2012 Chevrolet Impala Fuel System Problems | CarComplaints 2012 Chevrolet Impala fuel system problems with 15 complaints from Impala owners. The worst complaints are fuel/propulsion system, fuel system, gasoline:delivery:fuel pump. 2012 Chevrolet Impala Maintenance Question | AskPatty Just purchased a used 2012 Chevy Impala LT with 30,000 miles. Does it have a replaceable fuel filter and PCV valve? Can't find any part listings at local parts stores.