FIRST OF THREE VEHICLE COLLISIONS THIS YEAR INVOLVING CHEVROLET SILVERADOS THAT HAVE CAUGHT FIRE AFTER INVOLVED IN FRONTAL IMPACTS. VEHICLE TRAVELING WESTBOUND ON SR 58 IN LANE COUNTY, OREGON. INVOLVED IN SECONDARY COLLISION WITH A TOYOTA PICKUP TRUCK THAT HAD BEEN STRUCK BY A LOOSE TRUCK TRACTOR WHEEL. THE IMPACT BY THE WHEEL CAUSED THE TOYOTA TO ENCROACH INTO THE PATH OF THE CHEVROLET. THE OCCUPANTS OF CHEVROLET WERE ABLE TO EXTRICATE THEMSELVES. THE VEHICLE SUBSEQUENTLY CAUGHT FIRE AND SUFFERED EXTENSIVE FIRE DAMAGE.