Description Uses OEM sealed connector assemblies that plug into the existing vehicle harness Retains use of the factory US car 7-way at the rear of the vehicle Must look at your harness on your truck to see if it has rectangle plug, or the circular plug to retain use of the factory 7-way at the rear of your vehicle. 1999-2011 Ford & 1999-2011 Chevy should have the circular harness. 1995-2009 Dodge should have the rectangular harness. 2010-2011 Dodge should have the circular harness. If you have a circular plug then the 56000 is the 10′ extension harness, and 56070 is the 7′ extension harness. If you have a rectangular plug then 56001 is the 10′ extension harness, and 56071 is the 7′ extension harness.
