I WAS DRIVING DOWN FM 1960 I SAW WHITE SMOKE COMING FROM UNDER THE HOOD AND THROUGH THE VENTS. I TURNED OFF THE AIR CONDITION; THEN GREY SMOKE START BEING VISIBLE FROM THE UNDER THE HOOD. I CAME TO A YELLOW LIGHT AND TRIED TO BRAKE BUT THE BRAKES DID NOT WORK. WHEN I WAS ABLE TO GET THE TRUCK TO STOP, A CLOUD OF BLACK SMOKE CAME FROM THE GLOVE COMPARTMENT AND FLOOR BOARD AREAS. I EXITED THE VEHICLE AND ABOUT 30 SECONDS LATER THE FLAMES ENGULFED THE TRUCK. *TR