2003 Chevrolet Malibu Classic

WHILE DRIVING ON THE FREEWAY, MY CAR JUST SHUT OFF. I MANAGED TO PUT IN NEUTRAL AND RESTART THE CAR AFTER A LONG ATTEMPT TO DO SO. I ENDED UP REPEATING THE PROCESS AGAIN WITHIN A FEW MINUTES, BUT SINCE WE WERE SO FAR FROM AN EXIT WE CONTINUED TO DRIVE SLOWLY IN THE RIGHT LANE UNTIL WE REACHED AN EXIT WHILE LEAVING OUR HAZARD LIGHTS ON. THE CAR HAS NOW CONTINUED TO SEEMINGLY RANDOMLY REPEAT THE PROCESS AT ODD TIMES WITH SIGNIFICANT INTERVALS BETWEEN EACH EPISODE. I HAVE ALSO HAD A TREMENDOUS AMOUNT OF TROUBLE WITH THE VEHICLES ANTI THEFT SYSTEM PROHIBITING THE CAR FROM STARTING. NOW THE CAR HAS ALSO BEGUN TO STRUGGLE TO START AT RANDOM TIMES. SOMETIMES THE CAR STARTS JUST FINE, AT OTHERS, IT STRUGGLES OR TAKES SEVERAL LONG ATTEMPTS TO START, IF IT EVEN WILL. THE BATTERY, ALTERNATOR, AND FUSES ARE ALL GOOD. THE CHECK ENGINE LIGHT COMES ON SOMETIMES AND WHEN IT IS THE CODE JUST READS A COMMUNICATION ERROR WHICH SEEMS USELESS TO THE GARAGE. I AM NOT COMFORTABLE WITH MY PREGNANT WIFE DRIVING THE CAR. I AM CONCERNED THAT IT WILL BREAKDOWN, NOT START, OR WORSE, SHUT OFF WHILE SHE IS ON THE FREEWAY AND THEN NOT BE ABLE TO CONTROL THE CAR WITHOUT POWER STEERING. *TR