The General Motors Corp. delivered 375,682 vehicles in May in the United States and that amount is up by 0.7 percent as compared with year-ago monthly sales. On an unadjusted basis, sales rose by 8.8 percent. The automaker’s May retail sales of 279,731 were up 8.5 percent. Also, retail sales increased 12.8 percent compared with a year ago.
May sales reflected the strength of the automaker’s new product portfolio. Increased sales of the Chevrolet Impala, GMC Acadia, Saturn AURA,...