Shop Nilight 4 Pin Trailer Wiring Harness Kit 56094 Vehicle Side Custom for 2010 2011 2012 2013 2014 2015 2016 2017 Chevy Equinox GMC Terrain Trailer Light Harness w/o Factory Tow Package in high quality. No cutting or splicing factory wire. Plug and play harness. This trailer wiring harness kit plugs into existing factory wiring on your vehicle and equips it with a standard, rear 4-pin trailer wiring connector for plugging in and towing a trailer.