although I dont have any insider information, Ive been working on websites for GM for about a year now, so Ive been paying some attention to their sorry state of affairs.
Short story is: GM is messed up. Thats pretty obvious just by looking at the news, but I can confirm that at least in the Western Region, they have their heads up their xxxes. And from what I understand, getting away from GM would be in Isuzus best interest. Unfortnately, it sounds like they are still going to use GM for joint development and manuf. of trucks and engines. So it doesnt sound like they are getting that far from them.
I also know that when I called around about taking my VX into the one of the dealerships here in Los Angeles, not many of the tech guys have much knowledge about them.
So I say get away from GM, but it sounds like there will be a transition period during which its gonna be kinda hard to figure out if GM and Isuzu are still working together or not.