Shop Nilight 4 Pin Trailer Wiring Harness 55359 Vehicle Side Custom for 1998 1999 2000 2001 2002 2003 2004 Chevrolet S10 GMC Sonoma Isuzu Hombre Trailer Light Harness Tow Hitch Wiring 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.