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Difference Between Curt Wiring Harnesses for a 2018 GMC Terrain  

Updated 05/02/2024 | Published 05/01/2024



Question:

hello I have a 2018 GMC terrain SLE 1.5 gas. I see two trailer harness listed for this. Can someone please tell me the difference between part number 56429 and 56375?

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Expert Reply:

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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Jon G
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