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 1500 Trailer Wire Harness and Order Chevrolet Silverado 1500 Trailer Wire Harness and Connector online today. Free Same Day Store Pickup. Check out free battery charging and engine diagnostic testing while you are in store.