GM to double production of fuel-efficient engines

GM announced that the production will be doubled for the fuel efficient cars . Most of the production will be made in north America because GM has faced a serious drop in demand for its gasoline guzzling trucks and sport vehicles. In my opinion this process should have happened 20 years ago. Instead, GM is very enthusiastic about its new Chevrolet Volt and already doubling the production before they got a feedback from the market, probably another mistake.