Adapter For 6-Pin Round Socket On Vehicle And Trailer With 4-Flat

Updated 04/11/2025 | Published 04/09/2025

Products Featured in This Question

Pollak 6-Pole, Round Pin, Plastic Wiring Socket w/ Rubber Boot - Vehicle End

(222)

$24.40

Pollak 7 Pole to 4 Way Connector Adapter

(1061)

$7.78

Pollak 6 Pole to 4 Pole Connector Adapter

(77)

$12.65

Question:

My Chevy Silverado has a round 6 pin socket labeled DELPHI PA66 and I need the correct adapter to go to a flat 4 pin trailer plug. Thanks for your help, Willy

asked by: Willy

Expert Reply:

Hello Willy, thanks for reaching out. If what you have on your truck is a 6-pin round plug like part # # PK12720 (pictured below), you can use the adapter part # PK12717. This will plug in the 6-pin round plug and allow you to hook up the 4-flat plug on your trailer.

If the plug on your truck is actually a standard 7-way (also pictured below), what you will need is the adapter # PK12716.

Leave a reply below with any other questions or comments and I am happy to get back to you.

expert reply by: Jesse M

6-Pin Round Plug Example
(click to enlarge)

Standard 7-Way Example
(click to enlarge)

Willy

4/11/2025

My Silverado has a round 6 pin socket that has all 6 in a circle with no center, not 5 in the circle and one in the center. Thanks for your help, Willy

Jesse M.

4/11/2025

@Willy Not looking like we have an adapter for that. We would probably next look at replacing that plug on your Silverado with a standard 7-way or even a 7-way/4-flat combo. What year is your Silverado? Is it a 1500?