Home > Products > CURT > Tow Wiring > Towing Accessories > 7′ Custom Wiring Extension Harness (Adds 4-Way, 7-Way RV Blade to Truck Bed)

7′ Custom Wiring Extension Harness (Adds 4-Way, 7-Way RV Blade to Truck Bed)

By CURT

SKU: CU56003
$121.95

There is nothing like the luxury and power that go along with heavy-duty towing. 5th wheel RVs offer a deluxe, home-away-from-home experience unlike any other, while gooseneck trailers possess a strength that far surpasses most other trailer options. As with any trailer, however, 5th wheels and goosenecks must be equipped with the proper lighting and…

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Part
Tow Wiring, Towing Accessories
Brand
CURT
Product Year
2019, 2020, 2021, 2022, 2023, 2024, 2025
Make
Chevrolet, GMC
Model
Sierra 1500, Sierra 1500 Limited, Sierra 2500 HD, Sierra 3500 HD, Silverado 1500, Silverado 1500 LTD, Silverado 2500 HD, Silverado 3500 HD
Prop 65 Warning

California Residents:  Prop 65 WARNING

Additional Information

There is nothing like the luxury and power that go along with heavy-duty towing. 5th wheel RVs offer a deluxe, home-away-from-home experience unlike any other, while gooseneck trailers possess a strength that far surpasses most other trailer options. As with any trailer, however, 5th wheels and goosenecks must be equipped with the proper lighting and electrical systems, and tend to require even more complex connectors than a standard receiver-type trailer setup. Make things simple with a CURT 5th wheel / gooseneck extension harness. These wiring harnesses are designed to put an extra connector socket in the bed of your pickup truck while still retaining power to the rear connector socket mounted on your bumper. This is done by plugging into the back of the existing original equipment (OEM) harness and routing thr ough the body of the truck to a hole in the truck bed, providing a connector that is ready to accommodate your 5th wheel or gooseneck trailer.

This CURT extension harness provides connection points for both 4-way flat and 7-way RV blade connectors, and it comes in a length of 7′. It is compatible with select models of Chevrolet, Dodge, Ford, GMC, Nissan, Ram and Toyota (to verify your vehicle compatibility, see the CURT application guide at curtmfg.com). When you need a towing electrical solution that allows you to switch back and forth between your receiver hitch and specialized trailer hitch, CURT gets you plugged in

Features & Benefits:

  • 7′ Custom Wiring Extension Harness (Adds 4-Way, 7-Way RV Blade to Truck Bed)
  • Routes a dual-output socket into truck bed while retaining use of rear socket
  • Provides standard 4-way flat and 7-way RV blade
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • Allows for easy connection of 5th wheel or gooseneck wiring
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • 7′ extension with right-angle plug for easy installation
  • Spring-loaded dust covers keep connectors clean when not in use
  • Slit loom keeps wires contained and well protected

Warranty Policy
All product warranties are the warranties provided by the manufacturers. Check out our Warranty Policy for more details.

Shipping Policy
Most parts will ship next day and sometimes even the same day. If your part is special ordered these lead times do not apply and are subject to production lead times. Check out our Shipping Policy for more details.

Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.

Need Help?

Call our product expert

707-586-9633

WHERE TO BUY

Campway’s, Martinez (NEW!)

3430 Pacheco Blvd, Martinez, CA 94553
(925) 228-9310

Truck Tops USA, Santa Rosa

3944 Santa Rosa Ave, Santa Rosa, CA 95407, United States
(707) 586-9633

Campway’s, San Jose

1324 Oakland Road, San Jose, CA 95112, United States
(408) 453-1415

Campway’s, Martinez

4999 Pacheco Blvd, Martinez, CA 94553, United States
(925) 228-9310

Campway’s, Sacramento

3312 Power Inn Rd, Sacramento, CA 95826, United States
(916) 737-8677

Campway’s, Santa Rosa

3948 Santa Rosa Ave, Santa Rosa, CA 95407, United States
(707) 584-7141

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