One of these sites is the top-secret proving ground at Lang Lang, south-east of Melbourne, home to GM's "global product development team".
Here, crews work on the next wave of vehicles, and carry out thousands of tests on dozens of different models for GM's domestic and overseas brands each year: Cadillacs, Buicks, Chevrolets, Opels and Holdens.
The rooms all around are Ferlazzo's studios, filled with cutting-edge equipment, fabricators in black T-shirts and secret cars they are working on.
While the country may be seeing the end of the car manufacturing industry this month, it is not all doom and gloom if you are making products in Australia as business is booming for Rode microphones.
A US analyst is warning that consumers are balking at the i Phone X's high price and lack of innovation.
Eric Huang uses virtual reality goggles to help design car interiors at Holden's Port Melbourne plant.
Holden's design and engineering divisions will retain more than local staff.
I knew I was onto a winner when I sold microphones to a store in LA," he says. Two decades ago Freedman was newly married, had two kids to support and had just lost his house.
Freedman took one last gamble before he was going to give up his family's sound company for good, the audio entrepreneur bet it all on parts for microphones from China.
An industry report, released this year, forecast that the sector would remain robust, with more than 68, automotive retail, repair and services businesses that will be untouched by the plant closures and their flow-on effects. It currently employs , people, which, over the coming three years, is forecast to shrink by 15, Electric cars are part of the design revolution in automaking.
More change, however, is on the horizon: But change, many believe, is coming fast.
Industry leaders in Australia say the decision to retain local design and engineering was a "recognition of Australia's prowess".
The end of Australian carmaking, it must be said, does not spell the end of the automotive industry here as a whole.
The manufacturing industry, once the titan of Australia's economic growth, is now a shadow of its former self.