bing tracking image
Customer Service My Orders

Demco 5th Wheel/Gooseneck Wiring Harness Installation - 2023 GMC Sierra 2500 Video

content loading

Products Featured in this Video


Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug - 10' Long


Demco Custom Fit Vehicle Wiring

63 reviews


Code: DM8555002

Price:  $104.75
  • Custom Fit Vehicle Wiring
  • Fifth Wheel and Gooseneck Wiring
  • 10 Feet Long
  • Custom Fit
  • 7 Round - Blade
  • Demco



Mount this 7-way, RV-style connector in your truck bed to simplify hookup of your 5th-wheel or gooseneck trailer. Harness plugs into existing wiring and retains use of factory 7-pole at the bumper. 90-Degree connector fits into tight spaces.


Do you have a question about part DM8555002?more information >     


How to Install the Demco 5th Wheel/Gooseneck Wiring Harness on a 2023 GMC Sierra 2500


Hey everybody, Ryan here at etrailer. Today on our 2023 GMC Sierra 2500, we're gonna be showing you how to install the Demco In Bed Wiring Harness. And we're gonna be installing that in conjunction with the Curt 7-Way Cover Plate. But before we get into that, let's just take a minute check this out and make sure it'll work for you. If you end up having a gooseneck or a 5th wheel trailer hitch… see more >     


Info for this part was:

Employee Andrew K
Video by:
Andrew K
Employee Kathleen M
Video by:
Kathleen M
Employee Jonathan Y
Video by:
Jonathan Y
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Zach D
Video Edited:
Zach D
Employee Cole B
Installed by:
Cole B
Employee Shane H
Test Fit:
Shane H
Employee Robert C
Test Fit:
Robert C
Employee Ryan G
Test Fit:
Ryan G
Employee Clayton O
Test Fit:
Clayton O
Employee Bradley B
Test Fit:
Bradley B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.