The BCM (Body Control Module) of the Passlock system is malfunctioning. It will need to be replaced. I just had it done to my '03 Impala.
The 2011 Chevrolet Impala has a V6 engine.
The 2001 Chevrolet Impala has a V6 engine.
The 2005 Chevrolet Impala has a V6 engine.
The 2013 Chevrolet Impala has a V6 engine.
The 2008 Chevrolet Impala has a V6 engine.
The 2009 Chevrolet Impala has a V6 engine.
The 2004 Chevrolet Impala has a V6 engine.
The 2010 Chevrolet Impala has a V6 engine.
The 2007 Chevrolet Impala has a V6 engine.
The 2002 Chevrolet Impala has a V6 engine.
The 2006 Chevrolet Impala has a V6 engine.
The 2012 Chevrolet Impala has a V6 engine.