As GM struggled with weak economic conditions and consumer caution, sales slumped 20.4% from a year ago to 308,817 vehicles. The top U.S. auto manufacturer said that despite the year-over-year decline, the sales total was its best so far in 2008.
Sales were boosted by a new discount program offering "employee pricing" on most models -- a plan extended through September 30.
The number of vehicles sold rose 31% from July, GM said, with some gains in larger pickup trucks and sport utility vehicles (SUVs).
Mark LaNeve, GM North America vice president, said: "With the recent moderation in fuel prices, we're seeing some relaxation of pent-up demand in pickups and utilities."
Copyright Agence France-Presse, 2008