What 5th Wheel Rails and Brackets Do I Need for a 2024 GMC Sierra 3500?
Updated 05/24/2026 | Published 05/20/2026
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Question:
Which 5th wheel rails do I need for my 2024 GMC 3500 long bed dually
asked by: Bryan C
Expert Reply:
Hey Brian. To install a set of 5th wheel rails on your 2024 GMC Sierra 3500 long bed dually, I recommend the Curt Custom Fifth Wheel Installation Kit item # C16429-204. This kit comes with custom fit brackets that install in pre-existing holes in your Sierra's frame. The included hardware will attach the industry standard 5th wheel rails directly to the custom brackets.
The universal rails that come with the item # C16429-204 have a Carbide finish so they're going to be the best option to blend in with your Sierra's factory bed liner. I attached a picture below so you can see what they look like installed. I also linked an installation video so you can see how to get them set up.
To make towing with a 5th wheel easier, I recommend adding the Curt 5th Wheel/Gooseneck Custom Wiring Harness item # C53CR. This harness puts a 7-way connector in the bed of your truck and allows you to keep the one on your bumper. You won't have to get down underneath your bumper to connect your trailer. This is the same harness that comes standard with the Sierra's that have the factory puck system.
What kind of 5th wheel hitch and trailer do you have?
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Product Page this Question was Asked From
Curt Custom Fifth Wheel Installation Kit for Chevy/GMC Truck - Carbide Finish
- 5th Wheel Hitch Rails
- Custom
- Above the Bed
- CURT
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Snixer
5/24/2026
I installed the Curt Bed Rails on my 2023 GMC SIERRA 3500HD, SRW. Kit is complete and the install videos here on ETrailer are the best. I will tell you that the bolt and nut by the fuel tank are the worst parts of the job! Oh and make sure you own a torque wrench and drill bits. Other than that, have fun drilling holes in the bed of your truck, measure twice drill once! You’ll be good ??