2007 CHEVY SILVERADO 2500HD. SMELT BURNING PLASTIC FROM TIME TO TIME AND BLAMED IT ON OUTSIDE FUMES. AUGUST 2009 HEATER BLOWER FAN ONLY WORKED ON CERTAIN SETTINGS FOR A COUPLE OF DAYS AND FINALLY TOTALLY FAILED. LOOKED UP PROBLEM ON INTERNET AND FOUND THAT THE BLOWER RESISTOR HAD FAILED WHICH SEEMED TO BE A QUITE COMMON PROBLEM. I LOCATED THE PROBLEM MYSELF AND FOUND THE RESISTOR AND THE WIRING HARNESS HAD MELTED TOGETHER AND THE WIRES HAD MELTED THE PLASTIC OFF ABOUT 1 1/2" FROM THE HARNESS. FROM OTHER RESEARCH ON THE INTERNET I FOUND THAT ONE TRUCK ACTUALLY CAUGHT FIRE. I EXPLAINED TO CHEVY CUSTOMER SERVICE MY SAFETY CONCERNS AND MY DISGUST AS TO WHY THIS PROBLEM IS NOT A RECALL. I DON'T BELIEVE THAT THEY ARE INTERESTED IN RESOLVING THE PROBLEM. COULD YOU PLEASE LOOK INTO THE MATTER SOME MORE AND CALL ELECTRICALCONNECTION.COM FOR MORE INFO. THEY SELL THE REPLACEMENT PART IN A KIT FOR THE DIYER AND FROM WHAT THEY TELL ME IT IS A COMMON DEFECT WITH GM SINCE 1999 AND THEY SELL QUITE ALOT OF THEIR KITS TO PEOPLE WHO'S VEHICLES ARE OUT OF WARRANTY. *TR