5th Wheel/Gooseneck Wiring for 2020 Chevrolet Silverado 3500
Updated 02/03/2026 | Published 07/23/2024
Products Featured in This Question
Question:
I have a 2020 chevy 3500 hD duramax. I have trailer wiring from factory in the back bumper. I want to keep that and add a 7 pin inside the bed. what part do I need ?
asked by: Michael S
Expert Reply:
Hi Michael; I recommend the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector # C53CR. This wiring harness comes with a cover plate adapter that will fit the factory connector opening in your truck bed for a nice, clean installation.
If you would like the option of having a 4-way in the bed as well the # C58FV will also work. The style of connector this wiring harness comes with also fits the factory opening. The connector matches the style you have on the back of your 2020 Silverado 3500 with the 7-way on one side and 4-way on the other.
Product Page this Question was Asked From
Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector and Cover Plate - 7' Long
- Custom Fit Vehicle Wiring
- 5th Wheel and Gooseneck Wiring
- Vehicle End Connector
- 7 Blade
- Plug and Lead
- Plug-In
- Hidden
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 4-Way and 7-Pole Connector - 7' Long
- Video: Curt 5th Wheel/Gooseneck Custom Wiring Harness Installation - 2020 Chevrolet Silverado 2500
- Shop: Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector and Cover Plate - 7' Long
- Shop: B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit - 30,000 lbs
- Video: Curt 5th Wheel/Gooseneck Wiring Harness DIY Installation - 2024 Chevrolet Silverado 2500
- Shop: B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit - 30,000 lbs
- Article: Trailer Wiring Diagrams
- Search Results: trailer hitch
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Trailer Hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer wiring
- Q&A: What Is An OEM Prep Package And How Do I Know If I Have It
- Shop: B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit - 30,000 lbs
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Article: How to Measure for Trailer Hitch Drop
- Video: B&W Companion OEM 5th Wheel Hitch Manufacturer Breakdown
- Shop: Suspension Enhancement
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: trailer tires and wheels
- Shop: Brake Controller
- Video: How to Choose a Trailer Brake Controller
- Search Results: gooseneck hitch
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: How to Choose the Right Trailer Hitch Class
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Search Results: trailer jack
on Custom Fit Vehicle Wiring
Robin H.
2/3/2026
Hey Michael, how did the wiring harness work out for adding that 7-pin in your truck bed? Your results could really help others looking to keep their factory bumper connector too.