NHTSA Complaint #10607672 — 2009 CHEVROLET IMPALA

I HAVE NOTICED A SORT OF JERKING OR CHUGGING FEELING WHILE TRAVELING AT DIFFERENT SPEEDS AND DIFFERENT ENVIRONMENTS, SUCH AS HIGHWAY AND CITY. THE PROBLEM DOES SEEM TO BE WORSENING. THE SERVICE TECHNICIAN AT THE DEALERSHIP REFERRED TO THIS AS A "FISHBITE". I DID NOT SEEM TO REALLY NOTICE THE PROBLEM UNTIL REPAIR WAS MADE TO THE MANIFOLD AND CRANK CASE GASKETS, DUE TO A SEVERE OIL LEAK. THE DEALERSHIP DID LOOK INTO MY CONCERN FOR THE "FISHBITE", BUT A CODE WAS NOT FOUND AND THEY WERE UNABLE TO DUPLICATE THE PROBLEM. IS THIS A PRECURSOR TO THE OTHER COMPLAINTS INVOLVING LOSS OF POWER WHILE DRIVING? *TR