I DROVE TO WORK & PARKED MY 2007 AVALANCHE IN MY EMPLOYERS TRUCK GARAGE AS I DO EVERY DAY. I WENT INTO THE OFFICE ATTENDED A JOB BRIEFING & WE PUT ON OUR COVERALLS FOR WORK THEN WE GOT READY TO LEAVE TO GO TO THE 1ST JOBSITE BUT AS SOON AS THE 1ST TWO COWORKERS WALKED OUT OF THE SHOP THEY TURNED AROUND YELLING THAT MY TRUCK WAS ON FIRE. I DIDN'T BELIEVE THEM AT 1ST BECAUSE I HAD JUST PARKED LIKE 15 MINUTES PRIOR. PARKED & NOT RUNNING. WELL I LOOKED AND MY WHOLE ENGINE COMPARTMENT WAS FULL OF FLAMES. WE USED 4 FIRE EXTINGUISHERS TO PUT THE FIRE OUT & THE FIRE DEPARTMENT ARRIVED TO FINISH. MY VEHICLE WAS TOTALLED & I ONLY HAD LIABILITY INSURANCE.