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7ft. Custom Wiring Extension Harness (Adds 4-Way; 7-Way RV Blade to Truck Bed)

Electrical Connectors

7ft. Custom Wiring Extension Harness (Adds 4-Way; 7-Way RV Blade to Truck Bed)

SKU: 56003

Fits 2020-2026 across 2 makes, 44 vehicles

$137.95
1
  • Fit checked against your vehicle
  • WeatherTech parts, priced and in one place
Description

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 through 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

Compatibility

This part is compatible with 44 vehicle(s)

Show all 44 vehicles
VehicleVersions
2022 Chevrolet Silverado 2500 HD Custom, WT, LTZ, LT, High Country partsCustom, WT, LTZ, LT, High Country
2022 Chevrolet Silverado 1500 Custom Trail Boss, LT, WT, RST, LTZ, High Country, ZR2, LT Trail Boss, Custom partsCustom Trail Boss, LT, WT, RST, LTZ, High Country, ZR2, LT Trail Boss, Custom
2022 Chevrolet Silverado 3500 HD High Country, WT, LT, LTZ partsHigh Country, WT, LT, LTZ
2022 Chevrolet Silverado 1500 LTD High Country, Custom Trail Boss, Custom, LT Trail Boss, LT, RST, WT, LTZ, SSV partsHigh Country, Custom Trail Boss, Custom, LT Trail Boss, LT, RST, WT, LTZ, SSV
2022 GMC Sierra 1500 Elevation, AT4X, SLE, SLT, Denali Ultimate, Denali, Pro, AT4 partsElevation, AT4X, SLE, SLT, Denali Ultimate, Denali, Pro, AT4
2022 GMC Pickup Sierra 1500 Limited SLE, Elevation, Denali, Pro, AT4, SLT partsSLE, Elevation, Denali, Pro, AT4, SLT
2022 GMC Sierra 3500 HD Pro, AT4, SLE, SLT, Denali partsPro, AT4, SLE, SLT, Denali
2022 GMC Sierra 2500 HD Denali, SLE, SLT, Pro, AT4 partsDenali, SLE, SLT, Pro, AT4
2023 Chevrolet Silverado 1500 High Country, ZR2, Custom, Custom Trail Boss, LTZ, PPV, LT, LT Trail Boss, RST, WT partsHigh Country, ZR2, Custom, Custom Trail Boss, LTZ, PPV, LT, LT Trail Boss, RST, WT
2023 Chevrolet Silverado 2500 HD LTZ, WT, High Country, LT, Custom partsLTZ, WT, High Country, LT, Custom
2023 Chevrolet Silverado 3500 HD LTZ, LT, High Country, WT partsLTZ, LT, High Country, WT
2023 GMC Sierra 3500 HD Denali, Pro, SLT, SLE, AT4 partsDenali, Pro, SLT, SLE, AT4
2023 GMC Sierra 1500 Denali, Pro, SLE, AT4X, SLT, Elevation, AT4, Denali Ultimate partsDenali, Pro, SLE, AT4X, SLT, Elevation, AT4, Denali Ultimate
2023 GMC Sierra 2500 HD SLT, Denali, SLE, AT4, Pro partsSLT, Denali, SLE, AT4, Pro
2024 Chevrolet Silverado 3500 HD High Country, LT, WT, LTZ partsHigh Country, LT, WT, LTZ
2024 Chevrolet Silverado 1500 Custom Trail Boss, Custom, RST, LT Trail Boss, PPV, High Country, LT, ZR2, WT, LTZ partsCustom Trail Boss, Custom, RST, LT Trail Boss, PPV, High Country, LT, ZR2, WT, LTZ
2024 Chevrolet Silverado 2500 HD LTZ, WT, Custom, High Country, LT, ZR2 partsLTZ, WT, Custom, High Country, LT, ZR2
2024 GMC Sierra 3500 HD Denali, AT4, SLE, SLT, Pro, Denali Ultimate partsDenali, AT4, SLE, SLT, Pro, Denali Ultimate
2024 GMC Sierra 1500 AT4, Pro, SLE, AT4X, Denali, SLT, Denali Ultimate, Elevation partsAT4, Pro, SLE, AT4X, Denali, SLT, Denali Ultimate, Elevation
2024 GMC Sierra 2500 HD SLE, AT4, Pro, Denali Ultimate, SLT, AT4X, Denali partsSLE, AT4, Pro, Denali Ultimate, SLT, AT4X, Denali
2025 Chevrolet Silverado 1500 Custom Trail Boss, PPV, WT, High Country, RST, LT, Custom, LT Trail Boss, ZR2, LTZ partsCustom Trail Boss, PPV, WT, High Country, RST, LT, Custom, LT Trail Boss, ZR2, LTZ
2025 Chevrolet Silverado 2500 HD WT, LTZ, High Country, Custom, ZR2, LT partsWT, LTZ, High Country, Custom, ZR2, LT
2025 Chevrolet Silverado 3500 HD LT, LTZ, WT, High Country partsLT, LTZ, WT, High Country
2025 GMC Sierra 3500 HD Pro, SLT, Denali, Denali Ultimate, SLE, AT4 partsPro, SLT, Denali, Denali Ultimate, SLE, AT4
2025 GMC Sierra 1500 Denali Ultimate, Denali, SLE, AT4X, AT4, Pro, SLT, Elevation partsDenali Ultimate, Denali, SLE, AT4X, AT4, Pro, SLT, Elevation
2025 GMC Sierra 2500 HD Pro, AT4, Denali, AT4X, SLT, Denali Ultimate, SLE partsPro, AT4, Denali, AT4X, SLT, Denali Ultimate, SLE
2026 Chevrolet Silverado 3500 HD LT, LTZ, High Country, WT partsLT, LTZ, High Country, WT
2026 Chevrolet Silverado 1500 Custom Trail Boss, WT, Custom, ZR2, RST, LT, PPV, High Country, LTZ, LT Trail Boss partsCustom Trail Boss, WT, Custom, ZR2, RST, LT, PPV, High Country, LTZ, LT Trail Boss
2026 Chevrolet Silverado 2500 HD Custom, LTZ, High Country, WT, LT, ZR2 partsCustom, LTZ, High Country, WT, LT, ZR2
2026 GMC Sierra 1500 Pro, SLT, AT4, SLE, AT4X, Denali, Elevation, Denali Ultimate partsPro, SLT, AT4, SLE, AT4X, Denali, Elevation, Denali Ultimate
2026 GMC Sierra 3500 HD Pro, AT4, Denali Ultimate, SLT, Denali, SLE partsPro, AT4, Denali Ultimate, SLT, Denali, SLE
2026 GMC Sierra 2500 HD SLE, Denali Ultimate, Pro, SLT, Denali, AT4, AT4X partsSLE, Denali Ultimate, Pro, SLT, Denali, AT4, AT4X
Specifications
Brand
CURT
Category
Electrical Connectors
UPC
612314560035
Prop 65
<! Triangle> WARNING: This product can expose you to chemicals including Di(2-ethylhexyl) phthalate; which is known to the State of California to cause cancer; and Di-n-butyl phthalate; which is know…