GM's U.S. sales fall 16 pct in August Thursday September 1, 1:53 pm ET DETROIT (Reuters) - General Motors Corp. (NYSE:GM - News) on Thursday said U.S. sales in August fell 16 percent as its "Employee Discount for Everyone" incentive program lost momentum. The world's largest automaker said its U.S. sales totaled 355,180 vehicles in August compared with 406,623 in August last year. GM adjusted the percentage change to account for one extra selling day in August 2005. GM results also include its Saab brand and some medium- and heavy-duty trucks. GM also said it is planning to produce 1.3 million vehicles in the fourth quarter in North America, up 1.8 percent from the year-ago period.