WE HAVE BEEN MAINTAINING OUR VEHICLE AND HAD NO WARNING LIGHTS AT THE TIME OUR TRUCK DIED . AT THE TIME OF THE INCIDENT IT HAD OIL AND WATER. WE WERE DRIVING ON THE FLORIDA TURNPIKE AT FULL SPEED WHEN SUDDENLY, THE TRUCK STARTED SHUDDERING, AND THEN IT COMPLETELY LOST POWER. A CLOUD OF BLUE-WHITE SMOKE CAME OUT OF THE BACK OF OUR TRUCK. WE WERE LUCKY TO BE ABLE TO GET OFF OF THE TURNPIKE TO A SAFE PLACE. WE COULD HAVE BEEN KILLED. THE MECHANIC HAS DETERMINED THAT THE ENGINE IS LOCKED UP AND CAN'T BE FIXED. OUR TRUCK ONLY HAS 134,000 MILES - IT SHOULD NOT HAVE BLOWN UP LIKE THIS.