Welcome to the Team Jake, but that is the wrong Impala. The V6 front wheel drive Impala is a name only so far as we are concerned here.
Our interests are mired in the sixties centered around large inefficient gas gulping V8s with rear wheel drive in cars that weigh two tons. You can seat six for dinner and not be interrupted by road maps or restaurant ads on the dash. Only music is supplied by the purr of twin exhaust without a catalytic converter.
I do know that about a third of the new Impala is made in Japan, and about five percent in Germany, with another fifteen made in Canada. It was the first of GM's new "World Class" cars made out of parts from around the world. (at companies that GM had a reciprocal agreement with in that they owned a sizable investment in the company (SAAB, Opal, Issuzu, Misubishi, etc.)