They might shift production to the US for the VF/WM chassis for two reasons...
1. The Impala is only half the car that the Caprice is, especially for Plod use.
2. South America, particularly Brazil is still a growing economy, and the Chevrolet Omega sells well there.
Could mean some respite, but expect LHD only, unless GM build RHD Chevrolet SS for Oz, NZ and us.
Building a single global brand to US/Euro standards should be enough to allow any given vehicle to be sold anywhere in the world. If it works for VW/Audi/BMW and Mercedes then why not Chevrolet

Sure, Vauxhall/Opel are historically important, but would it not be better to be part of a global network, selling British built models globally, than to have no part in it?
I would like to think it possible to be able to order a 3.6 lpg Omega Estate from my local dealer at a sensible otr price, possibly plus delivery, in the same way that someone in Hawaii would be able to order an Astra VXR on the same terms...
Sure, buying a locally made Chevrolet model will be cheaper because delivery is cheaper, and lead times will be alot shorter, but I am confident that people will choose and buy cars which tick all their boxes, regardless of where they are made, as they do already
