Expert Answers about GMC Terrain

• Difference Between Curt Wiring Harnesses for a 2018 GMC Terrain
• Hey Harold, thanks for reaching out! The difference between the Curt Wiring Harnesses for your 2018 GMC Terrain is that the part # C56375 comes with relays that you install in your vehicle fuse/relay box while the part # C94FR (56429) has plugs integrated into the wiring for those relays. They install using the same plug and they give you the same functions so it just depends on where you'd rather install the relays at.
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• Recommended Trailer Wire Harness For A 2020 GMC Terrain
• Hey Mark, If your Terrain has a plug like the one pictured below then you should have the tow package and be able to use the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C94FR. This harness has relays to plug into itself to activate the factory tow package and transfer the light signals to through the trailer connector. If the harness you're describing is different then it likely isn't for the tow package and you'll need to go with the Tekonsha Powered...
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• Recommended T-Connector For A 2024 GMC Terrain
• Hey Don, we do have a T-connector for your 2024 GMC Terrain. I recommend the Curt T-Connector # C94FR. This will also include the relays needed to activate the tow package on your Terrain. I have linked an install video for your below.
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• There are Extra Wiring At The Trailer Hitch Receiver On a 2016 GMC Terrain
• The wiring you have on your 2016 GMC Terrain looks like it was added for a hitch light or possibly some kind of backup camera. It could have also been for a lift type bike rack or cargo carrier to get power. The white/brown wire of the one connector is typical of providing power for a hitch light which comes on with just the running lights. You can try using a Test Light # PTW2993 to see when the pins have power and possibly trace the wiring into your Terrain to see where exactly it runs to.
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• Recommended Trailer Hitch Receiver for Towing With 2023 GMC Terrain
• I recommend the etrailer # e59ZR for your 2023 GMC Terrain. This is a custom fit Class III hitch with a 2" receiver. What sets it apart from other options is the matte black powder coat finish. This gives it more of an OEM look and does a better job hiding dirt and scratches when compared to a glossy finish. Since you will be towing you will also need wiring. If you have the factory tow package you need the # 118285 and if you don't have the tow package you can use the # C59496. Both will...
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