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CURT 7' Custom Wiring Extension Harness (Adds 4-Way, 7-Way Blade to Bed) 56003 fits 2019 Chevrolet Silverado 1500 / 2022 Chevrolet Silverado 1500 LTD / 2020 Chevrolet Silverado 2500 HD, Silverado 3500 HD / 2019 GMC Sierra 1500

⚠️ Please verify fitment before purchasing. Check the fitment chart below or use the Year/Make/Model tool to confirm this part fits your vehicle.

⚠️ Verify fitment before purchasing. Check the fitment chart below or click the 3 lines in the top left menu, select Home, then use the Year/Make/Model guide.

CURT
56003
Many in stock
$137.73 USD $96.99 USD
$96.99 USD

CURT 7' Custom Wiring Extension Harness (Adds 4-Way, 7-Way Blade to Bed) 56003 fits 2019 Chevrolet Silverado 1500 / 2022 Chevrolet Silverado 1500 LTD / 2020 Chevrolet Silverado 2500 HD, Silverado 3500 HD / 2019 GMC Sierra 1500
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


This Part Fits:

Year Make Model Submodel Notes
2019 Chevrolet Silverado 1500
2022 Chevrolet Silverado 1500 LTD
2020 Chevrolet Silverado 2500 HD
2020 Chevrolet Silverado 3500 HD
2019 GMC Sierra 1500
2022 GMC Sierra 1500 Limited
2020 GMC Sierra 2500 HD
2020 GMC Sierra 3500 HD


Specifications:

Box Height in Inches - XA 0
Box Length in Inches - XA 0
Box Width in Inches - XA 0
Color Black
Container Cases Qty - XA 0
Container Pallet Qty - XA 0
Container Unit Qty - XA 0
Container Volume Cubic Feet - XA 0.00000
Container Volume Cubic Meter - XA 0.00000
Container Weight KG - XA 0
Container Weight Lbs - XA 0
Electrical Package Type Packaged
Finish - XA Blank
Harness Length 7'
Item Class - XA CME
Item Height - XA 0.000
Item Length - XA 0.000
Item Width - XA 0.000
Master Case Height Inches - XA 10.750
Master Case Inner Pack Qty - XA 0
Master Case ITF14 0
Master Case ITF14 - XA 20612314560039
Master Case Length Inches - XA 18.500
Master Case Qty - XA 4
Master Case Volume Cubic Feet - XA 0.00000
Master Case Weight Lbs - XA 11.240
Master Case Width Inches - XA 8.500
Material - XA Blank
Mount Type Description - XA Not Applicable
Pallet Case Per - XA 0
Pallet Case Per Layer - XA 0
Pallet Cases Per - XA 40
Pallet Cases Per Layer - XA 10
Pallet Layer of Cases - XA 4
Pallet Qty - XA 0.000
Pallet Total Height Inches - XA 47.500
Pallet Total Weight Per - XA 479.600
Parcel Allowed - XA Yes
Product Weight - XA 0.000
Prop 65 Label Text - XA 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 known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
Prop 65 Material - XA Di(2-ethylhexyl) phthalate/Di-n-butyl phthalate
Prop 65 Reason - XA PVC Coated Wire
Prop 65 Warning Label Type - XA Cancer and Birth Defect Causing
Prop 65 Warning Y/N - XA YES
Rate Class - XA 100.0
Retail Height - XA 4.000
Retail Length - XA 8.000
Retail Width - XA 8.000
Sales Family Code - XA ELECT
Sales Family Description - XA ELECTRICAL COMPONENTS
Sales Group Description - XA ELECTRICAL ADAPTER
Shipping Weight - XA 2.560
Side Application Type Description - XA Not Applicable
T-Connector Location T4
Tariff 301 - XA No
29 Pin
Truckload Cases Qty - XA 0
Truckload Pallets Qty - XA 0
Truckload Units Qty - XA 0
Truckload Volume Cubic Feet - XA 0.00000
Truckload Weight - XA 0
Description_ABR ADAP1
Description_SHO Wiring Extension
Description_INV Custom Wiring Harness Extension
Description_ASC 7' Custom Wiring Extension Harness (Adds 4-Way, 7-Way RV Blade to Truck Bed)
Description_ASC Routes a dual-output socket into truck bed while retaining use of rear socket
Description_ASC Provides standard 4-way flat and 7-way RV blade
Description_ASC Simple plug-and-play design eliminates the need for cutting or splicing
Description_ASC Allows for easy connection of 5th wheel or gooseneck wiring
Description_ASC 4-way flat output connects tail lights, brake lights and turn signals
Description_ASC 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
Description_ASC 7' extension with right-angle plug for easy installation
Description_ASC Spring-loaded dust covers keep connectors clean when not in use
Description_ASC Slit loom keeps wires contained and well protected
Description_DES 7' Custom Wiring Extension Harness (Adds 4-Way, 7-Way RV Blade to Truck Bed)
Description_EXT CURT 56003 7-Foot Vehicle-Side Truck Bed 4-Pin, 7-Pin Trailer Wiring Harness Extension, Select Chevrolet, Dodge, Ford, GMC, Nissan, Ram, Toyota
Description_MKT 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

Description_FAB 7' Custom Wiring Extension Harness (Adds 4-Way, 7-Way RV Blade to Truck Bed)
Description_FAB Routes a dual-output socket into truck bed while retaining use of rear socket
Description_FAB Provides standard 4-way flat and 7-way RV blade
Description_FAB Simple plug-and-play design eliminates the need for cutting or splicing
Description_FAB Allows for easy connection of 5th wheel or gooseneck wiring
Description_FAB 4-way flat output connects tail lights, brake lights and turn signals
Description_FAB 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
Description_FAB 7' extension with right-angle plug for easy installation
Description_FAB Spring-loaded dust covers keep connectors clean when not in use
Description_FAB Slit loom keeps wires contained and well protected
Description_TLE CURT 56003 7-Foot Vehicle-Side Truck Bed 4-Pin, 7-Pin Trailer Wiring Harness Extension, Select Chevrolet, Dodge, Ford, GMC, Nissan, Ram, Toyota
Description_DEF Trailer Connector Kit
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