What 5th Wheel Rails and Brackets Do I Need for a 2024 GMC Sierra 3500?  

Question:

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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expert reply by: Jerred H

0

Carbide Finish
(click to enlarge)

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 ??

Jerred H.

5/24/2026

@Snixer Thanks for the tip Snixer! I appreciate you taking the time to share that feedback!

Bryan

5/24/2026

@Snixer My Truck came with preset holes & brackets in the bed. Will that make a difference?

Jerred H.

5/24/2026

@Bryan YES!!! That sounds like the GM factory puck system Bryan. It's the tow prep package you can attach a hitch directly to. Do you have 4 circles in a rectangular pattern spread out about 22" left to right? There would be a hole in the center for a gooseneck ball?

Bryan

5/24/2026

@JerredH. yes I do.

Jerred H.

5/24/2026

@Bryan That's great! That's a really nice optional feature. You don't need the item # C16429-204 5th wheel rails that's for sure. Do you already have a 5th wheel hitch? If so what specific one? There's different legs and adapters you can use to attach it to the pucks in your bed.

Bryan C.

5/24/2026

@JerredH. I do not . I’m gone for the weekend. I will check when I get home

Bryan C.

5/26/2026

@JerredH.so after further investigation with th 2024 Sierra I need a new fifth wheel hitch. What do you have & recommend?

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