US carmakers General Motors and Ford
posted weaker US sales for August and announced cuts to planned fourth-quarter production.
GM has seen some of its brands' sales fall
GM and Ford saw their third straight month of lower sales, despite continued customer sweeteners.
GM said it was disappointed with its 7 % drop in sales, and Ford reported a 5.9% drop in results for US brands.
But Chrysler's side of DaimlerChrysler
reported a fifth-straight month of stronger results with a 1% rise.
It saw sales of its 300 sedan and Magnum sports wagon
continue to do well.
However, across the US automotive market Hurricane Charley's path through Florida, high energy prices, and falling consumer confidence, hurt sales results.
Sales of GM's Saab brand dropped by nearly a quarter, and results for Ford's Jaguar brand fell 33.4%.
Last week Jaguar announced it would cut production in the UK due to slack demand.
"Disappointing job gains over the last few months, combined with higher energy prices, is making life difficult for consumers just as the benefits from last year's tax cuts fade," said Ford economist Jarlath Costello.
Industry sales are expected to come in at a seasonally adjusted annual rate of 16.7 million vehicles, down roughly 5% from a year ago, said Paul Ballew, GM's head of global market and industry analysis.
Sales crept back from a rate of 17.2
million in July, and from 17.9 million in August last year.
Ford revealed plans to build 830,000 vehicles in the fourth-quarter, down nearly 8% compared to 900,000 produced in the same period in 2003.
And for the fourth-quarter, GM set its production forecast at 1.2 million vehicles, down nearly 7% from a year ago.