Recommended Wiring Harness For 2018 GMC Terrain Without Towing Package

Question:

Got the hitch and harness installed no problem. I was told I needed to install relays to make it work. I havent tried it without the relays, not sure i should, if it could damage anything. They are located at K1 and K3 in the rear fuse box is what i have found out from researching. I dont believe those are even there. I have no K1 or K3! Any help would be appreciated. I have a 2018 Terrian SLE, no tow package with the 1.5L Thank you.

asked by: Jon

Expert Reply:

If you do not have a towing package you will not have the locations for the relays in the fuse box that come with the Curt T-connector wiring harness part # C56375 or the Curt wiring harness part # C94FR because they are designed for the 2018 GMC Terrain with factory tow package.

expert reply by: Heather A