General Motors is recalling 316,357 vehicles in North America because their low-beam headlights can stop working. The recall affects the Buick LaCrosse sedan and the Chevrolet Trailblazer, GMC Envoy, Buick Rainier, Saab 9-7X and Isuzu Ascender SUVs. All of the vehicles are from the 2006 through 2009 model years. GM says the low-beam headlights or daytime running lamps could intermittently or permanently stop working. If that happens it increases the risk of a crash. The issue doesn't affect the high-beam headlights, fog lamps or turn signals. GM says it hasn't yet determined whether the defect has caused any accidents. Dealers will replace the defective headlights for free. The latest recall brings to 30.4 million vehicles worldwide and 26.85 million vehicles in the United States that GM has recalled this year.