2002 GMC Sierra 1500 HD Trailer Wiring Harness

Your 2002 GMC Sierra 1500 HD 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 you desperately need.

We currently carry 4 Trailer Wiring Harness to choose from for your 2002 GMC Sierra 1500 HD, and our inventory prices range from as little as $31.49 up to $119.99.

On top of low prices, Advance Auto Parts offers 2 different trusted brands of Trailer Wiring Harness for the 2002 GMC Sierra 1500 HD. We only sell parts from trusted brands like CURT so that you can find quality parts you can count on.

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!

Trailer Wiring Harness for Your 2002 GMC Sierra 1500 HD

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

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

from

$31.49
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
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CURT – Dual-Output 6/4-Way Connector (Plugs into USCAR) (Part No.55664)

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

from

$46.49
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
See More

Husky Towing – 5Th Wheel Wiring Harness, 7 Way Blade, 7 Blade With Reinforced 90Deg Angle (Part No.30342)

5Th Wheel Wiring Harness, 7 Way Blade, 7 Blade With Reinforced 90Deg Angle

from

$119.99
Easily route towing electrical functions into the truck bed for 5th wheel and gooseneck trailers, while retaining electrical functions at the rear bumper of the vehicle. This harness allows you to directly plug into the factory USCAR connector under the truck and has terminated wires at the other end so you can hardwire different styles of plugs for use inside the truck bed.

Product Features:
  • Easily Route Towing Electrical Functions Into The Truck Bed For Fifth Wheel Trailers
  • Reinforced 90 degree angle
  • Plugs into OEM wiring system
  • Easy to install
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Husky Towing – Fifth Wheel T-Connector (Part No.30392)

Fifth Wheel T-Connector

from

$106.99
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
  • Reinforced 90 degree angle
  • Plugs into OEM wiring system
  • Easy to install
See More

FAQs for 2002 GMC Sierra 1500 HD Trailer Wiring Harness

What are the most popular Trailer Wiring Harness for the 2002 GMC Sierra 1500 HD?

With 2 brands you can trust, our most popular Trailer Wiring Harness for the 2002 GMC Sierra 1500 HD parts are:
Dual-Output 7/4-Way Connector (Plugs into USCAR)
from $31.49
This product is not rated
Dual-Output 7/4-Way Connector (Plugs into USCAR)
Trailer Wiring Harness
Dual-Output 6/4-Way Connector (Plugs into USCAR)
from $46.49
This product is not rated
Dual-Output 6/4-Way Connector (Plugs into USCAR)
Trailer Wiring Harness
5Th Wheel Wiring Harness, 7 Way Blade, 7 Blade With Reinforced 90Deg Angle
from $119.99
This product is not rated
5Th Wheel Wiring Harness, 7 Way Blade, 7 Blade With Reinforced 90Deg Angle
Trailer Wiring Harness