5th Wheel Hitch Rail Adapter Kit for 2020 GMC Sierra 3500 HD with OEM Puck System

Question:

I have a 2020 GMC HD 3500 with a shock bed with the puck system with your current rail adapter fit

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Expert Reply:

The Demco rail adapter kit that you need for your 2020 GMC Sierra 3500 HD is part # DM6333 which is different than the part # DM6194 which was referenced for the 2019 model year. The adapter # DM6333 has a 21K weight capacity and it is compatible with your puck system whether you have the long or short bed.

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Jon G

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Follow up Questions

Kelly A.

I bought a curt fifth wheel plate for my 2019 Chevrolet with the factor pucks in the bed. worked great but since then I purchased a 2020 GMC 3500 and the puck position is closer together and cant be used so no camping yet this year. Can I get new bolt on sides to fit my 2020. 77695

Reply from Chris R.

I wish there was a way to adapt your existing Curt Adapter Rails to fit the new puck configuration on your Sierra, but your only solution will be with a new plate or even to convert the hitch itself. Can you tell me what model 5th wheel hitch you're using? 63246

Vern D.

looking for 5th wheel oem hitch adapter for 2020 gmc 2500 short box. And willit fit my reese slider hitch? 72502

Reply from Chris R.

The Demco Rail Adapter # DM6333 will work perfectly on your 2020 Sierra 2500 Short Box. It will provide you with industry standard rails to which your existing Reese hitch will mount without issue. 59404

Robert J.

I have a 2018 GMC 2500HD with a standard bed, and 5th wheel prep package. Im buying a 2020 GMC 3500HD with a standard bed and 5th wheel prep package. I have a Kurt A20 5th wheel with sliding rail will they interchange. Thanks 70338

Reply from Jacob H.

You will need to swap out the plate that your Curt A20 currently sits in for the Demco 5th Wheel Rail Adapter # DM6333 . This is currently the only solution for the 2020 GMC/Chevy factory puck systems since they changed the puck orientation of the pucks from 2019 to 2020. 57404

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