Building on a strong April, light-vehicle sales in Mexico improved 1.8 percent year-over-year in May.
Vehicle sales for the month were 83,962 units.
General Motors racked up 20,326 sales in May, up 18.8 percent from the year-ago month. Nissan remained second with 16,420, but its sales slipped 6.2 percent. Ford Motor Co. dropped 4.0 percent for the month to 14,514. DaimlerChrysler AG sales were up 6.0 percent to 9,921.
GM's Chevy Chevy was the most popular domestic car, selling 5,944 units.
The Nissan Tsuru was second with 4,851.
GM was the sales leader through the first five months with 101,424 units. Nissan was second with 88,487. Ford (76,395), Volkswagen (74,010) and DaimlerChrysler (51,167) followed. All posted increases, led by DaimlerChrysler's 20 percent year-over-year increase. GM jumped 19.8 percent.
For the first five months, total sales rose 18.2 percent compared with the same period last year.
Production increased year-over-year in May, up 6.5 percent to 137,513 units. Output is off slightly for the year, down 0.2 percent to 637,825.