Plug and Play Trailer Wiring for 1977 C-10 Silverado

Updated 09/08/2026 | Published 09/03/2026

Question:

Will part number C55312 fit as a plug and play for my 1977 C-10 Silverado ? If not do you make one that will fit. I don’t want to splice the wires.

asked by: Paul

Expert Reply:

Thanks for reaching out Paul. The Curt T-Connector Vehicle Wiring Harness # C55312 will not fit your 1977 Chevy C-10 Silverado. This harness is designed for later C/K Series pickups, beginning with the 1985 model year. Unfortunately, we don't currently carry a plug and play trailer wiring harness for your 1977 C-10.

I did some additional digging and found that Curt offered a plug and play harness for your truck with part number 55311. If you're able to locate that harness through another supplier, it will give you the no-splice installation you're looking for.

What are you planning on towing with your C10?

expert reply by: Christopher H