WHILE DRIVING VEHICLE, FIRE CAME UP FROM BETWEEN THE CAB AND BED OF TRUCK. FIRE INVESTIGATORS CAME TO THE CONCLUSION THAT THERE IS A DESIGN FLAW IN THIS MODEL TRUCK WHICH ALLOWS DEBRIS TO ACCUMULATE UNDER THE SHIELD WHICH THEN IGNITED, AND THEN IGNITED THE SILICONE SEALER ON THE SHIELD WHICH ALLOWED THE FIRE TO IGNITE THE BACK SEAT.