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where is fuel filter on 2009 impala
Yes it could. If the fuel pressure is too low, the system can set a fuel system lean trouble code.
The 2003 Impala has a 17 gallon fuel tank
this code is a pressure leak in the fuel system -- check gas cap and eval system.
Trouble code P0171 means: Fuel Trim System Lean (Bank 1)
This car is not built with one, that function is done by the computer controlled fuel injection system.
The 2006 Chevrolet Impala runs on flex-fuel (FFV).
The 2010 Chevrolet Impala runs on flex-fuel (FFV).
The 2009 Chevrolet Impala runs on flex-fuel (FFV).
The 2007 Chevrolet Impala runs on flex-fuel (FFV).
The fuel pump in a 2005 Chevy Impala is located inside the fuel tank. To access it, you typically need to remove the rear seat and the access cover or drop the fuel tank itself. It's important to relieve the fuel system pressure before attempting any repairs or replacements.
The 2012 Chevrolet Impala runs on flex-fuel (unleaded/E85).