Product Details:This Fog light harness Fits for 2007-2014 Chevy Silverado. (Does not fit for new body style 2014 Silverado 1500). Use on models that are not equipped with factory fog lights, the fuse box already contains the fuse and relay needed for installation. So we have no reason to go with an aftermarket switch and wiring harness that contains a relay. Simply replace your original switch with one that has the fog light switch (You can search D1527J or 25858705 to buy a switch, about $40).Those will allow your fog lights to work exactly the same as if the vehicle was factory equipped.Fitment:For 2007-2013 Chevrolet Silverado 1500For2007-2014 Chevrolet Silverado 2500 HDFor2007-2014 Chevrolet Silverado 3500 HDPackage Included:1 x Fog Light Harness as Pictures10 x Black zip Ties as Pictures