WHILE IN THE DRIVE POSITION ON A HILL AT A STOP SIGN OR TRAFFIC SIGNAL, I REMOVED MY FOOT FROM THE BRAKE. THE VEHICLE BEGAN TO ROLL BACK ALMOST HITTING THE VEHICLE BEHIND ME. IT STARTLED ME AND ALMOST HIT THE CAR BEHIND. *TR IN THE SECOND INCIDENT, MY WIFE WAS PULLING BACK FROM PARKING SPOT WHICH HAS A SLIGHT INCLINE (GROUND LEVEL IN FRONT IS A BIT LOWER THAN THAT IN THE BACK). SHE REMOVED HER FOOT FROM THE BRAKE AFTER TRYING TO PARK OUT WITH THE GEAR 'R', THE VEHICLE NOW BEGAN TO ROLL FORWARD ALMOST HITTING A LITTLE STONE. MY WIFE WAS TERRIFIED. WE FURTHER TESTED THE VEHICLE ON VARIOUS HILLS/INCLINES BOTH IN DRIVE AND REVERSE AND IT CONTINUED TO ROLL IN THE OPPOSITE DIRECTION OF THE ENGAGED GEAR. APPARENTLY, THIS IS A CHARACTERISTIC OF THE AUTOMATIC TRANSMISSION ON THIS VEHICLE, AND IT DOES NOT HAVE "HILL-HOLD" OR "HILL ASSIST". HOWEVER, SINCE THIS FAMILY SUV CARRIES IS BEING DRIVEN BY MOTHERS, AND THIS MIGHT CAUSE THE SERIOUS SAFETY ISSUE. I SAW THERE ARE A LOT OF COMPLAINS OF THE SAME CASE, THIS ISSUE SHOULD BE BROUGHT UP AND CHEVROLET SHOULD DO SOME ACTION ON THIS.