Recommended Parts to Add a 7-Way Connector to a 2019 Chevy Express 2500 Van

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Question:

I have a 2019 Chevy 2500 Express van. I need a 7 pin wire harness connector/adapter. I do not have anything right now. There seems to be 1 plugged off electrical adapter underneath next to the rear bumper. The 4pin/7pin optional adapter is fine. Im not seeing alot of options.

asked by: Michael S

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Expert Reply:

Unfortunately that 12 pin rectangular plug has nothing to do with the trailer wiring harness and people ask about it all the time. To add a 7-way connector to your 2019 Chevy Express 2500 van you're going to need to buy two separate harnesses. The reason for this is that the van's with the towing package came from the factory with the 7-way connectors like item # HM40975. The other ones have nothing and no one makes a custom fit 7-way that just plugs in.

The first connector you will need is the Curt Wiring Harness item # 55540. This custom fit connector plugs into existing wiring in your rear cargo area which is located behind the interior trim panels in your rear cargo area. This will provide you with a 4-flat connector.

The second harness you will need is the Universal Installation Kit item # ETBC7. The kit includes a pre-wired 7- and 4-way trailer connector that mounts easily at the rear of your vehicle with an included bracket. This kit is designed for use on a vehicle with an existing 4-way flat trailer connector and plugs directly into it.

You will then connect the blue wire to the blue wire on the brake controller, connect the black wire to the positive post on the vehicle's battery, the white wire to ground, and the yellow wire to vehicle's reverse circuit if applicable. This will provide you with the ability to control your trailer's brakes and also provide you with a 12v power wire for you trailer's accessory lights.

I have linked a couple of installation videos below to help you get these parts set up.

Some other parts you will need to tow a trailer with brakes are listed here:

Trailer Hitch - etrailer Hitch item # e98861

Brake Controller - Redarc Tow-Pro Liberty Brake Controller item # RED24FR and Harness item # RED69FR

Wiring Harness Mount - No-Drill Mount Bracket item # 18136

Ball Mount - Rapid Hitch Adjustable, Aluminum Ball Mount Kit w/ 2 Greaseless Balls item # AM3461

Locking Pin - etrailer Hitch Receiver Lock for 2" and 2-1/2" Hitches item # e98881

expert reply by: Jerred H

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Answer 1

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…

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Answer 2

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…

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Answer 3

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion…

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Answer 4

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 2" receiver. It has…

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Answer 5

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 brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only…

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Answer 6

Hey Antoine, so the two kits you mentioned are actually really similar and honestly I would go with the part #ETBC7 if I were you. The #ETBC7L is basically the same thing minus a couple wires and breakers so you may as well get the kit that has…

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Answer 7

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 trailer's signal lights. Once the 4-way is…

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Answer 8

I do have a solution for your 2024 Kia Telluride that has the LED taillights that does allow it to have both a 4-way and 7-way plus install a brake controller but it is not with the #TK74CR which does not work for you based on the LED taillights.…

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Answer 9

For some reason Toyota isn't very forthcoming with how to figure out if you have the tow package or not. From my understanding all of the V6 models of the 2019 Toyota Highlander have the tow package but it isn't specified as to what else…

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Answer 10

If you have a vehicle specific wiring harness for a brake controller then that would indicate that you have a factory tow package and subsequently would already have a 7-way at the back of your vehicle. The universal 7-way connector #ETBC7 is meant…

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Answer 11

Thank you for all of the information and pictures! It looks like you should at least have some wiring already run on your 2019 Chevy Express Van 3500 so I'm just as confused as to why you don't have a round plug with a cap inside the…

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Answer 12

Sure thing, I will go ahead and list out what you need for your 2023 Kia Sportage to add a 7-way for a brake controller so you can tow with the Curt Trailer Hitch Receiver #C94WR: - T-Connector Vehicle Wiring Harness with 4-Way Flat Trailer Connector…

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Recommended Parts to Add a 7-Way Connector to a 2019 Chevy Express 2500 Van

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