Grossly Mismanaged was forced into this due to York/Kerkorian's insistence (they don't think Rick Wagoner is moving fast enough) that they meet. York apparently contacted Ghosn. Ghosn miracously turned around Nissan in a VERY quick time frame and, I believe, Y/k think he can help out GM. Problem is that GM, at this point, doesn't have a small car strategy. Their addiction to large SUV type vehicles has hurt them badly.
One solution would be to hire Roger Pensky to run GM He is probably the best manager in U.S. for automotive sector. He bought GM's diesel and has made a success out of it.
Both the Corolla and the Camry have gotten larger overall while their MPG figures don't seem to have suffered proportionately; people really aren't fond of small cars.