TL*THE CONTACT OWNS A 1999 CHEVROLET TAHOE. WHILE DRIVING APPROXIMATELY 40 MPH ON NORMAL ROAD CONDITIONS, THE FRONT PASSENGER SIDE HEATED SEAT CONTROL MODULE WAS ACTIVATED WHILE AN OCCUPANT WAS SITTING IN THE SEAT. THERE WAS UNEXPECTED AND EXCESSIVE HEAT PENETRATING FROM THE SEAT, WHICH CAUSED THE OCCUPANT TO SUSTAIN SECOND DEGREE BURNS ON HIS RIGHT THIGH. THE HEATED SEAT MODULE HARNESS CONNECTOR WAS DISCONNECTED DUE TO THE MALFUNCTION. THE CONTACT IS IN THE PROCESS OF NOTIFYING THE MANUFACTURER. THE VEHICLE WILL BE TAKEN TO THE AUTHORIZED DEALER FOR DIAGNOSTIC TESTING. THE VIN WAS UNKNOWN. THE FAILURE AND CURRENT MILEAGES WERE 168,000.