1) MONTHS PRIOR TO THE ACCIDENT AT HIGH WAY SPEED (65 TO 75 MPH) AFTER SEVERAL HOUR (FROM 1 TO 4) WITH THE CRUISE CONTROL ENGAGED, WHEN DISENGAGING THE CRUISE CONTROL, THE CAR WOULD VIBRATE VIOLENTLY. GM CLAIMS THEY CAN NOT DUPLICATE THE PROBLEM. 2) BRAKES FAILED - APPLIED BRAKES IN TRAFFIC, PEDAL WAS SOFT AND THEN WENT HARD LIKE THE POWER BRAKES WAS NOT WORKING, BUT THE CAR DID NOT SLOW DOWN, CAUSING THE IMPACT IN THE REAR OF A PICK-UP TRUCK. 3) ACCORDING TO THE AIR BAG REPORT THE CAR WAS TRAVELING OVER 30 MPH, BUT THE AIR BAGS DID NOT DEPLOY ON THE FRONTAL CRASH. *JB