With their sharp decline in market share, they have frankly got too much capacity, too many plants, too many people to be profitable in North America.
GM has to solve its problems (in the United States) before it can be profitable again. China is not going to bail out the company.
Truck-based models cost less for U.S. car markers to produce because they already have all the parts developed for their truck business. These truck-based SUVs have been the most profitable segment for Detroit in recent years, so developing new car-based models will eat into margins.
The passenger cars are not inherently as profitable as big SUVs or big pickups, but they have to refurbish their car line, even if it doesn't get them back to historical profit margins,
It's still a very profitable segment. That's why everyone is getting into it. But you will definitely see more incentives.