500 then I would be able to make a more educated guess but based on your description you have the Curt Double Lock Gooseneck Hitch part # C607-604 and the correct adapter would indeed be part # C16210. However, if the gooseneck hitch was installed at the dealer then you would have had the Curt EZr Gooseneck Hitch part # C611-624 and the correct adapter would be part # C16220. I have attached a photo of both the Double Lock and EZr for you as well.

If you are also looking for a 5th wheel hitch to use with this adapter, I recommend using the Curt Q20 5th Wheel Trailer Hitch part # C16536. This hitch has a 20,000 lb towing capacity and sliding feature to create clearance for sharp turns. I have attached a review video of this hitch for you as well.

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Conner L

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Question:

Attached are a couple if pictures of the hitch and ball in my truck.

asked by: Mark

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Expert Reply:

Thanks for the photos! You have the Curt Double Lock Gooseneck Hitch part # C607-604 therefore, the Curt X5 5th Wheel Base Rails Adapter part # C16210 would be the correct adapter for you.

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expert reply by: Conner L
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Conner L

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