General Motors Co aims by 2017 to buld up to 500,000 vehicles a year that include some form of electric power in the engine, including cars like the Chevrolet Volt plug-in hybrid, a top executive said on Wednesday.

GM has made rolling out cars with electrical technology -- including its eAssist system that boosts fuel efficiency in gasoline-powered cars -- a central part of its global strategy, global product development chief Mary Barra told reporters.

"Our plans call for producing up to 500,000 vehicles annually with some form of electrification globally by 2017," she said via satellite.

That would be slightly more than 5 percent of GM's global sales last year of about 9 million.

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