WHILE DRIVING IN TOWN, MAKING A LEGAL U-TURN AT A SAFE SPEED, THE POWER STEERING FAILED MID-TURN AND THE CAR WAS VERY HARD TO CONTROL AND THE STEERING WHEEL JERKED VIOLENTLY. IT IS UNKNOWN WHAT CAUSED THE FAILURE, HOWEVER THERE IS A RECALL ON MY VEHICLE CONCERNING CATASTROPHIC STEERING FAILURE. THIS STEERING FAILURE WAS CAUSED BY FAULTY MANUFACTURING/ EQUIPMENT BY GM.