What 4 Flat Wiring do I Need for My 2012 GMC Acadia SLT?
Updated 09/08/2025 | Published 06/04/2025
Products Featured in This Question
Question:
I have a 2012 GMC Acadia. SLT looks like I have. Um, empty wiring harness under rear bumper on the passenger side. Actually a little farther in from the bumper, but Im not Im not sure if that would work for this. I also see its connected wiring harness by the rear tire. So Im just wondering whats gonna work best for me. As far as a harness, or if I need to lets fish the four flat
asked by: Ryan K
Expert Reply:
Hello Ryan,
It all depends on if your 2012 GMC Acadia came with the factory tow package or not. The Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # C55384 is for if the vehicle DID come with the factory tow package. If you looked under the vehicle and saw the correct connectors then the # C55384 should work great.
If your 2012 GMC Acadia did NOT come with the factory tow package then you will actually need the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118451, which is also a "plug-n-play" but requires a little more work to install as the connectors are plugged in through your rear tail lights.
I am very sorry I do not have a more direct answer for you, but it all depends on what package your 2012 GMC Acadia came with. If you are seeing the right connectors for the # C55384 I would purchase that one. Because I am recommending that wiring to you, if for some reason it did not work let me know and I will make sure you get a return label for a full refund.
What do you plan on using the wiring for? Hitch mounted accessory, or to tow a small trailer?
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- No Converter
- Factory Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Trailer Wiring Diagrams
- Article: How to Choose the Right Trailer Hitch Class
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Replacement Gooseneck Pin Box for a 2003 Keystone Cougar 5th Wheel Trailer
- Q&A: Parts Needed to Add Trailer Wiring to 2023 Toyota Tundra SR
- Q&A: Availability Of TorkLift SuperHitch For 2026 Ford F550 Cab And Chassis
- Q&A: Where Are The Safety Chain Loops On Stealth Hitches Hidden Hitch SH32TR?
- Q&A: Wiring Harness for 2016 Chevy Express 2500
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Q&A: Does Brandmotion FullVUE Digital Rear View Mirror with HD Backup Camera Come with CHMSL Camera
- Q&A: Is There a 4-Way Wiring Harness for a 2026 Chevy Equinox Activ?
- Article: How to Install a Brake Controller on Chevrolet / GMC 1999-2006 Pickups
- Article: Holiday 2025 | Best Gifts for Towers
Kate F.
9/8/2025
Hey Ryan, did you find out if your Acadia has the factory tow package and decide which wiring harness to go with? I'm curious about your choice because it could help others in a similar situation.