Yes they do at the intake manifold.
Just beneath the lower radiator hose is the drain.
It is on the intake manifold near the thermostat housing.
The 2002 Chevrolet Impala has a V6 engine.
The 2011 Chevrolet Impala has a V6 engine.
The 2010 Chevrolet Impala has a V6 engine.
The 2007 Chevrolet Impala has a V6 engine.
The 2008 Chevrolet Impala has a V6 engine.
The 2004 Chevrolet Impala has a V6 engine.
The 2009 Chevrolet Impala has a V6 engine.
The 2006 Chevrolet Impala has a V6 engine.
The 2001 Chevrolet Impala has a V6 engine.
The 2005 Chevrolet Impala has a V6 engine.