GM to Invest $449 Million in Electric-Car Development

General Motors Co. GM -2.23%  on Tuesday announced a $449 million investment in two Michigan plants to bolster the development and production of its Chevrolet Volt and Cadillac ELR hybrid-electric vehicles.

Ford ratchets up plants' efficiency

Ford Motor Co.’s 11 North American assembly plants are humming at 135 percent efficiency, which could grow as the automaker continues to fine-tune manufacturing processes.

Chevrolet Volt Fleet Accumulates 400 Million EV Miles

The tally of electric only miles accumulated by Chevrolet Volt owners surpassed the 400,000,000 mile mark yesterday, equivalent to walking the Great Wall of China 30,000 times, according to General Motors.