Chevrolet Silverado Trailer Wiring | etrailer Trailer Wiring Harness Installation - 2013 Chevrolet Silverado. Speaker 1: Today on our 2013 Chevrolet Silverado, we're going to be installing Bargman's Fifth Wheel/Gooseneck 90-Degree Wiring Harness with the Seven-Pole Trailer Connector, part number 50-97-410 truck bed mounted trailer connector is going to be ideal for hooking up your gooseneck or fifth wheel trailer. Chevrolet Silverado 2500 HD Trailer Wiring Harness Advance Auto Parts has 6 different Trailer Wiring Harness for your vehicle, ready for shipping or in-store pick up. The best part is, our Chevrolet Silverado 2500 HD Trailer Wiring Harness products start from as little as $14. When it comes to your Chevrolet Silverado 2500 HD, you want parts and products from only trusted brands.