Auto industry analysts predict that by as early as 2007, Toyota — the world's second-largest automaker — will increase production capacity at several of its six North American assembly plants, including the Tundra truck plant under construction in San Antonio. Sources knowledgeable about Toyota's manufacturing decisions said Monday that Toyota's San Antonio plant and its plants in Mexico and in Canada would be the most likely choices for expansion because those plants have smaller production capacities than Toyota's three other North American plants. Toyota Motor Corp. officials have indicated recently that within a few years Toyota may begin production in...