TL*THE CONTACT OWNS A 2000 CHEVROLET IMPALA. WHILE DRIVING 60 MPH, THE CONTACT NOTICED THAT THE SEATS WERE BECOMING HOTTER THAN NORMAL. SHE DEACTIVATED THE SEAT HEATER; HOWEVER, THE SEAT CONTINUED TO HEAT. SHE SMELLED SOMETHING BURNING AND NOTICED SMOKE AND A WHOLE IN THE SEAT. AS OF DECEMBER 14, 2007, THE DEALER HAD NOT INSPECTED THE VEHICLE. THE VIN WAS UNKNOWN. THE CURRENT AND FAILURE MILEAGES WERE 160,900.