Canadian auto sales rose in March from a year earlier, industry data showed on Wednesday, even as several major manufacturers, including General Motors Co and Toyota Motor Corp , reported declines. Automakers sold 160,274 cars and trucks in Canada, up 1.9 percent from March 2013, according to DesRosiers Automotive Consultants, despite an economic slowdown in the oil-rich province of Alberta, which has been hit by the plunge in crude prices.