CONTACT STATES: CONTACT WAS DRIVING VEHICLE SLOWING DOWN TO PULL INTO A PARKING SPOT, BETWEEN 7-10 MPH, THE ABS ENGAGEMENT DOES NOT ALLOW YOU TO BRAKE COMPLETELY AND COME TO A COMPLETE STOP AND THE CONTACT HIT A GUARD RAIL. NORMAL WEATHER CONDITIONS. GENERAL MOTORS BEING INVESTIGATED FOR THE BRAKE PROBLEM. GENERAL MOTOR REFUSED TO TAKE CARE OF THE BRAKE PROBLEM, THEY WOULD TAKE CARE OF IT BUT CONTACT WOULD BE RESPONSIBLE FOR THE COST. THE SERVICE MANAGER AT A GM DEALER SAID THIS PROBLEM HAPPENS APPROXIMATELY 30,000 MILES. CONTACT UNPLUGGED THE ANTI LOCK BRAKE SYSTEM