NHTSA Complaint #10587564 — 2009 CHEVROLET IMPALA

I'M TRIED OF MY DOORS NOT LOCKING WITH KEY FOB AND BOTH REAR DOORS AND SOMETIMES PASSENGER SIDE WOULD NOT LOCK. THIS PROBLEM HAVE BEEN OCCURRING SINCE APRIL 2013 AND TODAY MAY 2014 IT'S STILL HAPPENING.I ATTEMPTED TO LOCK FROM INSIDE VEHICLE AND WOULD STILL NOT LOCK OR UNLOCK. I HAVE TO MANEUVER WALK AROUND THE CAR AND LOCK THE DOORS INDIVIDUAL. EACH TIME I TAKE THE CAR TO THE DEALER THEY ARE TELLING ME THAT THIS IS NOT COVERED PART. WHEN I PURCHASED THIS VEHICLE THEY CLAIMED THEY CONDUCTED A FULL VEHICLE CHECK. I THINK THEY LIED AND THEY CAR WAS NEVER CHECKED. WHY DO US AS CUSTOMER BUY WARRANTS AND THE WARRANT DON?T COVER ELECTRICAL POWER. IS THIS A ELECTRICAL PROBLEM? WHAT CAN BE DONE TO PREVENT THIS PROBLEM? *TR