Toyota Motor North America's announced plans to build a battery plant may require the Japanese automaker to build another assembly plant in the U.S.

U.S. light-vehicle sales, hampered by lean stockpiles and chronic parts shortages, declined by double-digits in June, capping a weaker second quarter and first half. The SAAR tallied 13.22 million last month, the second lowest pace of the year. Lights trucks drove Ford to a 1.8 percent gain in the second quarter and a 32 percent June surge, ending a streak of monthly declines at the Ford brand and Lincoln.