1. Custom Fit Vehicle Wiring
  2. Demco
  3. Custom Fit
  4. Fifth Wheel and Gooseneck Wiring
  5. 7 Blade
  6. 10 Feet Long
Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug - 10' Long

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

Item # DM8555002
lowest price pledge
Retail:$109.28
Our Price: $85.12
You Save: 22%
Custom Fit Vehicle Wiring

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Orders above $99 qualify for Free Shipping
Shipping Weight: 3 lbs
Quantity: 
In Stock
Demco Custom Fit Vehicle Wiring - DM8555002
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

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. Call 800-298-1624 to order Demco custom fit vehicle wiring part number DM8555002 or order online at etrailer.com. Free expert support on all Demco products. Guaranteed Lowest Price and Fastest Shipping for Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug - 10' Long. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (21)
  • Q & A (121)
  • Photos
  • Why etrailer?

Demco Custom Fit Vehicle Wiring - DM8555002

  • Custom Fit
  • Fifth Wheel and Gooseneck Wiring
  • 7 Blade
  • Demco
  • 10 Feet Long

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.


Features:

  • Provides 7-way, blade-style connector in your truck bed for hassle-free hookup of 5th-wheel or gooseneck trailer
    • Connector can be mounted in truck bed sidewall, tailgate post, or wheel well
    • 10' Long, insulated wiring harness easily reaches from rear bumper to truck bed
  • Plugs into factory wiring - no cutting or splicing
    • Requires that truck have factory tow package
    • Retains use of factory 7-pole connector at rear of truck
  • Offers enhanced weatherproofing with corrosion-resistant terminals and rubber-coated copper wiring
  • Lid with oversize hinge opens 180 degrees for easy connection
  • Constructed of extremely durable ABS plastic
  • Includes self-tapping screws and nylon ties for installation


Specs:

  • Harness length: 10'
  • 5-Year limited warranty


8555002 Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug - 10'

Installation Details DM8555002 Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug - 10' Long - DM8555002

Average Customer Rating:  4.9 out of 5 stars   (21 Customer Reviews)

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.

- DM8555002
by:

Perfect fit. Arrived to me quickly. Thanks Paula at etrailer!


Comments
Great product!
Rick - 05/06/2021


- DM8555002
by:
2017 GMC Sierra 2500

Nice heavy duty wiring and plug ends. Great instructions and pretty easy install.



- DM8555002
by:
2016 Ford F-250-Super-Duty

Wiring harness was easy to install and is holding up nicely a year and half later. Great product and price too from etrailer.



- DM8555002
by:
Ram 3500

Easy quick install and plenty of cable to run this to any location within the bed of your truck. i installed this in my New 2020 GMC 3500 Denali in less than 30 minutes!! Perfect fit as always from etrailer!!



- DM8555002
by:
2013 Ford F-250 and F-350 Super Duty

Have not yet installed, but a well built part with clear and concise installation instructions. Plug and Play!


Comments
Still happy with all of it.
Charley S - 10/23/2017



- DM8555002
by:
2016 GMC Sierra 2500

directions are miss leading . 2" hole isn't big enough as another tab has been added which makes swinging the plug thru the hole impossible . I have a dremel tool at home and ground a tab area for the tab to go thru and was easy as pie then . Plug hook up easy and all was good after getting it thru the hole.



- DM8555002
by:
2006 Chevrolet Silverado

While I had to wait for the product because of it was back ordered, the wait was not unreasonable and the etrailer staff keep me updated the whole time. The harness is high quality. Service was top notch.



- DM8555002
by:

As described easy to install



- DM8555002
by:

both products were shipped well packed and undamaged very impressed with the customer service and the shipping thanks again


Comments
good quality very satisfied thanks
Gregory - 04/04/2019



- DM8555002
by:

Good product fast shipping, I highly recommend etrailer



- DM8555002
by:

It is long enough, dose what I needed. Nice polite people to deal with. I got confuse when P.O. kept saying the cable cleared SLC P.O. and on way to me. Thank you and enjoyed doing business with you! Richard



- DM8555002
by:

Bonjour, très bon produit, connexion fait pour mon camion et facile à installer.



- DM8555002
by:

good produst easy to install



- DM8555002
by:

Good quality and fit



- DM8555002
by:
2011 GMC Sierra

Works great.



- DM8555002
by:
2015 Ford F-250 Super Duty

Good product fast shipping



- DM8555002
by:
2017 Chevrolet Silverado 3500

Easy install



- DM8555002
by:



- DM8555002
by:



- DM8555002
by:



- DM8555002
by:


21
21

Ask the Experts about this Demco Custom Fit Vehicle Wiring

  • 90 Degree 5th Wheel 7-Way Wiring Harness that Fits 2020 Ram 2500
    We have the Demco 5th Wheel 90 Degree Wiring Harness part # DM8555002 which fits your 2020 Ram 2500 and then for a 7-way you could install to your truck bed you'd want the part # A10-7072VP.
    view full answer...
  • 7-Way Connector for Socket Under 2015 GMC Sierra 2500 for 5th Wheel Trailer Wiring
    Sounds like you have found a round connector under your 2015 GMC Sierra 2500 like the picture I attached that was designed to have a 7-way plugged in with a part # PK11893-11932.
    view full answer...
    Image 1 for
  • Trailer Turn Signals and Brake Lights Not Working with 2011 GMC Sierra
    Chances are the problem you're having is caused by blown fuses. There are actually two fuses that service these lights. Your truck will have a fuse for the left turn signal and left brake light and another fuse for the right turn signal and right brake light. According to the owner's manual of your 2011 GMC Sierra the fuses are fuses 1 and 3 in your engine compartment fuse box. Replacing these will likely solve your issue. However, being that your truck isn't that old it's more...
    view full answer...
  • Does Demco 5th Wheel/Gooseneck Wiring Harness Fit 2020 Ram 2500
    So long as you have the factory 7-way, yes, the Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug # DM8555002 does fit the 2020 Ram 2500. This harness plugs into the factory wiring on your Ram and will allow you to use the 7-way at the rear of your vehicle as well if you also have a bumper tow trailer. This harness even includes the mounting screws for installation. I have added a link to a video review for you to check out as well of the Demco 5th Wheel/Gooseneck...
    view full answer...
  • Is Sliding Hitch Needed on 2019 Chevy Silverado 1500 if Trailer Has Orbital Pin Box
    The seller was correct and you will not need a new fifth wheel hitch for your 2019 Chevy Silverado 1500 since you have the MORryde Orbital Pin Box as this is a rotating pin box which will allow you to make a turn because it adds clearance. So you're good to go with your Reese hitch and won't have to add the expense of a new fifth wheel hitch. The only thing you may need for your '19 Silverado 1500 if you don't have one is a fifth wheel wiring harness, and for that I recommend the Demco...
    view full answer...
  • Can Gooseneck Hitch be Installed on 2020 Ram 2500 With RamBox
    Yes, you can install a gooseneck hitch on your 2020 Ram 2500 with the RamBox without issue as there won't be interference. For your 2020 Ram 2500, the best gooseneck is the B&W Turnoverball Underbed Gooseneck Trailer Hitch with Custom Installation Kit # BWGNRK1320. The Turnoverball hitch is the best in the industry because it has a square base for its hitch ball which ensures optimal strength and durability. What that means is the ball isn't going to turn when you are driving, keeping...
    view full answer...
  • Recommended 5th Wheel Hitch for a 2005 Ford F-150 5-1/2 Foot Bed
    I can help explain this evolution to you to help you better understand. The reason short bed trucks like your 5-1/2 foot Ford F-150 needed the sidewinder was because of clearance. A sliding hitch alone wouldn't give the camper/rv enough room when turning to not impact the truck cab. Due to popular demand the Sidewinder was born and allowed many short bed truck customers to tow because it moved the pivot point from a standard non-sliding hitch back 22 inches. The Sidewinder essentially...
    view full answer...
  • Where are the Connections Under the Hood of a 2013 GMC Sierra to Complete 7-Way Wiring
    Under the hood of your truck there are a few connections that need to be made near the fuse box in order to complete the 7-way's wiring. This will allow the brake output and 12 volt accessory circuit to be complete. Check out the help article I attached to see how to do this. You will have to scroll about half way down the page to see how this is done.
    view full answer...
  • 5th Wheel Hitch Compatible With Rotating Pin Box on 5-1/2 Foot Bed 2018 Chevy Silverado 1500
    Most - but not all - 5th wheel hitches are compatible with a rotating pin box on your camper. So the 5th wheel hitch I recommend for your 2018 Chevy Silverado 1500 with a 5-1/2 foot bed that is compatible with a rotating pin box is the Reese 5th Wheel Trailer Hitch # RP30047. I really like this hitch because it has a dual-jaw system that ensures a tight connection with your king pin, as well as a head that pivots four ways to make it simpler to hook up to your trailer. This is a great...
    view full answer...
  • Best Sliding 5th Wheel Hitch for 2019 Nissan Titan XD Short Bed With Factory Gooseneck
    The best fifth wheel hitch for your 2019 Nissan Titan XD short bed with the factory gooseneck is the Demco Hijacker Autoslide because you will never again need to get out of your truck just to make a turn, making your towing experience much more convenient. It also has a highly secure jaw system which ensures a complete, secure connection to your trailer's king pin as well as its cushioned head which will give you a smoother and quieter ride while towing. The Hijacker will mount onto...
    view full answer...
  • Do I Need a Sidewinder for a 2019 Ram 1500 with the 5-1/2 Foot Bed
    If you do not want to use a rotating pin box like the Reese Sidewinder on your 2019 Ram 1500 with the 5-1/2' bed then I do have one option, the Demco Hijacker Autoslide 5th Wheel Trailer part # DM8550040 paired with the Demco Hijacker Premier Series Above-Bed Base Rails and Custom Installation Kit part # DM8552032-71. The Demco Hijacker is an auto-sliding 5th wheel hitch which means it will move the connection point back away from the cab while making a sharp turn. This will eliminate...
    view full answer...
  • Correct B&W Turnoverball Underbed Gooseneck Trailer Hitch for 2020 Ram 3500
    We do have the correct parts you need to install the B&W Turnoverball gooseneck hitch on your 2020 Ram 3500, but the # BWGNRC920 is part of the kit for Chevy/GMC trucks. The part that you need - which includes the hitch as well as the mounting installation kit for your 2020 Ram 3500 - is the B&W Turnoverball Underbed Gooseneck Trailer Hitch with Custom Installation Kit # BWGNRK1320. I confirmed these fits with the manufacturer, B&W, for you. The only other thing you may need,...
    view full answer...
  • Compatibility of Demco Hijacker Autoslide 5th Wheel Hitch with 2019 Ram 2500 Short Bed
    Fifth wheel hitches aren't vehicle specific but the mounting kits used to attach the hitch to the truck are. To install your existing hitch on your 2019 Ram 2500, you'll need the Demco install Rail/Bracket kit, part # DM8552025-71. You can see an installation video by clicking the provided link. To install a 7-way trailer connector in the bed of your truck, you'd need a # DM8555002 wiring harness.
    view full answer...
  • Is Demco Hijacker Premier Series 5th Wheel Hitch Compatible With 2020 Ram 3500
    Your 2020 Ram 3500 is compatible with the Demco Hijacker Premier Series Double Pivot 5th Wheel Trailer Hitch # DM6076P-16K, but by ISR I'm not sure if you are talking about standard base rails or the 5th wheel prep package on the truck, which is the puck system. So just to be thorough, here is what you will need in your 2020 Ram 3500 to use the Demco Hijacker Premier Series Double Pivot 5th Wheel Trailer Hitch # DM6076P-16K: - Standard Above-Bed Base Rails such as the Demco Hijacker...
    view full answer...
  • How can I Adapt my Demco Autoslide Fifth wheel to my Nissan Titan XD with the Prep Package?
    We have exactly what you need! You will use the Replacement Side Plates for Demco Hijacker Autoslide 5th Wheel Trailer Hitches - Above Bed Mount part # DM6003 to connect to your autoslide then connect it to the Demco 5th Wheel Rail Adapter for Nissan Titan XD OEM 5th Wheel Towing Prep Package - 21,000 lbs part # DM6200. This combined with your autoslide will give you a great system and the auto slide will help out tremendously when doing those slow maneuvers. If you're not already...
    view full answer...
  • Can the Demco Hijacker 8550034 be Used with an Under Bed Mount Kit on a 2019 Chevy Silverado 3500
    Absolutely, the Demco Hijacker Autoslide 5th Wheel Trailer Hitch part # DM8550034 is for above bed mounting rails. However, you can make it compatible with the underbed mounting kit for your 2019 Chevrolet Silverado 3500 which is the Underbed Rail and Installation Kit for Demco Hijacker part # DM8551010 by obtaining the Replacement Side Plates for Demco Hijacker Autoslide 5th Wheel Trailer Hitches part # DM6004. I also recommend that you purchase an in-bed 7-way like the Demco 5th Wheel/Gooseneck...
    view full answer...
  • Auto Slide Hitch, Underbed Rail Kit, and Goose Neck Adapter For a 2020 Chevrolet Silverado 2500
    With your 2020 Chevy Silverado 2500 only having a 6-3/4 ft bed with out the OEM prep package it's recommended to use a slider to provide enough clearance between the nose of the camper and the cab of the truck. I recommend the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 21,000 lbs Item # DM8550037. This hitch provides you with the auto slide feature which takes the hassle away from getting out of your vehicle and pulling a lever to allow the hitch...
    view full answer...
  • Best 5th Wheel Hitch for Factory Pucks System in a 2020 Ram 2500 Long Bed
    For your 2020 Ram 2500 Long Bed I really like the Reese M5 5th Wheel Trailer Hitch for Ram Towing Prep Package - Single Jaw - 20,000 lbs part # RP30918 . This hitch is one of the easiest to use, offers great ride quality and is extremely well made. For wiring in the bed of your truck so you don't have to hang the trailer connector over the tailgate use the Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug - 10' Long part # DM8555002 I've linked the videos for you below.
    view full answer...
  • Availability of Auto Sliding Fifth Wheel Hitch for 2020 Ford F-350
    Demco offer an 18K or a 21K auto sliding fifth wheel hitch for your truck. For an 18K, use part # DM8550024 or # DM8550038 for a 21K capacity. These hitches are specifically designed to drop right into the existing pucks (initial adjustment might be needed) without needing an adapter of any kind. During turns, the hitch automatically slides rearward to provide additional clearance between the front of the fifth wheel and the rear of the truck cab during sharp turns. Once the turn's complete...
    view full answer...
  • Can 2015 Ram 2500 Crew Cab With 4WD and 6.7L Diesel Tow 19k Trailer With Andersen Hitch
    According to the towing capacities in the manuals I looked up online, your 2015 Ram 2500 Crew Cab with 4-wheel drive and 6.7L diesel can tow 15,940 lbs if it is a long bed manual transmission, 16,120 lbs if it is a short bed manual, 17,020 lbs for a long bed automatic transmission, or 17,180 if it is a short bed automatic. So those would be the max you can tow with that truck, even with the 20,000 lb capacity of the Andersen Ultimate Connection 5th Wheel Trailer Hitch System # AM3200. The...
    view full answer...
  • Recommended Fifth Wheel Hitch For 2020 GMC Sierra 2500 Short Bed With OEM Prep Package
    The Curt brand does manufacture quality fifth wheel hitches with thick dual jaws. However, there is not a Curt slider hitch option for the 2020 GMC Sierra 2500 with OEM prep package. You will need a sliding hitch for the short bed to insure cab clearance with the overhang of the fifth wheel. This will allow you to make sharper turns without knocking out your back window. I recommend to use the B&W Companion OEM 5th Wheel Hitch w/ Slider for Chevy/GMC Towing Prep Package part # BWRVK3775...
    view full answer...
    Image 1 for Image 2 for
  • 5th Wheel Hitch Compatible With Firestone Air Bags on 2002 Ford F-350
    The Firestone Ride-Rite air bags that fit your 2002 Ford F-350 are the Firestone Ride-Rite Air Helper Springs # F2550, and according to the manufacturer, these ARE compatible with an in-bed hitch, so you can definitely add a 5th wheel hitch to your truck. For that you will first need to add base rails, and the best option for that is the Demco Hijacker Premier Series Above-Bed Base Rails and Custom Installation Kit for 5th Wheel Hitches # DM8552006-71. The reason for that is the install...
    view full answer...
  • Demco Hijacker Autoslide 5th Wheel Hitch ofr 2019 Ram with OEM Tow/Prep Package
    The # DM6107 Replacement Head and Base Assembly is missing the necessary side plates needed to attach to the # DM6099 OEM puck adapters. The complete hitch is part # DM8550035. You'd also need the # DM6099 or the # DM6194 adapter that will allow the hitch to attach to the in-bed puck system. If you don't already have the 7-way trailer connector in your truck bed, you can install one using part # DM8555002. I've linked you to install/product demonstration videos as well as installation...
    view full answer...
  • Recommended Sliding 5th Wheel Hitch for 2013 Ram 3500 Diesel Short Bed Towing Sandpiper 379
    5th wheel towing is possible with short-bed trucks but it is certainly easier with a long bed. Short bed trucks will require either a sliding type hitch or a fixed hitch along with a Sidewinder replacement pin box on the trailer in order for you to have enough turning clearance to avoid trailer-to-cab contact. Long bed trucks avoid this issue completely; they can use standard fixed hitches and a new Sidewinder pin box is not required. You can refer to the linked articles for more on this. If...
    view full answer...
  • Recommended 5th Wheel Automatic Sliding Hitch for Ford Factory Prep Package Puck System
    For your 2015 Ford F-350 with 6-3/4 foot bed and SRW 4x4 there are many fits for your factory prep package. I recommend the Demco Hijacker Autoslide 5th Wheel Hitch w/ Slider - Single Jaw - Ford Super Duty Prep Package - 18K # DM8550024 which will adjust to give you turning clearance as you drive. This hitch will fit in your OEM pucks as will larger 21K # DM8550038 if you have a heavier trailer. You may also want to consider adding a second 7-way in the bed of your truck using...
    view full answer...
  • Underbed Demco Fifth Wheel Autoslider Hitch and Rail Kit Recommendation
    The correct Demco underbed rail kit you'd need for your 2008 Ford F-250 short bed is the part # DM8551000. This is a custom fit kit designed for your truck specifically. Then when it comes time for an auto slider hitch you'd want the part # DM8550022 for an 18k hitch or part # DM8550037 for if you need a 21k hitch. For a 7-way relocation kit to put a 7-way in the bed of your truck you'd then want the Demco Kit part # DM8555002 and you'd be set.
    view full answer...
  • Recommended 5th Wheel Hitch Adapter for GMC Factory Rail Kit Puck System
    For your 2018 GMC Sierra 2500 you will need the Demco 5th Wheel Rail Adapter for Chevy/GMC OEM 5th Wheel Towing Prep Package - 6-1/2' Bed - 21K # DM6194 to adapt your factory rail kit to your 5th wheel hitch. If you don't have a slider base on your 20K Reese hitch, you will also want the Reese Square Tube Slider for 5th Wheel Trailer Hitch - 10" Travel # RP30048 unless your trailer has a Revolution or Sidewinder Pin Box to allow you enough turning clearance. You may also want to consider...
    view full answer...
  • How to Install the Demco 18K Hijacker Autoslide 5th Wheel Trailer Hitch on a 2011 GMC Sierra 2500
    In order to mount the Demco 18K Hijacker Autoslide 5th Wheel Trailer Hitch part # DM8550022 in the bed of your 2011 GMC Sierra 2500 you will need to use the Underbed Rail and Installation Kit for Demco Hijacker Hitches part # DM8551010. The Replacement Side Plates for Demco Hijacker Autoslide 5th Wheel Trailer Hitches part # DM6004 that you referenced is designed to allow the above bed version of the Demco 18K Hijacker Autoslide 5th Wheel Trailer Hitch part # DM8550034 to be used with...
    view full answer...
  • Recommended Fifth Wheel Hitch With Adjustable Height Setting
    I will be happy to explain which fifth wheel will give you the height you need tow your fifth wheel trailer. Yes, your numbers and measurements appear to be very accurate, thank you for being so detailed. We do recommend at least 6 inches of clearance between the top of the truck bed rails and the bottom of your trailer. The amount of squat will vary but estimating 2" to 3" is a fair assumption. Ideally you would want to prevent as much squat as possible and to do this I recommend suspension...
    view full answer...




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality custom fit vehicle wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate custom fit vehicle wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Andrew K
Video by:
Andrew K
Employee Joshua S
Video by:
Joshua S
Employee Kathleen M
Video by:
Kathleen M
Employee Jonathan Y
Video by:
Jonathan Y
Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
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 Amanda M
Written by:
Amanda M
Employee Shane H
Test Fit:
Shane H
Employee Robert C
Test Fit:
Robert C
Employee Clayton O
Test Fit:
Clayton O
Employee Hannah L
Updated by:
Hannah L
Employee Kristina F
Updated by:
Kristina F

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.