DRIVING UNDER CRUISE CONTROL 65MPH (THE SPEED LIMIT) MY SPEED DROPPED, I ACCELERATED BUT TRUCK KEPT SLOWING,I SAW WHITE SMOKE COMING FROM THE HOOD AND BEHIND THE TRUCK, I SAW A WARNING ON DASH TO SERVICE ELECTRONIC THROTTLE SENSOR, THEN LIGHTS ON DASH FLASHED, I FOUND A SPOT ON SIDE OF THE ROAD AND PULLED OVER, THE ENGINE REVVED AND I HEARD VALVES CLATTER WORSE THAN I EVER HAVE,THEN THE MALFUNCTION INDICATOR LIGHT CAME ON, I STOPPED, PULLED THE HOOD AND SAW FLAMES AT THE FIREWALL AND TOP OF THE ENGINE COVER, THERE MAY HAVE BEEN FLAMES IN OTHER AREAS BUT I SHUT THE HOOD QUICKLY AND STARTED GETTING THINGS OUT OF THE TRUCK AWAY FROM THE FLAMES, CALLED 911 AND IT FULLY ENGULFED THE CAB IN MINUTES. THE FIRE TRUCK ARRIVED WITHIN A FEW MINUTES AND EXTINGUISHED THE FLAMES. TRUCK WAS A TOTAL LOSS EXCEPT THE BED.