1. Custom Fit Vehicle Wiring
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FITS 1984 GMC Suburban
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 118311
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1984 GMC Suburban

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Tekonsha Custom Fit Custom Fit Vehicle Wiring - 118311
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Call etrailer.com at 800-298-8924 for expert service. We are your GMC custom fit vehicle wiring experts, and offer a lowest price guarantee. etrailer.com carries a complete line of Tekonsha products for your GMC Suburban 1984. T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part 118311 from Tekonsha can be ordered online at etrailer.com. Complete custom fit vehicle wiring installation instructions and technical support.
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1984 GMC Suburban - T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

  • Custom Fit
  • Trailer Hitch Wiring
  • Tekonsha
  • 4 Flat
  • No Converter

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


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points along frame rail
    • Plug in T-connector
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage: 7.5 amps per circuit
  • 1-Year limited warranty


Installation

T-One Connection Location Points

This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located beneath your vehicle, along the driver's-side frame rail.


Once installation is complete, the 4-way flat connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.


It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.



118311 Tow Ready T-1 T-Connector - 4 Wire

Installation Details 118311 Installation instructions

California residents: click here


Video of T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Tekonsha Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 118311 Review

Today we're going to be taking a look at a T1 Vehicle Wiring Harness with a 4-pole flat trailer connector. This product fits a 1973 to 1984 Chevrolet CK Series pickup, GMC CK Series pickup, Chevrolet and GMC Suburban, and Chevrolet Blazer, and GMC Jimmy. It's going to provide a 4-way flat connector at the back of the vehicle to power your trailer's signal lights. This is compatible with 5-pole, 6-pole, and 7-pole adapters, adapters are sold separately, and it's going to come with a dust cap for the 4-way flat plug that way you can cover up the connection points when your plug's not being used. The unit's going to connect quickly and easily, you do not have to worry about cutting or splicing any wires, all you have to do is locate your connection point along the frame rail and simply plug in your T connector. The plug on this connector is going to match up perfectly with the plugs on the vehicle, then you'll need to make a ground connection, that's going to be your white wire with the ring terminal attached to it. You want to get that grounded to a nice, clean metal surface using the included grounding screw. Once your install is complete, the 4-way connector's going to be stowed beneath the vehicle near the trailer hitch.

You can loop it around the safety chain loop or you can purchase a mounting bracket, mounting brackets are sold separately, but a bracket is recommended to keep the connector secure and easily accessible near the trailer hitch. It's also recommended that you use a small amount of dielectric grease on all your electrical connections like the plugs on the vehicle and the 4-pole connector itself, and that grease is going to help prevent corrosion to the connection points. That grease is sold separately, but if you need some you can find it right here at etrailer.com. The maximum amperage, the unit's rated for 7.5 amps per circuit and it's going to come with your detailed installation instructions to help walk you through the installation process step-by-step. That's going to do it for today's look at the T1 Vehicle Wiring Harness with the 4-pole flat trailer connector.


Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118311

Average Customer Rating:  4.8 out of 5 stars   (36 Customer Reviews)

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

- 118311
by:
1979 Chevy C10

Ive installed the trailer harness for my 1979 Chevy truck. 37715



- 118311
by:
GMC

Products fit my 1975 GMC C35 and worked great. Had to drill two holes in the frame. Same when I moved it to my 1986 k30 frame. 738412



- 118311
by:

I was looking at buying a generic version and then saw this made for my 1977 C10 Pickup; Easiest install for any wiring I have ever done!!! Thank you for having this!! 643427



- 118311
by:

It plug right into the truck wiring, didn't have any issues getting it installed. Good product with go price. 636229



- 118311
by:

Just what our ole 85’ truck needed to pull the new Jon boat 605585



- 118311
by:
Chevrolet Blazer

Plug & play. Took :02 to install and works perfect on my mid 70’s Chevy blazer. 603858



- 118311
by:

This product was exactly the right part. I could just plug and play. It made life easier then splicing it in. Service was fast I will buy more from etrailer. 520708



- 118311
by:
1977 Chevrolet C/K Series Pickup

Appears to be of good quality. Very fast shipping 473150



- 118311
by:

About time this type of wiring harness has evolved, great product. 443653



- 118311
by:
1981 Chevrolet C/K Series Pickup

No parts stores in town had what I needed, so I got online and found etrailer. They had exactly what I needed, in stock and shipped the next day. I will definitely buy here again. 435674



- 118311
by:
1977 Chevrolet C/K Series Pickup

this product worked great and easy to install . did exactly what it said , a must buy if you have a older truck like mine 1977 chevy 3/4 ton (thanks etrailer!! ) 417500



- 118311
by:

Great product, lightening fast shipping, packaged good. Install was about 10 minutes, product works perfect, and about 1/3rd the cost of everywhere else. Thanks etrailer, will buy from again. 410342



- 118311
by:
1980 Chevrolet C/K Series Pickup

Exactly what I needed customer service was great and got here b4 I expected 5 out of 5 stars 370180



- 118311
by:
1973 Chevrolet C/K Series Pickup

Fit perfect and works great! 351906



- 118311
by:

the item arrived ahead of projected delivery date,,,, fits and works perfect on my 1976 c-10 short bed step-side truck, saves having to cut and splice in to the wiring system looking forward to getting more items ,,for this project,, thanks 348931



- 118311
by:

I am happy with the product, the delivery time,and the price. It was easy to install and works fine. 296053



- 118311
by:
1983 Chevrolet C/K Series Pickup

The wiring harness was exactly what I needed. The service from etrailer.com was fast and reliable. I would definitely recommend them to a friend. 267761



- 118311
by:
1981 GMC C/K Series Pickup

This product worked EXACTLY as it should. Easily plugged into connectors and worked perfectly. I used LARGE tie straps to hold all connections together just to be sure they don't pull apart, as my truck is used for off-roading as well. 265822



- 118311
by:
1975 Chevrolet C/K Series Pickup

great product 257508



- 118311
by:

Super easy install, but the female end of your inline adapter didn't fit as well as the original factory. I didn't have a working turn signal on my pick up after the install. I wiggled the adapter and the turn signal started working. I pushed it in as hard as I could and taped it in place. All is well for now, but you may want to tweak the fit of your adapter. I also purchased a 4 pin to 7 pin adapter. It worked great. 238401



- 118311
by:
1984 Chevrolet C/K Series Pickup

Worked great. Has a rubber housing so it seals to the truck harness well. Would buy one again. Fast shipping too. 222964



- 118311
by:
1970 Chevrolet Blazer

Bought this for my 1970 Chevy Blazer. Fit Perfect, decent quality, only time will tell the durability. 221497


Comments
Works perfect on my 1970 Chevy Blazer.
Frank - 08/23/2016

20470

- 118311
by:

great price and product e trailer rocks 217983



- 118311
by:
1976 Chevrolet C/K Series Pickup

Good product. Easy to install. Good price. Fast shipping 201729



- 118311
by:
1979 GMC C/K Series Pickup

Found the item that I needed very easily on the web site. It appears to be very well manufactured. It arrived 2 days earlier than expected. I would recommend etrailer.com for all your trailer needs. 199995


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Show More Reviews

Ask the Experts about this Tekonsha Custom Fit Vehicle Wiring

  • Trailer Wiring and Brake Controller for a 1983 Chevy C10
    First, you will need a 4-way connection. The purpose of this connection is to operate your stop, turns, and tail lights of your trailer. The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118311 will quickly and easily allow an install of a 4-way trailer connector on your Chevrolet C/K Series Pickup with this custom wiring harness. T-One connector plugs directly into existing wiring no cutting, splicing or tapping required. In order to control your trailer with electric...
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  • Where is the Trailer Wiring Connection Point on a 1981 Chevy CK Series Pickup
    The vehicle tail light wiring harness is located along the inside of the left rear frame rail. The harness will have a connection point with connectors matching the ends of the T-connector, # 118311, that you referenced. I added a photo of this location on a newer model Chevy, the connector is different but the location is the same.
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  • Factory Connection Point for Trailer Wiring on a 1984 Chevy Blazer
    As far as I could find the connection point on the 1984 Chevy Blazer is located along the driver side frame rail near the back of the vehicle (see instructions link). You may be able to pull it down from in front of the gas tank or up and over the frame rail. Otherwise, the way that you have described it, sounds like you would have to lower the gas tank to reach the factory connection point.
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  • Wiring Harness Recommendation For 1974 Checrolet C-10 Pickup Truck
    We do offer a trailer wiring harness that is designed to fit your 1974 Chevrolet C-10 Pickup truck. You will need to first install a 4-way harness and then a 7-way to use the brake controller. The wiring harness I recommend is the Tow Ready T-One Vehicle Wiring Harness, part # 118311. You simply locate the connection point along the truck frame rail and plug in the connector, attach the ground to clean bare metal and you will have a 4-way harness at the rear of your truck. Since...
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  • 4-Way Trailer Wiring Harness Recommendation for 1984 Chevy C10
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  • Recommended Trailer Hitch For 1978 Chevrolet C10 Pickup Truck
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  • Trailer Hitch and Wiring Harness Recommendation for 1978 Chevrolet K20 Pickup with Step Bumper
    For your 1978 Chevrolet K Series with step bumper, I recommend the B&W Heavy Duty Trailer Hitch Receiver # BWHDRH25198. This trailer hitch is designed to fit the 1978 C/K Series Pickup with an 8 foot bed with a deep drop bumper. This trailer hitch will meet the weight capacity needs you referenced, offering 1,600 pounds tongue weight and 16,000 pound towing capacities. This hitch has a powder coat finish to help resist rust and has safety chain loops built in. I have attached a...
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  • How Does B&W Trailer Hitch Mount to a 1975 Chevy 1-Ton Dually Pickup Truck
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  • Replacement 7-Way Trailer Harness and Brake Controller Installation Kit for 1979 Chevrolet Blazer
    You can use 7-way trailer-side plug # 50-67-106 to re-wire your tandem boat trailer but you may prefer the protection and convenience of using a junction box like Epicord 7-Way # 277-000141 or our own kit # ET7WK, which even includes ring terminal connectors and wire loom for making secure long-lasting splices to your existing trailer wiring. I suggest this kit as it includes all of these additional parts and actually costs LESS than part # 50-67-106. For a trailer brake controller it...
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  • Installing Brake Controller in 1982 Chevy K10 Blazer
    To install a brake controller on your 1982 Blazer, you will need our Brake Controller Installation Kit, part # ETBC7, which includes everything needed to install a brake controller if your Blazer has a functioning 4-pole trailer connector. If you do not already have a 4-pole trailer connector in place, one can easily be installed using a Tow Ready T- One Connector, part # 118311. I do not have any vehicle-specific installation instructions for your particular vehicle, but I have linked...
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  • Trailer Hitch and Wiring for a 1977 Chevy Blazer 2-Wheel Drive
    Curt trailer hitch # C13401 will fit your 1977 Chevy Blazer. I also checked the installation instructions, linked for reference, and it does not exclude 2-wheel drive or 4-wheel drive models so you are good to go! If you plan on doing some towing I recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and a storage...
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  • Recommended Trailer Brake Controller for Use in 1984 Chevrolet K20 Pickup
    To install a trailer brake controller in your 1984 Chevrolet K20 Pickup you will need the brake controller itself, such as the excellent Tekonsha Primus IQ # TK90160 that you referenced, as well as a brake controller installation kit # ETBC7. If your truck does not already have a working 4-pole flat trailer connector you will also need one those, part # 118311. Your installation will be a hard-wire type since there is no quick-connect port under the dash. At right you will find links...
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  • Trailer Hitch Installation Instructions for a 1975 Chevy Blazer
    We have not yet had the opportunity to install the Draw-Tite hitch # 75129 on a vehicle so I do not have a picture. But I do have the instructions that shows where on the frame the hitch installs. I have included a link to the installation instructions for you. If you plan on doing some towing, I recommend the etrailer Ball Mount Kit, # 989900. It comes with 2 ball mounts, 2 balls, a hitch pin with clip, and a carrying bag. For trailer wiring use T-One Vehicle Wiring Harness, # 118311....
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  • Trailer Hitch for a 1979 Chevy C-10 with Trailering Special Package
    Actually several of your pictures did make it through! What you have there is the standard/step bumper on your 1979 Chevy C-10. Deep drop bumpers, also called cowboy bumpers, drop way down. If your truck has an 8 foot bed you can use Curt trailer hitch # C14082. If you have a 6 foot bed you would need hitch # 75034 and 6 of spacer block # 01077-011 to complete the installation. If you go with the Curt hitch then I also recommend etrailer ball mount kit # EBMK2416. It comes with a...
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  • Parts Needed to Install a Trailer Brake Controller on a 1978 Chevy C/K Series Scottsdale
    First, you will need to install a 4-Way trailer connector, # 118311. I have included a link to the instructions for you. Next, you will need a 4 and 7 way installation kit, # ETBC7. This will provide the 7-Way and the wiring to install the brake controller. I have included some links that will help with the ETBC7 installation. You will also need a second cradle and mounting bracket for the second vehicle, # TK5906. And you will need another wiring harness for the second vehicle. Depending...
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  • Compatibility of Parts to Install Brake Controller in 1979 Chevy Blazer
    I can certainly help you out ensuring you have all the correct parts to install a brake controller. Since you decided on the Curt TriFlex # C51140, and don't have a harness port in your '79 Blazer, you are correct that you'd need adapter # C51515. It will also be necessary to add the wiring, which comes with the # ETBC7, and along with that you'll need a 4-way, and # 118311 is a confirmed fit for your Blazer and will work with the ETBC7. Finally, the 7-Way Connector # 50-67-106 is going...
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  • Parts Needed for Towing with a 1983 Chevrolet C20 Pickup
    The Curt Curt Trailer Hitch Receiver # C13099 that you referenced will fit your 1983 Chevrolet C20 if it has an 8 foot bed and came with a deep drop bumper. This trailer hitch is rated for 5,000 lbs Gross Towing Weight (GTW) and 500 lbs Tongue Weight (TW). When used with a Weight Distribution (WD) system those capacities are increased to 5,500 lbs GTW and 550 lbs TW. If you have an 8 foot bed with the standard or step bumper then you will want to go with the Curt # C14082 instead. This...
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  • What Trailer Hitch Will Fit My 1977 Chevrolet Pickup
    We do have a trailer hitch that will work with your 1977 Chevrolet Pickup although I doubt the one off the 1985 Suburban will work. We do not carry any hitches for the Suburban that are also compatible with the pickup. Which is a very good indication that the hitch will not be a match. An option for your pickup is the Draw-Tite Max-E-Loader Class III # 41504. It is made to fit with the heavy duty suspension of your truck. Additionally, you may be interested in the Ball Mount #...
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  • Trailer Hitch Recommendation for a 1978 Chevy K20 * Foot Bed with Standard Bumper
    Draw-Tite trailer hitch # 41938 will fit your 1978 Chevy K20 if it has the standard factory bumper and it the distance from the end of the frame to the leaf spring shackle bracket is 19 inches or more so since yours are at 14 and 18-1/2 this hitch will not fit. You can instead use Ultra Frame Trailer Hitch Receiver - Custom Fit - Class V - 2" Item # 41947. I have linked the installation instructions for you. I also recommend etrailer.com Ball Mount Kit - 3" Rise or 4" Drop - 16,000 lbs...
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  • Class V Trailer Hitch Recommendation For 1973 Chevrolet C/K Pickup
    The B&W Heavy-Duty Trailer Hitch Receiver, part # BWHDRH25122, is verified to be a fit if your 1973 Chevrolet C/K Pickup has an 8 foot bed and a standard bumper. This hitch is a Class V hitch and has a 2 inch receiver opening. We have not received any feedback from customers about the hitch not fitting. For a ball mount I recommend part # BWBMHD30010. This mount features a 1 inch rise and 2 inch drop and measures 8-1/2 inches from the center of the hitch pin hole to the center of the...
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  • Brake Controller Installation on 1979 GMC Jimmy
    A brake controller like the Tekonsha PowerTrac # 39523 you mentioned is not a vehicle specific item. A brake controller can be installed in just about any vehicle. You would need a brake controller installation kit, part # ETBC7 if you needed a 7-way trailer connector or # ETBC6 for a 6-way connector. The install kits include everything necessary to install a brake controller, including the 7 or 6-way trailer connector that is designed to adapt an existing 4-pole trailer connector....
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  • Will Spare Tire Interfere with Trailer Hitch Installation on a 1978 GMC C/K Series Pickup Truck
    The Curt trailer hitch # C14082 is designed to attach to the bottom of a 34 inch wide frame on a cab and chassis model 1978 Chevy C/K series pickup. If the spare tire fits between the frame rails then it will not be a problem, otherwise it would need to be relocated or the mount modified. If you do not have a cab and chassis model truck this hitch will not fit. I have linked the instructions for you to view. I have also linked the other hitches for your truck in case you do not have...
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  • Will the Draw-Tite Hitch # 75034 Work on a 1978 Chevy C-10
    The only modifications you will need to make on your 1978 Chevy C-10 2WD to install this Draw-Tite Max-Frame Trailer Hitch # 75034 will be that you will need to drill a few holes and relocate the spare tire mount. I attached installation instructions for you to check out for this product. You may also be interested in purchasing the following products to complete your tow setup: T-One Vehicle Wiring Harness with 4 Pole Trailer Connector # 118311 (instructions attached) Ball Mount...
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Info for this part was:

Expert Research:
Michael H
Expert Research:
Jameson C
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Alexander C
Updated by:
Isabelle B
Installed by:
Cole B

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