How many cars will they be told to replace? Not that many. Some of these beaters are around 10 years old. That's two normal GM lifetimes already. Even in Southern California where cars don't rust and small cars are prized, I don't see that many on the roads anymore.
How often does a GM small car even last more than 200,000 miles?
I can see this stock hit $30 for it's low...all this bad news, well it's gonna get worse. But that will be temporarily. The stock will go back up to where it belongs, meaning you can make a few $ per share if it hits $30.