General Motors and Ford Motor posted lower March U.S. sales on Tuesday, dragged down by weak truck demand and expected cuts to car rental companies, while Asian rivals led by Toyota Motor continued to make inroads in the market.General Motors sales fell 7.7 percent and Ford's were off by 12.4 percent, as its critical F-Series pickup truck sales dropped 15 percent.
Chrysler Group, the troubled U.S. unit of DaimlerChrysler AG, also reported a fall of 8 percent in March, when adjusted for the number of sales days in comparable periods.
Toyota, which is expected to overtake GM as the world's largest automaker as soon as this year, posted a 7.7-percent increase in March on the strength of its sedans, including the Prius hybrid car, and crossovers or car-based sports utility vehicles.
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