2021 GMC Terrain Trailer Wiring

Name: T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
Brand: Tekonsha
SKU: 118285
Price: 21.42 USD
Availability: InStock
Rating: 4.83597883597884 (189 reviews)

Expert Review Video:

Best 2021 GMC Terrain Custom Fit Vehicle Wiring Harness Options

Filter Results

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
with factory Tow package

Shown on 2021 GMC Terrain

189 reviews

Code: 118285

Retail:$57.10

Our Price: $21.42

You Save: 62%

In Stock

Custom Fit Vehicle Wiring Specs:

Trailer Hitch Wiring
Powered Converter
Custom Fit
4 Flat

Plug-In Location:

Under vehicle, driver side

Features:

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

Installation Notes:

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

Tech Tip:

Product contains relays needed to activate the tow package.

More Information >

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
with factory Tow package

Shown on 2024 GMC Terrain

124 reviews

Code: C94FR

Retail:$72.27

Our Price: $37.29

You Save: 48%

In Stock

Custom Fit Vehicle Wiring Specs:

Trailer Hitch Wiring
No Converter
Custom Fit
4 Flat

Plug-In Location:

Under vehicle, center

Features:

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

More Information >

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
with factory Tow package

Shown on 2024 GMC Terrain

Code: TK67KR

Retail:$112.03

Our Price: $95.48

You Save: 15%

In Stock

Custom Fit Vehicle Wiring Specs:

Trailer Hitch Wiring
Powered Converter
Custom Fit
4 Flat

Plug-In Location:

Under vehicle, driver side

Features:

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

Installation Notes:

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

Tech Tip:

Product contains relays needed to activate the tow package.

More Information >

Explore Expert Info

on Custom Fit Vehicle Wiring

Videos

for Custom Fit Vehicle Wiring

Help Articles

for Custom Fit Vehicle Wiring

Expert Answers

for Custom Fit Vehicle Wiring

Choosing the Right Trailer Wiring

Choosing the Right Brake Controller

Curt 4-Pole Flat Trailer Connector Mounting Bracket Review

Curt Powered Tail Light Converter Installation - 2023 Kia Telluride

Curt T-Connector Vehicle Wiring Harness Installation - 2023 Kia Sportage

Brophy Mounting Bracket for 4-Pole Flat Trailer Connector Review

Curt T-Connector Vehicle Wiring Harness Review C56040

Hopkins 7- and 4-Pole Trailer Connector Socket Review

Curt Powered Tail Light Converter Installation - 2022 Toyota Sienna

Curt T-Connector Vehicle Wiring Harness Installation - 2023 Toyota RAV4

Curt T-Connector Vehicle Wiring Harness Installation - 2024 Honda Pilot

Review of etrailer - Brake Controller - ETBC7

Brake Controller 7- and 4-Way Installation Kit (ETBC7)

How to Choose the Right Trailer Hitch Class

Trailer Wiring Diagrams

My Trailer Hitch…

Wiring Trailer Lights with a 7-Way Plug…

How to Measure for Trailer Hitch Drop

Brake Controller Installation: Starting from Scratch

Wiring Trailer Lights with a 4-Way Plug…

Routing the Power Wire for a Trailer Wiring Harness

Rooftop Cargo Carriers

Ball Mount Basics: Weight Capacity, Class, and Size

Towing a Trailer?…

What is the Difference Between a Class II and a Class III Hitch?

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

view full answer...

What is the Difference Between a 4-Way and 7-Way Trailer Connector

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

view full answer...

What Is An OEM Prep Package And How Do I Know If I Have It

The OEM prep package consists of 4…

view full answer...

Availability Of Trailer Wiring Harness For A 2024 Toyota Grand Highlander

As far as wiring for the 2024 Toyota Grand Highlander, we do have the Curt #C59236 available which is more of a universal hardwire harness. Unfortunately there are not any plug-and-play options that have been confirmed to fit as of yet (October 4,…

view full answer...

Yes, we do. To add a hitch to your 2024 Toyota Grand Highlander, I recommend the Curt Trailer Hitch item #C26VV. This hitch is custom fit and bolts to your Toyota with included hardware. This is a class III hitch with a…

view full answer...

Does Truck with 6-1/2 ft bed Have to Use Slider Hitch for Turning Clearance with Fifth Wheel Hitch

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length…

view full answer...

My Vehicle has a 4-Pin Trailer Plug, but Trailer has 7-Pin Trailer Plug

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your…

view full answer...

What Hitch Do You Recommend for a 2024 Toyota RAV4?

To add a hitch to your 2024 Toyota RAV4, I recommend the etrailer item #e23ZR. This hitch is custom fit and bolts to your Toyota with included hardware. This is a class III hitch with a…

view full answer...

Difference Between Curt…

Yep, so long as your 2024 Subaru Crosstrek Wilderness is not a hybrid both the Curt and etrailer hitches will fit: - Curt Trailer Hitch Receiver #C13382 - etrailer Trailer Hitch Receiver #e98912 The only difference besides price is the finish; the…

view full answer...

How to Tell if 2019 Toyota Highlander Has Factory Tow Package

For some reason Toyota…

view full answer...

Parts Needed to Tow Trailer With Brakes Using 1992 Dodge D250

The first thing you will need for your 1999 D250 is a 4-way. The Curt T-Connector Vehicle Wiring Harness #C55317 plugs into the connection points behind your rear bumper and will allow you to power your…

view full answer...

Trailer Hitch Receiver…

We have both a trailer hitch receiver as well as the wiring you need for your 2024 Hyundai Palisade. I verified both fits directly with the manufacturer for you, and the correct parts are the following: - Curt Trailer Hitch Receiver #C13427 -…

view full answer...