Two problems related to manifold/header/muffler/tail pipe have been reported for the 2009 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Chevrolet Impala based on all problems reported for the 2009 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?.
The contact owns a 2009 Chevrolet Impala. The contact stated that oil was leaking from the engine compartment. The vehicle was taken to an independent mechanic where it was confirmed that engine oil was leaking onto the exhaust manifold. The remedy was unknown. The vehicle was not repaired. The manufacturer was not notified of the failure. The contact referenced NHTSA campaign number: 15v701000 (engine and engine cooling); however, the VIN was not included. The failure mileage was approximately 63,000.