WHILE DRIVING ON A CITY STREET I SMELLED SOMETHING BURNING I HEARD A SIZZLING SOUND AND LOOKED IN THE BACK AND SMOKE WAS ROLLING FROM BEHIND MY PASSENGER BACK SEAT. I REALIZED IT WAS COMING FROM THE WIRE CONNECTION FOR REAR DEFROSTER. THE SMOKE STOPPED AFTER ABOUT 10 SECONDS SO I CONTINUED DOWN THE ROAD AND AFTER ABOUT 30 SECONDS A LOAD BOOM OCCURRED AND THE PASSENGER REAR SECTION OF MY ELECTRIC SLIDING WINDOW WITH DEFROST EXPLODED. I TOOK IT TO THE DEALER AND THEY SAID IT WASN'T COVERED BY WARRANTY OR RECALL. THIS IS BEING RECALLED IN CANADA ON THE SAME TRUCKS BUT NOT U.S. TRUCKS.