The contact owns a 2009 Chevrolet Silverado 2500. The contact stated while driving 30 mph, when an unknown warning light was illuminated. The contact called an independent mechanic who informed the wiring harness was melted and needed to be replaced. The vehicle was not diagnosed or repaired. A dealer was not contacted. Upon investigation, the contact associated the failure with NHTSA Campaign Number: 14V407000 (Electrical System), however, the VIN was not included. The manufacturer had been informed of the failure. The failure mileage was approximately 195,000.