The Impala is back  www getchevyvideo com The name that graced more full size cars in American driveways in the 1960s than any other returns on a new 2000 model that becomes Chevrolet s flagship sedan  Eventually destined to replace the Chevy Lumina  the Impala benefits notably from chassis advancements and noise and vibration improvements  Like its  60s predecessors  the new Impala is...