What is Needed to Install Demco 6077 5th Wheel Hitch in 2020 GMC Sierra 2500
Updated 02/03/2026 | Published 07/09/2024
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Question:
I HAVE A HITCH DEMCO MODEL 6077 ,WHAT DO I NEED TO BUY FROM YOU TO HOOK THIS UP TO A 2020 GMC 2500 TRUCK ,I HAVE JUST THE HOOK UP,NO MOUNTING AT ALL,PLEASE HELP
asked by: Rob C
Expert Reply:
Hey Rob,
I can help you get what you need for your 2020 GMC Sierra 2500 to install the Demco # DM6077 hitch. I assume when you say "no mounting" that you don't have the side plates for the hitch, or the base rails for your truck. So with that in mind, here's what you'll need:
- Replacement Side Plates for Demco Autoslide 5th Wheel Trailer Hitches # DM6003
- Curt Custom Fifth Wheel Installation Kit for Chevy/GMC Truck # C16429-204
The side plates will attach to the # DM6077, and the installation kit that fits your Sierra will give you the brackets and base rails needed to mount the hitch. Curt are compatible with the Demco hitch, and I like them because they don't require drilling into your truck's frame to install.
The only other thing you'll need if you don't have it is a 5th wheel wiring harness, the Curt 5th Wheel/Gooseneck Custom Wiring Harness # C53CR.
Product Page this Question was Asked From
Replacement Head and Base Assembly for Demco Autoslide 5th Wheel Trailer Hitches - 18K
- Accessories and Parts
- 5th Wheel Hitch
- Head
- Head Assembly
- Autoslide
- Demco
more information >
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Jesse M.
2/3/2026
Hey Rob, how did things go getting your Demco hitch mounted on your Sierra 2500 with the Curt base rails and side plates? Your update could make it easier for the next person working on the same setup.