INTERMITTENT LOSS OF POWER STEERING AT LOW SPEEDS WHEN TURNING INTO DRIVEWAY OR IN AND OUT OF PARKING SPACES. ALSO WAS ESPECIALLY BAD WHEN BACKING INTO A PARKING SPACE ON A HILL, WHEN I COULD NOT TURN THE WHEEL AT ALL UNTIL I STARTED APPLYING GAS TO GET THE CAR MOVING. AT THESE TIMES THE STEERING WHEEL IS EXTREMELY HARD TO TURN. I HAVE TAKEN TO THE DEALER FOR INSPECTION TWICE AND CANNOT DUPLICATE THE PROBLEM WHILE THERE. THE DEALER GETS NO ERROR CODES ON DIAGNOSTIC AND CANNOT SEE ANY LEAKS OR MECHANICAL PROBLEMS. THEY HAVE CONTACTED GM WHO SAYS THEY DO NOT HAVE ANY BULLETINS RELATED TO THIS MATTER. THIS PROBLEM IS VERY UNSETTLING AND POTENTIALLY VERY DANGEROUS. I HOPE GM WILL INVESTIGATE AND COME UP WITH A SOLUTION. *JS