In this Wednesday, Jan. 9, 2013 photo, Chevy trucks line the lot of a dealer in Murrysville, Pa. General Motors' U.S. sales rose 16 percent in January, as auto sales continue to be a bright spot in the U.S. economic recovery, according to reports Friday, Feb. 1, 2013. GM says it sold almost 195,000 cars and trucks last month, led by the Chevrolet Silverado pickup truck, with a 32 percent gain. GM sold more than 35,000 Silverados in January, a good sign for the economy as businesses replace aging trucks. (AP Photo/Gene J. Puskar)

In this Wednesday, Jan. 9, 2013 photo, Chevy trucks line the lot of a dealer in Murrysville, Pa. General Motors' U.S. sales rose 16 percent in January, as auto sales continue to be a bright spot in the U.S. economic recovery, according to reports Friday, Feb. 1, 2013. GM says it sold almost 195,000 cars and trucks last month, led by the Chevrolet Silverado pickup truck, with a 32 percent gain. GM sold more than 35,000 Silverados in January, a good sign for the economy as businesses replace aging trucks. (AP Photo/Gene J. Puskar)

In this Wednesday, Jan. 9, 2013 photo, Chevy trucks line the lot of a dealer in Murrysville, Pa. General Motors' U.S. sales rose 16 percent in January, as auto sales continue to be a bright spot in the U.S. economic recovery, according to reports Friday, Feb. 1, 2013. (AP Photo/Gene J. Puskar)

In this Wednesday, Jan. 9, 2013 photo, Chevy trucks line the lot of a dealer in Murrysville, Pa. Ford, Chrysler and General Motors all reported double-digit gains for January as last year’s momentum in U.S. auto sales continued into 2013, according to reports Friday, Feb. 1, 2013. (AP Photo/Gene J. Puskar)