2021 GMC Sierra 3500 Trailer Wiring

Features:

Plugs into your vehicles USCAR port and works with 7-way or 4-way trailers - no adapter needed. Endurance features include a 180-degree lid swing and oversized cover to keep dirt out and hookups easy.

Installation Notes:

Product intended as a factory replacement harness or socket

Features:

Easily connect either a 7-way or 4-way trailer-end connector with this dual-outlet socket. Simply plug this into your vehicle's OEM USCAR wiring system and mount it with the included bracket.

Installation Notes:

Product intended as a factory replacement harness or socket

Features:

Mount this 7-way, RV-style connector in your truck bed to simplify hookup of your 5th-wheel or gooseneck trailer. Harness plugs into existing wiring and retains use of factory 7-pole at the bumper. 90-Degree-angled connector fits into tight spaces.

Tech Tip:

A Multi-Tow Connector (sold separately) may be required to fill the factory hole in the bed.

Features:

T-Connector works with fifth-wheel and gooseneck trailers and retains use of your vehicle's factory 7-way connector. It connects your factory 7-pole at the bumper to a new 7-pole in the truck bed. Adapter has a 90-degree angle for tight spaces.

Tech Tip:

A Multi-Tow Connector (sold separately) may be required to fill the factory hole in the bed.

Features:

Mount this 7-way, RV-style connector in your truck bed for quick hookup of your 5th-wheel or gooseneck trailer. Harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's 7-pole. Includes cover plate.

Features:

Mount this 4-way and 7-way, RV-style connector in your truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's 7-pole.

Features:

Get a 7-way, RV-style connector in your truck bed for easy hookup of your fifth-wheel or gooseneck trailer. 90-Degree harness plugs in-line with factory wiring and retains use of your 7-pole connection. Connector also provides a 4-way flat socket.

Tech Tip:

The trailer end 7-way on part HM41158 will need to be disconnected; it can be discarded or saved for another use. The harness can then be connected to part HM40975 and snapped into the cutout in the bed.

Features:

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into 7-way OEM tow package wiring harness - no cutting, splicing or tapping required.

Installation Notes:

For vehicles with factory tow package; may require additional components or may be used as a replacement harness

Features:

Mount this 7-way, RV-style connector in your truck bed to simplify hookup of your 5th-wheel or gooseneck trailer. Harness plugs into existing wiring and retains use of factory 7-pole at the bumper.

Tech Tip:

A Multi-Tow Connector (sold separately) may be required to fill the factory hole in the bed.

Features:

Tow Ready Fifth Wheel and Gooseneck Wiring Harness 7-Pole - GM, Ford, Dodge, Nissan and Toyota w/ Factory Tow

Features:

Tow a trailer with either a 7-way or 4-way plug with this dual vehicle-end connector. Included pigtail harness hardwires into your vehicle and the connector end mates with the 7-pole socket to form a weathertight seal.

Features:

Mount this 7-way connector in the bed of your truck for easy hookup of your fifth-wheel or gooseneck trailer. No cutting or splicing required. Harness tees into the factory 7-way at the rear of your truck.

Tech Tip:

A Multi-Tow Connector (sold separately) may be required to fill the factory hole in the bed.

Features:

Mount this 7-way, RV-style connector in your truck bed to simplify hookup of your 5th-wheel or gooseneck trailer. Harness plugs into existing wiring and retains use of factory 7-pole at the bumper. 90-Degree connector fits into tight spaces.

Tech Tip:

A Multi-Tow Connector (sold separately) may be required to fill the factory hole in the bed.

Features:

Quickly and easily install a 4-way trailer connector on your vehicle. This T-One typically plugs directly into the back of your factory-installed 7-way connector so you can retain the 7-way and also pull a trailer that has a 4-pole flat.

Installation Notes:

Exterior mounted plug on some or all models. May require an aftermarket electrical mounting box or bracket (sold separately)

For vehicles with factory tow package; may require additional components or may be used as a replacement harness

Features:

Install this socket in your truck bed for fast, easy hookup of a 5th-wheel or gooseneck trailer. Built-in magnet creates tight connection with an EZ Connector trailer-end plug (sold separately). Face-to-face contacts mean no bent or broken terminals.

Installation Notes:

This wiring is intended to be used with the 319-S7-10 trailer side plug, which is sold separately.

If your trailer has conventional 7-way wiring, this wiring harness is made compatible with an EZConnect Adapter, which is sold separately.

Features:

You're wiring up a new 7-way and the old socket's cracked and rusted. No point salvaging it. You bolt this one in, match the wires, and you're good to go. Solid connection, weather-resistant housing, and it holds tight through every haul.

Features:

Replace the existing 7-way on your vehicle with this socket. Built-in magnet creates tight connection with EZ Connector trailer-end plug (sold separately). Face-to-face contacts mean no bent or broken terminals.

Installation Notes:

For vehicles with factory tow package; may require additional components or may be used as a replacement harness

This wiring is intended to be used with the 319-R7-07 trailer side plug, which is sold separately.

If your trailer has conventional 7-way wiring, this wiring harness is made compatible with an EZConnect Adapter, which is sold separately.

Features:

Replace the existing 7-way on your vehicle with this socket. Built-in magnet creates tight connection with EZ Connector trailer-end plug (sold separately). Face-to-face contacts mean no bent or broken terminals. O-ring on lid makes a watertight seal.

Installation Notes:

For vehicles with factory tow package; may require additional components or may be used as a replacement harness

This wiring is intended to be used with the 319-S7-07 trailer side plug, which is sold separately.

If your trailer has conventional 7-way wiring, this wiring harness is made compatible with an EZConnect Adapter, which is sold separately.

Features:

Upgrade the 7-way connection on your vehicle and trailer with this complete kit. Built-in magnets create tight connection. O-rings make a watertight seal. Face-to-face contacts mean no bent or broken terminals. Includes plug holder and dummy plug.

Installation Notes:

For vehicles with factory tow package; may require additional components or may be used as a replacement harness

Features:

Quickly and easily install a 6-way and a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package wiring harness - no cutting, splicing or tapping required.

Installation Notes:

For vehicles with factory tow package; may require additional components or may be used as a replacement harness

Features:

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into OEM tow package wiring harness - no cutting or splicing required.

Installation Notes:

For vehicles with factory tow package; may require additional components or may be used as a replacement harness