Wiring Adapter to Convert 7-Blade Flat Trailer Connection to 7-Pin Trailer Connection

Updated 07/07/2025 | Published 12/01/2017

Question:

I have an 05 silverado with a 7 pin flat witch have the brake/turn together and our trailers are 7 round but have the brake lights seperate from the turn signals. My question is The adapter that you have does it have a converter built into it that will split the brake and turn signals?

asked by: Nathan D

Expert Reply:

The Pollak Trailer Connector Adapter - 7-Blade Plug to 7-Pole Round Pin - Nylon # PK12727 does have the ability to separate out the functions so they operate correctly with your 7-pin trailer. The manufacturer has done the work so you can simply have a plug and play adapter between your 2005 Silverado and your commercial style 7-pin trailer wiring.

I've attached an article to assist with where the functions match up on each end of the adapter.

expert reply by: Jason S