TL* THE CONTACT OWNS A 2005 CHEVROLET TAHOE. THE CONTACT STATED THAT THE FRONT DRIVER'S SIDE HEATED SEAT WAS ACTIVATED WHEN IT SHORT CIRCUITED AND CAUSED A SMALL SPARK TO IGNITE UNDER THE SEAT. THERE WERE NO VISIBLE FLAMES AND THE CONTACT WAS NOT INJURED.THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE PROBLEM. THE APPROXIMATE FAILURE MILEAGE WAS 113,000.