How to Convert a 21K Demco Autoslide Hitch to Work w/ a 2024 GMC Sierra 3500 w/ the Puck System
Question:
Good day I bought a 21k Demco sliding hitch and mounting plate from you in 2029 for my new GMC 3500 pickup with standard bed and GM fifth wheel and gooseneck prep. Will the base plate I have fit in a new 2024 GMC 3500 with the same bed and fifth wheel and gooseneck prep? Thanks
asked by: William B
Expert Reply:
Welcome back! I took a look at you order history and the Demco 5th Wheel Rail Adapter item # DM6194 you bought back in 2019 does not fit the puck system in your new 2024 GMC Sierra 3500. GM changed the puck pattern starting in the 2020 model year.
We've got two options to make the 21k Demco Autoslide item # DM8550035 you purchased fit in your new truck. The easiest way and the one I recommend is to change the side plates using the Replacement Side Plates for Demco Autoslide 5th Wheel Trailer Hitch item # DM49GV. These simply bolt onto the side of your Autoslider and have legs that mount directly to the puck system with no need for an adapter.
The second option is to use the Demco 5th Wheel Rail Adapter item # DM6333 and have the same set up you've been using for the last few years.
Products Referenced in This Question
Replacement Side Plates for Demco Autoslide 5th Wheel Trailer Hitch - Chevrolet/GMC
- Accessories and Parts
- Fifth Wheel Hitch
- Plates
- Side Plates
- Autoslide
- Demco
more information >
Demco 5th Wheel Rail Adapter for Chevy/GMC OEM 5th Wheel Towing Prep Package - 6-1/2' Bed - 21K
- Accessories and Parts
- Fifth Wheel Installation Kit
- Adapters
- Rail Adapter
- Demco
more information >
Demco 5th Wheel Rail Adapter for Chevy/GMC OEM 5th Wheel Towing Prep Package - 21K
- Accessories and Parts
- Fifth Wheel Installation Kit
- Adapters
- Rail Adapter
- Demco
more information >
Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 21,000 lbs
- Fifth Wheel Hitch
- Sliding Fifth Wheel
- Aftermarket Below Bed Rails
- 5250 lbs Vertical Load
- 21000 lbs GTW
- Double Pivot
- Premium - Single-Hook Jaw
- 15-1/4 - 18 Inch Tall
- 14 Inch Fore/Aft Travel
- Demco
more information >
Product Page this Question was Asked From
Demco 5th Wheel Rail Adapter for Chevy/GMC OEM 5th Wheel Towing Prep Package - 21K
- Accessories and Parts
- Fifth Wheel Installation Kit
- Adapters
- Rail Adapter
- Demco
more information >
Featured Help Information
Instructions
Continue Researching
- Shop: Replacement Side Plates for Demco Autoslide 5th Wheel Trailer Hitch - Chevrolet/GMC
- Shop: Demco 5th Wheel Rail Adapter for Chevy/GMC OEM 5th Wheel Towing Prep Package - 21K
- Q&A: Replacement Hub Needed for Lippert 122093 Hub on 5,200 lbs Axle
- Q&A: How Can I Remove RV Roof Coating From The Side Of My RV?
- Q&A: Does Primer Need to Be Applied to Aluminum Roof Before Applying Alpha Systems 4034 Roof Coating
- Article: Trailer Maintenance Schedule
- Q&A: Recommended 5th Wheel Rail Adapter for the GM Puck System
- Q&A: How to Determine Correct Rise or Drop for Blue Ox SwayPro Weight Distribution System
- Q&A: Height of Demco 5th Wheel Rail Adapter for Chevy/GMC OEM 5th Wheel Towing Prep Package
- Q&A: How Much Height Will Curt 16027 Puck Adapter Rails Add to 5th Wheel Hitch Height
- Article: 4 Steps to Choosing Your 5th Wheel Pin Box
- Article: Gooseneck to 5th Wheel Adapters
- Article: 2011 Chevrolet / GMC Elite Series Fifth Wheel Trailer Hitch and Under-Bed Gooseneck Installation Kit
- Article: What Exactly is Tongue Weight?
- Article: Choosing the Right Suspension Kit for Your Truck and Trailer
- Article: Fifth Wheel Trailer Hitch Information and Installation Tips