PE90056, POWER SEAT WAS A LITTLE LOOSE AND CAUSED IT TO CUT THE WIRES. THEN SMALL FIRE UNDER THE SEAT BROKE OUT. AFTER WIRES MELTED FIRE EXTINGUISHED BY ITSELF. DEALER'S SERVICE MANAGER REPORTED PROBLEM AND DIRECTED CONSUMER TO CALL GMC. GMC INDICATED THEY WOULD ACT ACCORDING TO WHAT THE SERVICE MANAGER REPORTED. SERVICE MANGER REPORTED "NOT MUCH OF A FIRE CAUSED BY NORMAL WEAR AND TEAR". SEAT APPEARED TO BE LOOSE. *AK