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  1. Custom Fit Vehicle Wiring
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  4. Fifth Wheel and Gooseneck Wiring
  5. 7 Round - Blade
  6. 7 Feet Long
Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector for Aluminum Beds - 7' Long

Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector for Aluminum Beds - 7' Long

Item # C57008
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Mount this 7-way connector in your aluminum truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole. 1-636-306-4830 to order CURT custom fit vehicle wiring part number C57008 or order online at Free expert support on all CURT products. Guaranteed Lowest Price and Fastest Shipping for Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector for Aluminum Beds - 7' Long. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (106)
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  • Why etrailer?

CURT Custom Fit Vehicle Wiring - C57008

  • Custom Fit
  • Fifth Wheel and Gooseneck Wiring
  • 7 Round - Blade
  • CURT
  • 7 Feet Long

Mount this 7-way connector in your aluminum truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole.


  • Provides 7-way, blade-style connector in your truck bed for hassle-free hookup of 5th-wheel and gooseneck trailers
    • Connector mounts in truck bed sidewall, tailgate post, or wheel well
  • Retains factory 7-pole trailer connector at rear of truck (if present)
  • Plugs into factory wiring - no cutting or splicing
    • 7' Long, insulated wiring harness reaches from rear bumper to truck bed
    • Requires that truck have factory tow package
  • Custom fit for your vehicle
  • Includes zip-ties, 4 stainless steel bolts, and 4 rubber well nuts for installation
    • Rubber well nuts separate the included stainless steel bolts from your aluminum truck bed to help prevent galvanic corrosion


  • Harness length: 7'
  • Wire configuration:
    • Yellow: reverse lights
    • Green: tail lights
    • Brown: right turn and brake lights
    • Blue: electric brakes
    • Black: 12V battery charge
    • Red: left turn and brake lights
    • White: ground wire
  • Limited 1-year warranty

57008 Curt Custom Vehicle-to-Trailer Wiring Harness Extension - 7 Foot

Replaces C56070-07

Installation Details C57008 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector for Aluminum Beds - 7' Long - C57008

Average Customer Rating:  4.9 out of 5 stars   (106 Customer Reviews)

Mount this 7-way connector in your aluminum truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole.


Great product. Plug and play mostly. I would be willing to spend a few more bucks if they sold it with the hole saw bit and the grease as a package deal. The plug is very easy to install. It helps to lowered the spare tire down to make room to make the connection, then all you have to do is cut a hole in the inside of the box, route the cord and mouth the outlet.

2017 Ford F-250 Super Duty

ANY time I need something related to trailer parts or towing, etrailer is my source and suggestion for others

Worked Great, very simple
Lester - 06/13/2022


First, what I like. This system was easy to install. The cable length was perfect. The connector system to splice into the stock connectors was perfect. The directions accurately detailed the hole-saw size needed to drill in the truck bed. The umbilical from my 5th wheel seats securely. The problem I have is the mounting screws. The screws are steel while the 2020 F250 bed is aluminum, meaning there is the possibility of corrosion with dissimilar metals. The connectors design solution is rubber grommets to isolate the steel from aluminum. With only a few plug/unplug cycles, the grommets failed, the connector came loose. I had to remove the mounting system and replace with steel bolts, using silicone caulk to provide corrosion protection. Bottom line, connector mounting system doesn’t work.

Ford F-150

Everything I ordered still in the box since I realized my 1/2 ton F150 didn’t have the capacity for a fifth wheel trailer.


I had no trouble installing this myself.


Fit perfect plug and play still works today


This harness was perfect for my fifth wheel. It’s plug & play and connects directly to the factory pigtail.


Out standing easy install

2018 Ford F-250 Super Duty

This was a C57008 for a '18 F250 6' box. The item was delayed because of the new vehicle. But etrailer kept me well informed of the progress. The plug system was so convenient without having to splice the right wires and the 7' length was just long enough to locate the socket just ahead of the wheel well for my slide in camper. It also included a nifty isolation kit to avoid screwing directly to the aluminum bed.


works really love that it worked out well with the aluminum body. plug and play literally. Well maybe a zip tie to hold things in place


Nice product

2019 Ford F-250 Super Duty

This harness is exactly what I needed for our new 5th wheel to get a plug close to the pin box but not lose the plug in the bumper. The quality is good and the install is simple. The only, very small, negative is the wire ties that are supplied with it are terrible, they all broke very easily. No problem, who doesn't have a supply of them already...

2017 Ford F-250 Super Duty

Perfect ready to use,easy to install,thanks


Very simple install, good quality.


Installed this plug over a year ago. Was easy to install and it has worked flawlessly.


Easy to install


this was the easy and only way to install a gooseneck hitch assembly.
all worked as it should, and done in about 30 minutes, start to finish.


With the new Fords having aluminum beds we were very careful to ensure the we had good isolation. It was pretty much a step by step installation. Take the time to insure shape surfaces are rounded and not cutting sharp, especially after drilling holes. A little extra time spent on the installation could save headaches down the road.


easy to install, plug and play


Excellent service! Called in my order and received my order in just a couple of days. The Curt 7 pole connector for al beds was easy to install and works perfectly for my 5th wheel. Highly recommend etrailer!!!

2017 GMC Canyon

etrailer is top when it comes to helping their customers. Out of stock and rushed it from the manufacturer to arrive just before our spring break trip. That means a lot to a Dad that promises a camping trip to the Grand Canyon.
Oh it fits perfectly inside my truck bed

2017 Ford F-350 Super Duty

Installation was straightforward but the plug would not go up inside of the rear post on my 2017 F350. I ended up putting the receptacle forward of the rear post in the side of the bed.

2017 Ford F-250 Super Duty

Super easy to install, took about 20 minutes. Works great!


This plug assembly was very easy to install. Great value for the price.

This product has worked flawlessly.
Steven - 05/13/2021


Very fast service excellent

Show More Reviews

See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • What Size Pilot Hole do I Need to Drill to Install the Curt In Bed Custom Wiring Harness
    When installing the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector part # C57008 you will drill a 7/64" hole at all four of the mounting holes. This is what is stated in the instructions and will be the best practice to follow. When we do them here at etrailer sometimes we do not drill the pilot holes and it works for us but keep in mind I personally have done at least 80 of them so we are pretty practiced at it. I have included a video for you to check out of my buddy...
    view full answer...
  • Will Curt Fifth Wheel and Gooseneck Wiring Harness for Aluminum Truck Beds Fit 2017 Ford F-250
    Yes, I confirmed with Curt that the # C57008 fifth wheel and gooseneck wiring harness will fit the 2017 Ford F-250 and the F-350.
    view full answer...
  • Difference Between Two Fifth Wheel Wiring Harnesses for 2015 Ford F-150
    Both Curt Fifth Wheel Wiring Harnesses # C57010 and # C57008 install in the same way and will work in your 2015 Ford F-150. The reason for the different lengths is to give users the more options on where they would like to install the 7-way.
    view full answer...
  • Will 5th Wheel Trailer Come Out of B&W Companion?
    The B&W Companion fifth wheel hitch # BWRVK3305 offers interlocking jaws that surround the kingpin at 360 degrees, so the trailer will not come out of the hitch. When you hook up to your fifth wheel trailer the king pin on your trailer slides into the jaws on your hitch and there is a locking pin that locks that king pin into the hitch. If the trailer you're towing is under 25,000 pounds fully loaded, this hitch will have no problem with your trailer. There will always be some noise coming...
    view full answer...
  • Fit of Demco DM8550045 Recon 5th wheel Hitch w/ FactoryTow/Prep Package on 2020 Ford F350
    If your 2020 Ford F-350 is a long bed model, or if your 5th wheel has the dished-in front corners to allow turning clearance so the front of the fifth wheel doesn't collide with the rear of the truck cab, then yes, the Demco # DM8550045 Recon would be a good choice that's compatible with the Ford Factory Goosneck ball that fits in the factory tow/prep package. This hitch isn't compatible with rotating pin boxes such as the Reese Sidewinder/Revolution or the Lippert Turning Point. If...
    view full answer...
  • Which Gooseneck Hitch For a 2017 Ford F-350 Without the Factory Prep Package
    The OEM "prep" package just refers to already having 4 puck style mounting points and a gooseneck hitch already installed in your truck, so if you don't already have one then you will want to select the choice for a 2017 Ford F-350 without the OEM Prep package. The best available gooseneck hitch for your 2017 Ford F-350 with the single rear wheel is the B&W # BWGNRK1116, which is renowned for their durability and quality. This hitch will install without any drilling required since it...
    view full answer...
  • Does B&W Turnoverball Gooseneck Hitch From 2017 Ford F-350 8' Bed Fit A 2021 Ford F-250 6-3/4' Bed?
    The B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit - 30,000 lbs # BWGNRK1116 you had installed in your 2017 Ford F-350 4WD with the 8' Bed will fit perfectly in your new 2021 Ford F-250 4WD with the 6-3/4' bed. The # BWGNRK1116 came with the inner brackets, but since your older truck has them factory installed you didn't need them. If you still have them laying around you can use them, or if they are long gone you can reach out to B&W to order the replacements. To...
    view full answer...
  • Recommended In-Bed 7-Way for a 2020 Ford F-350
    I would be happy to help you. I recommend the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 10' Long item # C57008 for your 2020 Ford F-350. This is designed for aluminum beds like your model truck has. This harness puts a 7-way connector in the bed of your truck and allows you to keep the one on your bumper. This makes hooking up to your 5th wheel trailer easier and more convenient.
    view full answer...
  • Recommended Base Rails for Mounting 5th Wheel Hitch in 2019 Ford F-250 Super Duty
    As long as the 5th wheel hitch you'll be using mounts in the industry standard 5th wheel rails, you can use the Curt # C16428-204. These rails are a custom fit for your 2019 Ford F-250, so they will install without drilling and allow you to mount a 5th wheel hitch in your truck bed using the above bed rails. Since you'll be towing a 5th wheel trailer, I would also recommend adding a 7 way connector to your truck bed using the Curt # C57008 to help make connecting to the wiring harnesses...
    view full answer...
    Image 1 for
  • Recommended 5th Wheel Hitch and Wiring Harness for a 2017 Ford F-250 with Prep Package
    Yes, the Curt E16 5th Wheel Trailer Hitch w/ Slider for Ford Towing Prep Package part # C16515-16020 is a confirmed fit for your 2017 Ford F-250 with the factory prep package. It comes with both the slider and hitch head which is everything you need to haul a 5th wheel trailer. If you do not already have an in-bed wiring harness then I recommend the Curt 5th Wheel/Gooseneck Custom Wiring Harness part # C57008. I have attached a review video of the hitch and wiring harness for you as well.
    view full answer...
  • Recommended Base Rails for Mounting 5th Wheel Hitch in 2017 Ford F-250 Super Duty
    The item you linked to is the Curt Custom 5th Wheel Installation Kit for Ford, # C16428-204. This fits both the 8 foot bed and the short bed configuration of your 2017 Ford F-250 Super Duty. If the 5th wheel hitch you are wanting to install requires Industry Standard Rails (ISR), this # C16428-204 is my recommendation as they are a custom fit installing without drilling required. If needed, I suggest the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector for Aluminum...
    view full answer...
  • Installing Curt Wiring Harness In 2018 Ford F-150 With Aluminum Bed
    I have a solution which is going to allow you to use your Curt # C56070 harness with your 2018 Ford F-150, though you will not want to use aluminum screws. Instead, you will just need the Curt Isolation Hardware Kit for 7-Way RV Plugs in Aluminum Truck Beds # C57007, which will give you just the 4 stainless steel bolts and 4 rubber well nuts that come with harness # C57008, but will not require you to purchase the entire harness.
    view full answer...
  • Curt Q25 5th Wheel Hitch Head Compatibility with Ford Prep Package Legs
    The Curt OEM 5th-Wheel Hitch Legs for Ford Super Duty Towing Prep Package - 24,000 lbs # C16017 will work with the Q25 hitch head, but it will limit your capacity to 24,000 lbs for your hitch. These are the legs that are used in the Curt Q25 5th Wheel Trailer Hitch for Ford Super Duty Towing Prep Package - Dual Jaw - 24,000 lbs # C16039 and why the total capacity is 24K instead of 25K. You may also want to consider the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector...
    view full answer...
  • Installing Curt 5th Wheel/Gooseneck Wiring Harness # C56070 on 2017 Ford F-250
    The Curt 5th Wheel/Gooseneck Custom Wiring Harness # C56070 referenced in your question will plug into the factory US connector on your 2017 Ford F-250 and the extended 7-Way will work perfectly. The issue with regards to fit on your 2017 model, as you alluded to, is the truck's aluminum body which requires some additional mounting hardware. The needed hardware is included with the Curt # C57008 Harness which is why it is the recommended option. What you can do to use the more economical...
    view full answer...
  • 5th Wheel 7-Way Kit Recommendation for 2020 Ford Super Duty Cab and Chassis
    We have 5th wheel trailer wiring kits that fit your 2020 Ford F-350 Cab and Chassis like with the part # C57008 but the part number you referenced does not fit your truck. The # C57008 does not install to the connectors you sent in a picture of though. These plug inline with the 7-way connectors at the rear of your truck.
    view full answer...
    Image 1 for
  • How To Use RBW 5th Wheel Hitch On 2016 Ford F-150
    The correct fifth wheel install kit you'll need to use to mount the RBW 5th Wheel Hitch on a 2016 Ford F-150 is the Reese Quick-Install Custom Installation Kit w/ Base Rails part # RP50087-58 which is a direct fit with no drilling into the frame required. Don't forget the Curt 5th Wheel/Gooseneck Custom Wiring Harness part # C57008.
    view full answer...
  • Compatible Puck System for 2020 F-350 Without OEM Prep Package
    Yes! The Reese Under-Bed Rail and Installation Kit # RP87FR will fit with your Pullrite adapter. What the Reese rails do is essentially give you the Ford puck mounting system. If you used your adapter with the OEM puck system on your old truck, it will be the same experience with the Reese system on your new one. If you don't already have one, you'll need a wiring harness like the Curt 5th Wheel/Gooseneck Custom Wiring Harness with 7-Pole Connector for Aluminum Beds # C57008.
    view full answer...
  • Recommended Fifth Wheel Base Rail Kit For A 2019 Ford F-150
    For your 2019 Ford F-150 I recommend the Reese Quick-Install Custom Outboard Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches # RP56034-53. This base rail kit has custom fit brackets that are designed to fit with the frame of your F-150 so that you don't have to drill into the frame during installation. I've attached a video below that will help walk you through the installation below. Note: Does not fit models with Ride Height Sensors. While you're adding in base rails I...
    view full answer...
  • Industry Standard 5th Wheel Bracket and Rail Kit for a 2018 F-150 XLT
    You have done your research well. I can confirm that both the Curt Custom 5th Wheel Installation Kit for Ford - Gloss Finish item # C16424-104 and the Curt Above-Bed Gooseneck Trailer Hitch for Fifth Wheel Rails item # 16055 are a confirmed fit for your 2018 Ford F-150 FX4 with a 5-1/2 foot bed. The Curt rail kit will provide you with industry standard rails that will fit not only your Curt 5th Wheel Hitch but also the Curt Gooseneck plate. I have linked a couple of review videos for both...
    view full answer...
  • How Much Does the Curt A16 with Rails and Brackets for a 2018 Ford F-150 Weigh
    The Curt A16 5th Wheel Trailer Hitch part # C16120 weighs around 100 lbs give or take a few lbs and the Curt Custom Fifth Wheel Installation Kit for Ford F150 part # C16442-204 which is for a 2018 Ford F-150 weighs around 70 lbs give or take a few lbs. If you don't already have an in-bed wiring harness to complete your fifth wheel towing setup, you can use the Curt 5th Wheel/Gooseneck Custom Wiring Harness part # C57008 which weighs around 2 lbs.
    view full answer...
  • Parts Needed To Install a 5th Wheel Rail Kit on a 2019 Ford F-250
    In order to install an above bed rail kit on your 2019 Ford F-250 (short or long bed), I recommend using the Curt Custom 5th Wheel Installation Kit part # C16428-204. This kit is all inclusive meaning it has everything that you need to install a 5th wheel hitch and it is also a custom fit so no drilling into the frame is required. I have attached an install video on this kit for you as well. If you don't already have a 5th wheel hitch then I recommend using the Curt A20 5th Wheel Trailer...
    view full answer...
  • Which Curt 5th Wheel Bracket Kit Fits A 2021 Ford F-250 Super Duty?
    I have another option for you, but the Curt 5th Wheel Bracket Kit # C16424 you were looking at only works with select Ford F-250/350/450s from 2011-2016. For your 2021 Ford F-250 Super Duty you will need the the Curt # C16428 instead. If you do not have the above bed rails already then you will also need the Curt # C16204. This will allow you to use a 5th wheel hitch that utilizes industry standard rails (ISR). Lastly since your truck does not have the OEM Towing Prep Package you may...
    view full answer...
  • Can 2017 Ford F-250 Short Bed 6.7L Diesel w/ 3.55 Axle Ratio Tow 14,000 lb 5th Wheel Trailer
    Since your dealer said your 2017 Ford F-250 short bed with a 6.7L diesel and 3.55 axle ratio can tow 16,500 lbs, you can tow a 5th wheel trailer that weighs a total of about 14,000 lbs without issue. You mentioned pin weight, and for a 5th wheel trailer that will be roughly 15 - 20 percent of your loaded trailer, or somewhere between 2,100 lbs and 2,800 lbs, so you'll want to check that against the GAWR, or axle rating, on the label on your door jamb, but it should be well above that...
    view full answer...
  • Is There a Reese 5th Wheel Hitch to Fit a 2019 Ford F-350 with 6-3/4 Foot Bed
    The Reese Titan was actually discontinued a few years ago so the complete hitch is no longer available. The hitch that took its place is the M5, part # RP30928. Generally we recommend sliding hitches for trucks with beds shorter than 8 feet but since you're 2020 Cedar Creek has a tapered nose you might get away with a fixed hitch. You can do some measuring and a little math to find out if you need a slider or not. Measure from the back of your truck's cab to location where the king pin...
    view full answer...

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