Economical problems for General Motors.
Some weeks ago, the American government had to buy around the 60 % of the enterprise, because if not, they'd declarate GM in bankrupty.
General Motors, and all of its brands of cars, are a symbol of the USA, and their way of life. Now, the enterprise and its models will change, they are going to create eficient, smaller, and non-contaminant cars.
In the photo you can see the headcuarters of GM in Detroit, USA (Renaissance Center)