2003 Chevrolet Silverado 1500 Trailer Wiring Harness

Your 2003 Chevrolet Silverado 1500 might be the best vehicle you’ve ever owned. Or you may just be struggling to keep it highway-approved. No matter the situation, Advance Auto Parts has the Trailer Wiring Harness product you desperately need.

We currently carry 10 Trailer Wiring Harness products to choose from for your 2003 Chevrolet Silverado 1500, and our inventory prices range from as little as $18.29 up to $118.99.

On top of low prices, Advance Auto Parts offers 3 different trusted brands of Trailer Wiring Harness products for the 2003 Chevrolet Silverado 1500. We only sell parts from trusted brands like Hopkins so that you can find quality parts you can count on.

Don’t take our word for it - check out customer ratings and reviews to buy with confidence. We have 288 reviews on our Trailer Wiring Harness products for the 2003 Chevrolet Silverado 1500 from previous customers.

Have parts delivered straight to your home, or find the nearest Advance Auto Parts store to check out our Trailer Wiring Harness stock in-person!

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Trailer Wiring Harness for Your 2003 Chevrolet Silverado 1500

Search through our amazing selection of Trailer Wiring Harness products for your 2003 Chevrolet Silverado 1500 to find exactly what you’re looking for. Compare prices and reviews to choose the best part for you.

  • 40955, Multi-Tow® FORD / GM 7 Blade and 4 Flat Wiring Kit

    Hopkins - 40955, Multi-Tow® FORD / GM 7 Blade and 4 Flat Wiring Kit (Part No. 40955)

    Description
    Tow more than one trailer? Multi-Tow® design feature adds multiple towing options from one connector by providing sockets for towing both 7 blade and 4 flat trailers. This connector is Plug-In Simple!® with no cutting or splicing, saving you time by utilizing an OEM connector to create an exact fit for easy installation and maximum weatherproofing.

    Product Features:
    • Multi-Tow® provides multiple towing options from one connector
    • Plug-In Simple!® Wiring Kit
    • Utilizes OEM connectors create an exact fit and maximum weatherproofing
    • Includes mounting bracket and hardware
    • Impact and corrosion resistant
    • Fits in standard 7 blade bracket
    • Includes Step-By-Step Instructions
    4.0
    Read 3 review(s)

    Review snapshot ® by PowerReviews

    4.0
    4.0
    • 1
      1
      2022-07-24
      1
      1

      Does NOT fit an OEM 2017 Audi Q7 as advertised!

      Does NOT fit an OEM 2017 Audi Q7 as advertised!

      Submitted 2022-07-24

      By TT

      From Peachtree City, GA

      Even with the included mounting bracket, the screw holes do not line up with the mount on the vehicle. As the tow package is OEM, advertising that this is an 'exact' fit for my vehicle is false. In addition, even if the holes lined up, the included bolts are 5/8" too short. I had bought longer bolts before realizing that the holes didn't line up. I am very dissatisfied with this blatantly false advertising.

      Bottom Line not recommended

      Even with the included mounting bracket, the screw holes do not line up with the mount on the vehicle. As the tow package is OEM, advertising that this is an 'exact' fit for my vehicle is false. In addition, even if the holes lined up, the included bolts are 5/8" too short. I had bought longer bolts before realizing that the holes didn't line up. I am very dissatisfied with this blatantly false advertising.

      By TT from Peachtree City, GA

      BOTTOM LINE not recommended

    • 5
      5
      2021-10-18
      5
      5

      Works great

      Works great

      Submitted 2021-10-18

      By David

      From Undisclosed

      Direct fit plug and play wiring harness for my 04 chevy silverado connects into factory harness above spare tire my truck didn't have factor tow package u will need 2 fuses for fuse box under hood and connect the wire also

      Bottom Line NULL

      Direct fit plug and play wiring harness for my 04 chevy silverado connects into factory harness above spare tire my truck didn't have factor tow package u will need 2 fuses for fuse box under hood and connect the wire also

      By David from Undisclosed

      BOTTOM LINE NULL

    • 5
      5
      2021-01-20
      5
      5

      I would but this product again

      I would but this product again

      Submitted 2021-01-20

      By Harry

      From Undisclosed

      Had to replace my 7 pin plug this plugged right in to the factory wiring, fixed my problem.

      Bottom Line NULL

      Had to replace my 7 pin plug this plugged right in to the factory wiring, fixed my problem.

      By Harry from Undisclosed

      BOTTOM LINE NULL

    from $39.99

  • Dual-Output 7 & 4-Way Connector (Plugs into USCAR)

    CURT - Dual-Output 7 & 4-Way Connector (Plugs into USCAR) (Part No. 55774)

    Description
    A CURT custom wiring connector (sometimes called a T-connector) is a simple, plug-and-play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle-to-trailer wiring. Most vehicles do not come ready to tow. Unless your vehicle has a towing package, it is probably not equipped with a trailer wiring connector. This is where CURT's custom wiring connectors come into play. A custom wiring connector uses a single original equipment plug to plug into a special socket provided by your vehicle. Though this option is not available on every vehicle, some automotive manufacturers design their vehicles to be easily equipped for towing by supplying a socket, integrated into the vehicle's electrical system, to readily accept a custom wiring connector. With a CURT custom wiring connector, there is no need to tap into the taillight assembly because a special socket is already provided. This special custom wiring connector actually provides two connector sockets for a multipurpose option. It plugs into an OEM connector and offers a 4-way flat and 7-way RV blade connector. It comes with a mounting bracket for easy installation and is designed to be a custom wiring option for a variety of vehicles (see application info to verify fitment). CURT custom wiring connectors are designed to be long-lasting and simple to install. They come with dust covers to keep your connector clean when not in use.

    Product Features:
    • Plugs into USCAR socket to provide 4-way and 7-way trailer wiring connectors
    • Fits USCAR-equipped vehicles with factory tow plugs only
    • Simple plug-and-play design eliminates the need for cutting or splicing
    • 4-way flat output connects tail lights, brake lights and turn signals
    • 7-way RV blade socket adds reverse lights, electric brakes and auxiliary power
    • Dust covers included to keep connectors clean when not in use
    • Slit loom keeps wires contained and well protected
    • Metal bracket securely mounts wiring to the vehicle or trailer hitch
    • Backed by a limited one-year warranty

    from $29.99

  • Dual-Output 6 & 4-Way Connector (Plugs into USCAR)

    CURT - Dual-Output 6 & 4-Way Connector (Plugs into USCAR) (Part No. 55664)

    Description
    A CURT custom wiring connector (sometimes called a T-connector) is a simple, plug-and-play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle-to-trailer wiring. Most vehicles do not come ready to tow. Unless your vehicle has a towing package, it is probably not equipped with a trailer wiring connector. This is where CURT's custom wiring connectors come into play. A custom wiring connector uses a single original equipment plug to plug into a special socket provided by your vehicle. Though this option is not available on every vehicle, some automotive manufacturers design their vehicles to be easily equipped for towing by supplying a socket, integrated into the vehicle's electrical system, to readily accept a custom wiring connector. With a CURT custom wiring connector, there is no need to tap into the taillight assembly because a special socket is already provided. This special custom wiring connector actually provides two connector sockets for a multipurpose option. It plugs into an OEM USCAR connector and offers a 4-way flat and 6-way round connector (see application info to verify fitment with your vehicle). It also comes with a mounting bracket for easy installation. CURT custom wiring connectors are designed to be long-lasting and simple to install. They come with dust covers to keep your connector clean when not in use.

    Product Features:
    • Plugs into USCAR socket to provide 4-way and 6-way trailer wiring connectors
    • Fits USCAR-equipped vehicles with factory tow plugs only
    • Simple plug-and-play design eliminates the need for cutting or splicing
    • 4-way flat output connects tail lights, brake lights and turn signals
    • 6-way round socket adds connection for electric brakes and auxiliary power
    • Dust covers included to keep connectors clean when not in use
    • Slit loom keeps wires contained and well protected
    • Metal bracket securely mounts wiring to the vehicle or trailer hitch
    • Backed by a limited one-year warranty

    from $44.49

  • Vehicle Wiring Kit

    Hopkins - Vehicle Wiring Kit (Part No. 41155)

    Description
    Dont splice onto your vehicles factory wiring harness. Simply plug in this Hopkins® vehicle wiring kit featuring exact OEM matching connectors for a perfect weather-tight fit. This kit includes the accessories needed to get you towing faster.

    Product Features:
    • Plug-In Simple® Wiring Kit
    • Utilizes OEM Connectors For Enhanced Fit And Weatherproofing
    • Includes Vehicle Side 4 Flat
    • Corrosion Resistant Terminals
    • Impact And Corrosion Resistant
    • Includes Dust Cover And Grease Packet To Prevent Corrosion
    • Includes Step-By-Step Instructions

    from $25.99

  • Wire Harness 7 Blade

    Husky Towing - Wire Harness 7 Blade (Part No. 30342)

    Description
    Easily route towing electrical functions into the truck bed for 5th wheel trailers, while retaining electrical functions at the rear of the vehicle.

    Product Features:
    • Easily Route Towing Electrical Functions Into The Truck Bed For Fifth Wheel Trailers
    • Limited 1 Year Warranty

    from $118.99

  • TrailerWireConnector

    Husky Towing - TrailerWireConnector (Part No. 33059)

    Description
    Husky Towing Products Offers Innovative Designs, High Quality, Custom Installation And Safe, Easy Operation. Husky Is Source For A Complete Line Of Hitches, Electrical Products And Towing Accessories.

    Product Features:
    • Provides Multiple Towing Options From One Connector
    • Connects To Your Vehicle OEM Tow Package Connector
    • Exact OEM Replacement For Enhanced Fit And Maximum Weatherproofing
    • Applies To Over 18 Different Vehicle Makes Equipped With A Factory Tow Package
    • High Impact, ABS Plastic Construction
    • Limited 1 Year Warranty

    from $44.99

  • 5TH Wheel T-Connectr

    Husky Towing - 5TH Wheel T-Connectr (Part No. 30392)

    Description
    Easily route towing electrical functions into the truck bed for 5th wheel trailers, while retaining electrical functions at the rear of the vehicle.

    Product Features:
    • Easily Route Towing Electrical Functions Into The Truck Bed For Fifth Wheel Trailers
    • Limited 1 Year Warranty

    from $106.99

  • TrailerWireConnector

    Husky Towing - TrailerWireConnector (Part No. 33058)

    Description
    Product Features:
    • Connects To Your Vehicle OEM Tow Package Connector
    • Easy Open, Weatherproof Lid With Rugged, Oversized Hinge Allows Lid To Open 180 Degrees
    • Impact And Corrosion Resistant
    • Plug In Simple(R) : No Cutting, No Splicing, Saves Time
    • Limited 3 Year Warranty

    from $53.99

  • TrailerWireConnector

    Husky Towing - TrailerWireConnector (Part No. 13092)

    Description
    Husky Towing Products offers a complete line of hitches, brake assemblies, jacks, sway control solutions, and essential towing accessories. Each Husky product is precision engineered, constructed with durable, quality materials, and is rigorously tested to industry safety standards. Hitches are what Husky does best. From Class III receivers, to 5th wheels, to weight distribution hitches, Husky hitches help keep your towables safe and secure. Husky also offers accessories to accompany your hitch including hitch balls, shanks, locks, and more. Electric tongue jacks, electrical and brake products, and cargo carriers are just a few other categories that make any towing experience easier.

    Product Features:
    • Husky Branded Replacement Parts Ensure Proper Fit And Function
    • Direct Fit Replacements Ensure Easy, Trouble Free Installation
    • Husky Branded Replacement Parts Support The Original Product Warranty
    • Limited 1 Year Warranty

    from $51.99

  • TrailerWireConnector

    Husky Towing - TrailerWireConnector (Part No. 30175)

    Description
    Husky Towing Products offer innovative designs, high quality, custom installation and safe, easy operation. Husky is source for a complete line of hitches, electrical products and towing accessories.

    Product Features:
    • Durable Lid Opens 180 Degrees
    • Ultimate Weatherproofing
    • Compatible With Ford, GM And Other Popular Tow Vehicles
    • Plug In Simple.(R) For Quick And Easy Installation Or Replacement
    • Limited 3 Year Warranty

    from $18.29

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