Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug - 10' Long
Item # DM8555002
Retail:$262.74
Our Price: $100.51
You Save: $162.23
Confirmed to Fit
2015 GMC Sierra 1500
with factory 7-Way
Will this fit?
To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
This item qualifies for Free Shipping
In Stock
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.
- All Info
- Reviews (64)
- Q & A (0)
- Photos
2015 GMC Sierra 1500 - Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug - 10' Long
- Fifth Wheel and Gooseneck Wiring
- 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.
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'
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
- Product did not meet expectations
- Manufacturer issue
- Too difficult to install
Customer Reviews
Demco 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug - 10' Long - DM8555002
Average Customer Rating: 4.8 out of 5 stars (64 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.by: Joseph 04/26/2024
great having extra plugs so my fifth wheel plug is not rubbing my tailgate paint
by: Rob 02/11/2024
Super easy to install. Took me 15 min to get everything routed and hooked up.
by: Letteer11/09/2020
2017 GMC Sierra 2500
Nice heavy duty wiring and plug ends. Great instructions and pretty easy install.
by: Terry 01/31/2023
Ordered Demco harness for 2011 super duty and for some reason wiring did not match my 5th wheel. Contacted e trailer and was told to ship back and they would send new harness which they did. Installed new harness and works great. Thanks for the help
by: Gus11/07/2023
Have had it installed for a year now works great was easy to install. Would recommend great product.
by: Jon11/27/2022
Ordering was great, delivery was quick, but they dumped all the boxes in the middle of my drive and left, without letting me know. They couldve been stolen. Prices are high compared to others and previous orders I was able to get discounts. The hitch box was completely destroyed, taped and half open in transit. Hopefully no parts are missing. Something has to change. Destroyed boxes equals destroyed products.
by: Lon09/30/2023
still working good.
by: 03/21/2023
The hitch did not come with a cover to cover when not in use. I need a rain cap or cover
by: Ken12/14/2022
Missing a critical part in the box - bed bracket for cable to plug into. Customer Service was great and reordered and ask for warehouse to open box and make sure bracket and cable in new box. Waiting on email and new delivery
by: Ralph 02/14/2023
2021 Dodge Ram Pickup
great price, very good product, it is a plug in, no extra wiring needed,
put this on my 2021 dodge ram, took about an hour, awesome
by: Charley S.10/21/2016
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!
Charley S.
10/23/2017
Still happy with all of it.
by: Jim02/26/2022
2022 Dodge Ram Pickup
The Demco 5th Wheel/Gooseneck p/u bed connection is just what I needed. I have always just draped the connection from the trailer over my tailgate and down to the 7pin connector on the bumper, but this is so handy to have and makes it a neater connection. Since my 2022 Ram 2500 came with the hole already provided in the bed wall, it was a breeze to install.
by: Benny Hotard09/13/2017
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.
by: Robert 04/07/2020
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!!
by: Bradley02/01/2019
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.
by: Edward02/08/2022
Not to difficult to install. It will require 2 people to get the bolts torqued down. Handles a 14000 lb fifth wheel with ease
by: Jay H04/11/2017
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.
by: Shawn02/28/2022
Easy install. Connected to factory harness and was in in about 1/2 hour.
by: Don 07/08/2022
2019 Ram 2500
The video was fantastic as well as questions being answered in regards to my specific truck. Thanks again..
by: James12/15/2022
Love it. Rides great. Pulled over 20 models with it.
by: Richard10/16/2018
Bonjour, très bon produit, connexion fait pour mon camion et facile à installer.
by: Robert 12/15/2021
makes for a clean installation
by: Gregory04/04/2018
both products were shipped well packed and undamaged very impressed with the customer service and the shipping thanks again
Gregory
4/4/2019
good quality very satisfied thanks
by: Lance11/17/2022
Easy install!!!!
25
64
Show More Reviews
See what our Experts say about this Demco Custom Fit Vehicle Wiring
- Compatibility of Demco Hijacker Autoslide 5th Wheel Hitch with 2019 Ram 2500 Short BedFifth 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... - Part Needed to Add 2nd 7-Way to VehicleAll you need to add to your truck to give you a second active 7-way is a harness like Demco's # DM8555002. This plugs in behind the existing 7-way socket and gives you a second 10-foot harness and 7-way vehicle-type socket. This way both your goose neck trailer and your camper will have identical connection points with all power and lighting signals. You can use this as long as your current 7-way has a round U.S. Car connector like part # C56229 plugged in to the back of the socket. The...
view full answer... - Wiring Harness for 2018 Chevy Silverado 2500HD with Demco Hijacker Autoslide 5th Wheel HitchDemco's 21K Hijacker Autoslide 5th Wheel hitch # DM8550035 is an excellent choice for your 2018 Silverado 2500 with the OEM prep kit and it will install using matching rail kit # DM6194. For an in-bed wiring harness I recommend Demco's 5th wheel wiring kit # DM8555002 which plugs in at your factory 7-way. This harness will give you an easy to access point in the bed for connection of your 5th wheel's wiring. Please refer to the linked install video for the harness; and note that the factory...
view full answer... - Recommended Slider 5th Wheel Hitch With Clean Bed Once Removed for a 2016 Chevy Silverado 2500The best fifth wheel hitch option for a 2016 Chevrolet Silverado 2500 6.5' bed without prep package is the Demco Hijacker Autoslide 5th Wheel Trailer Hitch. The reason that this hitch is the best option is because of the auto-slide mechanism which will allow you to make tight turns without having to get in and out of the truck to adjust the hitch. It will also allow for a clean truck bed when using part # DM8550037 which is rated at 21,000 lbs with the Underbed Rail and Installation Kit...
view full answer... - Auto Slide Hitch, Underbed Rail Kit, and Goose Neck Adapter For a 2020 Chevrolet Silverado 2500With 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... - Will Demco Fifth Wheel Gooseneck 7-Way Kit Fit 2019 Ram 2500 with Ram BoxYes, the Demco 5th wheel/gooseneck 7-way wiring kit part # DM8555002 does fit your 2019 Ram 2500 Power Wagon. I am not exactly sure where the best place to mount the 7-way will be since you have the Ram Boxes but it would work on your truck just like any other truck.
view full answer... - Recommended No-Drill 5th Wheel Brackets for a 2023 Chevy Silverado 2500 Short BedIn order to install a fifth wheel hitch on a 2023 Chevrolet Silverado 2500 6-3/4 Foot Bed without OEM Prep Package you'll need to start with a frame bracket and base rail kit for which I recommend the Demco Premier Series Above-Bed Base Rails and Custom Installation Kit part # DM39FR. This kit provides you with a set of industry standard above bed base rails that will work with most fifth wheel hitches on the market and it does not require any drilling into the frame, just the bed. I...
view full answer... - Best Quality Sliding 5th Wheel Hitches for 2018 Ram 2500 Short BedIf your Ram 2500 with 6-1/2-foot bed has the factory 5th wheel prep (with mounting pucks in the bed) then I strongly recommend going with Demco's 18K Hijacker Autoslide # DM8550034 and the matching installation kit # DM6099. Not only does the Demco have 14-inches of slider travel (more than most slider hitches) it slides automatically when you make a turn. No more getting out of the truck (in the rain, of course) to release a manual slider. This USA-made Demco is shown in the linked video....
view full answer... - How to Install the Demco 18K Hijacker Autoslide 5th Wheel Trailer Hitch on a 2011 GMC Sierra 2500In 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... - Best 5th Wheel Hitch for 2020 Chevy Silverado 1500 with 5-1/2 Foot BedThe best fifth wheel hitch for a 2020 Chevrolet Silverado 1500 with 5-1/2' bed is the Demco Hijacker Autoslide 5th Wheel Trailer Hitch part # DM8550040 paired with the Demco Hijacker Premier Series Above-Bed Base Rails and Custom Installation Kit part # DM8552034-71. The Demco Hijacker has a unique auto-sliding mechanism which will work to provide turning clearance while making sharp turns which would otherwise be an issue due to the short truck bed. The best part is you don't have to get...
view full answer... - Recommended Fifth Wheel Hitch With Adjustable Height SettingI 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... - Recommended Best Sliding 5th Wheel Hitch For 2011 Chevy Silverado 2500 With 6-1/2 Foot BedThe best sliding 5th wheel hitch for your 2011 Chevy Silverado 2500 with 6-1/2 foot bed is the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 21,000 lbs # DM8550035. This hitch has 14 inches of travel front to back and automatically moves when making turns to give you adequate clearance. This hitch won't require you to get out of your truck to hit a lever and then slowly move forward or backwards to get the hitch to lock in position so you can turn...
view full answer... - 20,000 lb Sliding 5th Wheel Hitch for 2019 Ram 2500 and 5th Wheel Wiring HarnessThere are 20,000 lb sliding 5th wheel hitches that are a fit for your 2019 Ram 2500, though the Pro Series you asked about has been discontinued. So instead, the best option is from Curt, the A20 hitch, and Curt base rails. This will give you a drill-free base rail system (which is great for your truck), and one of the highest-quality 5th wheel hitches on the market due to it's superior jaw system. This means less rattle and a much, much more comfortable ride. The parts you need are the...
view full answer... - Recommended Underbed 5th Wheel Hitch Mount for 2017 GMC 1500 with 6-1/2 Foot BedThere is not a Reese Elite Puck System Underbed kit abailable for your 2017 GMC Sierra 1500. Your best option is to use the B&W Companion 5th Wheel Trailer Hitch w/ Slider - Dual Jaw - 20,000 lbs # BWRVK3400-5W along with the B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit - 30,000 lbs # BWGNRK1057. This combination will give you a gooseneck hitch, a clean bed, and a sliding 5th wheel hitch. If you want an automatically sliding hitch, then you will give...
view full answer... - Fifth Wheel Installation Kit For A 2002 Chevrolet Silverado That Works With Curt E16 # C16115After doing some research The Curt Custom Fifth Wheel Installation Kit # C16418-204 is confirmed to fit your 2002 Chevrolet Silverado and will work well with the Curt E16 5th Wheel Trailer Hitch # C16115. Using the Curt Custom Fifth Wheel Installation Kit # C16418-204 will minimize drilling and the brackets will mount to the existing holes on your Chevrolet Silverado's frame. The rails are compatible with Curt, Draw-Tite, Hidden Hitch, Reese, Valley and Husky 5th wheel hitches. Because...
view full answer... - Recommended 5th Wheel Wiring Harness for Truck Bed on 2003 Ford F-250 SuperCrew PickupSounds like you will need the Hopkins Endurance 5th Wheel/Gooseneck wiring harness # 40167. This harness plugs into existing wiring and retains use of factory 7-pole at the bumper. This harness' plugs use the square gray connectors. If you instead have the single round connector for both the 7-way and 4-way like our # HM40975 on your 2003 Ford F-250 SuperCrew then you will want the # DM8555002, to extend the 7-way into the bed of your truck. Both harnesses will allow you to retain wiring...
view full answer... - Trailer Turn Signals and Brake Lights Not Working with 2011 GMC SierraChances 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 than...
view full answer... - 5th Wheel Hitch Installation Kit for 2003 Ford F-250 Thank you for providing those important details about your 2003 F-250 that will soon be home to a new 5th wheel hitch. Since you have a short bed pickup you will need a slider type hitch to ensure enough turning clearance for your low-speed maneuvers. For a base rail/installation kit I suggest using a custom-fit option that reduces your overall install time and the amount of drilling needed. Since these industry-standard rails kits are not hitch-specific, you can use any brand of rail...
view full answer... - Recommended Sliding 5th Wheel Hitch for 2017 Ford F-250 Short Bed with Factory Puck SystemFor your 2017 Ford F-250 6-3/4 foot bed, I recommend the Curt A16 5th Wheel Trailer Hitch w/ Slider for Ford Towing Prep Package # C16520-16020. This hitch will give you a nice sliding hitch that will have a 3 point indicator system to confirm proper coupling and will also have the adapter for the puck system in your factory rail kit. It will give you 12 inches of travel between the two locked positions for turning clearance when needed. If you want a hitch that moves automatically...
view full answer... - Recommended Demco Hijacker Autoslide 5th Wheel Hitch for a 2020 GMC Sierra 2500 With Factory PucksThere's an 18K available as part # DM8550034 or a 21K available as part # DM8550035. Either hitch will need the # DM6333 mount to fit into the factory pucks. The Hijacker Autoslide is a great choice both for outstanding ride quality provided by the one piece wrap around jaw that holds the king pin tightly enough the much of the clanging and rattling is stopped as well as the convenience of not needing to get out of the truck to unlock the sliding mechanism on the fifth wheel hitch. If...
view full answer... - Best Autoslide Fifth Wheel Hitch With Underbed Rails for 2018 Chevy Silverado 2500For your 2018 Chevy Silverado 2500 there is a great auto-slide fifth wheel hitch available with underbed rails, the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider # DM8550022 which you would mount with Underbed Rail and Installation Kit for Demco Hijacker UMS # DM8551010 The Hijacker is a premier hitch with an automatic slider which is a great quality-of-life feature because it means not having to hop in and out of your Chevy just to make a sharp turn. This hitch offers complete...
view full answer... - Parts Needed to Install Demco Hijacker Autoslide DM8550024 on 2016 Ford F250 6.5ft w/ Factory RailsYes, the Demco Hihacker Autoslide # DM8550024 is the 18K 5th wheel hitch you ordered and will be compatible with your 2016 Ford F-250 6.5 foot bed with factory installed underbed rail kit. The Demco Hijacker Autoslide fifth wheel hitch # DM8550024 comes assembled from the factory to help make the installation easier and quicker. The only prep work necessary is to bolt on the side plates, which are included. You will not need any additional parts to install the Hijacker, but I did read...
view full answer... - Recommended Under Bed 5th Wheel System for a 2023 Chevy Silverado 2500 w/out the Prep PackageWe have something similar but there is no way to put a factory prep package in your 2023 Chevy Silverado 2500. I recommend the Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches item # BWGNRK1020-5W. This underbed system fits both the 6-3/4' and 8' bed lengths of the 2023 Silverado 2500. It has a 30,000 lbs capacity and provides you with a square gooseneck receiver capable of mounting a B&W Companion hitch in. There are two options for Companion 5th wheel hitches...
view full answer... - Recommended 5th Wheel Automatic Sliding Hitch for Ford Factory Prep Package Puck SystemFor 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 the...
view full answer...
Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
Video by:
Andrew K
Video by:
Kathleen M
Video by:
Jonathan Y
Edited by:
Lindsey S
Expert Research:
Jameson C
Video Edited:
Joshua S
Video Edited:
Jacob T
Video Edited:
Dustin K
Video Edited:
Chris R
Video Edited:
Zach D
Installed by:
Cole B
Written by:
Amanda M
Test Fit:
Shane H
Test Fit:
Robert C
Test Fit:
Ryan G
Test Fit:
Clayton O
Test Fit:
Bradley B
Updated by:
Hannah L
Updated by:
Kristina F
Updated by:
Carrie 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. Let us know if anything is missing or if you have any questions.
Rick
5/6/2021
Great product!