Recommended 5th Wheel Rails for a 2016 GMC Sierra 2500 w/ a Curt R20 Slider
Updated 09/29/2025 | Published 09/05/2025
Products Featured in This Question
Question:
Hello, I am inquiring if the Curt A20 5th wheel hitch with the R20 slider is compatible with a 2016 GMC Denali 2500? Thank you very much for your help
asked by: Kenny
Expert Reply:
Hey Kenny. So long as your 2016 GMC Serra 2500 Denali has a set of 5th wheel rails the Curt A20 5th Wheel Trailer Hitch w/ R20 Slider C16541 is indeed compatible.
If you need a set of 5th wheel rails, I recommend the Curt Custom Fifth Wheel Installation Kit for Chevy/GMC item # C16411-204. This set of rails is industry standard which means it will work with most 5th wheel hitches on the market including your Curt A20. The brackets are custom fit and install in pre-existing holes in your Sierra's frame.
To make towing with a 5th wheel easier, I recommend adding the Curt 5th Wheel/Gooseneck Custom Wiring Harness item # C56000. This harness puts a 7-way connector in the bed of your Sierra and allows you to keep the one on your bumper. This makes hooking up to your 5th wheel trailer easier and more convenient.
What kind of 5th wheel trailer do you have?
(click to enlarge)
Product Page this Question was Asked From
Curt Custom Fifth Wheel Installation Kit for Chevy/GMC - Carbide Finish
- 5th Wheel Hitch Rails
- Custom
- Above the Bed
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Q&A: Does Demco Bracket Kit part # DM8552027 Fit 2014 Chevy Silverado 1500
- Q&A: Does Truck with 6-1/2 ft bed Have to Use Slider Hitch for Turning Clearance with Fifth Wheel Hitch
- Article: Gooseneck to 5th Wheel Adapters
- Q&A: Auto Sliding 5th Wheel Hitch For A 2025 Chevy 2500 Short Bed
- Article: 4 Steps to Choosing Your 5th Wheel Pin Box
- Q&A: Best 5th Wheel Rail Adapter to Use a Pullrite Hitch in a 2025 Chevy Silverado 2500 Puck System
- Q&A: Differences Between Above and Under Bed Fifth Wheel Hitch Mounts for 2020 Ford F350
- Q&A: 2015 GMC Sierra 2500 5th Wheel Bracket Kit Recommendation
- Q&A: What Is An OEM Prep Package And How Do I Know If I Have It
- Article: Ram Trailer Tow Prep Package
- Article: Fifth Wheel Trailer Hitch Information and Installation Tips
- Article: Sidewinder with Rotating Turret for Short Bed Pickups
- Article: RV Propane 101: How Does My RV's Propane System Work?
- Article: Adapters for Towing a 5th Wheel Trailer with a Gooseneck Hitch
Jerred H.
9/29/2025
Hey Kenny, did you get a chance to install the Curt A20 hitch with the R20 slider on your GMC Denali? I'm curious to know if the setup worked well for your 5th wheel trailer. Your experience could really help others looking to set up their towing system!