Detroit-based GM and other automakers around the world are looking to China's fast-growing market to drive sales amid slack demand elsewhere.
Chinese auto purchases surpassed those in the U.S. for all but two of the first 11 months of the year. Total sales for December are yet to be released.
GM said its own China sales in December soared 96.6 percent from a year earlier to a new monthly high of 189,793 vehicles.
GM China president Kevin Wale says the automaker expects 2010 sales to be even stronger.
Beijing has helped to boost auto sales with tax cuts and subsidies for drivers to shift to cleaner, more fuel-efficient cars.
