Trailer Wiring Harness that Fits 2025 GMC Terrain Elevation

Question

Question:

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Part Number: 118795 This product DOES fit the 2025 gmc terrain elevation addition. You’ve sent me 3 harnesses now that have been incorrect The gmc terrain elevation 2025 has a OEM port with 4 pins marked not compatible on your site not 6 pins marked compatible

asked by: Zachary P

0

Expert Reply:

Hey Zachary, thanks for passing that along! I sent an update to our fit team to have the Tekonsha trailer wiring harness part # 118795 added as a fit for your 25 Terrain.

expert reply by: Jameson C

0

Jameson C.

9/12/2025

Hey Zachary, did the T-One wiring harness work out for your 2025 Terrain after the update? I’d love to hear your outcome because it could give others confidence when ordering replacements.

Zachary P.

9/12/2025

@JamesonC yes and no. Turns out for ANY harness to work, if it’s factory wiring and you want to use the OEM plug and your vehicle didn’t come with a hitch from the factory you must go to the service department at the dealership to have them turn on the tow package wiring. NO harness will work until they turn it on!

Jameson C.

9/15/2025

@ZacharyP Good to know!

Answer 1

Hi Bob! We don't have the OEM hitches so I recommend heading back to GM's website or your local GM dealership and checking with their service department. The only hitches we have for your 2024 GMC Terrain are ones like the Draw-Tite item…

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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

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 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 6

Hey Ricardo! Yes, the Curt Trailer Hitch Receiver #C82RJ is the hitch Curt is working on for the new 2027 Telluride. This is a pre-order since Curt hasn't finished the design. It does not include wiring. The wiring harness for the 2027 is also up…

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Answer 7

The main difference between the Curt Trailer Hitch Receiver part #C13416 and the EcoHitch Hidden Trailer Hitch Receiver part #EH97FR is that the EcoHitch has a completely hidden cross tube whereas the Curt cross tube will be visible from the rear of…

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Answer 8

Hi David! There are quite a few hitches offered for your 2026 Honda Odyssey, so I definitely understand wanting to know the differences. There are basically three styles available for you and I have them broken out below: Exposed Crosstube: etrailer…

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Answer 9

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 OEM 5th…

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Answer 10

Hi Paul, you’re definitely on the right track here, and I can help you narrow this down with confidence. With your tandem 3,500 lb Dexter axles and 33 inch spacing, both the Dexter EZ Flex part #K71-652-00 and the Lippert Road Armor part #LC53CK are…

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Answer 11

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 12

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Trailer Wiring Harness that Fits 2025 GMC Terrain Elevation

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