You are looking at a special trailer plug adapter I sell which will allow you to pull a trailer with the 7 way blade plug, even though your truck has the 6 way round plug commonly found on some tow vehicles
This plug consist of a female 7 way blade connector that the trailer plug can plug into, and 6 way round plug to plug into the back of your tow vehicle.
Again, the 6 way round end fits your truck, and the 7 way blade end fits the trailer.
||Usual Trailer Wire|
|White Wire||Ground||White Wire|
|Red Wire||Left Turn and Brake||Yellow Wire|
|Brown Wire||Right Turn and Brake||Green Wire|
|Green Wire||Tail Lights||Brown Wire|
|Blue Wire||Brake Power||Blue Wire|
|Black Wire||12 volt (hot lead)||Black Wire|