General Motors ( GM) and Ford ( F) both saw U.S. sales fall in June from a year ago, hurt in part by an unusually strong May. The declines fit into a larger picture of moderating consumer demand in the U.S., a trend evoked previously in reduced earnings guidance from Wal-Mart ( WMT) and Target ( TGT) and last week's downward revision of first-quarter gross domestic product growth.

Of the Big Three, GM saw the biggest decline, with U.S. vehicle sales falling 15% to 380,267. The fall reflected identical 15% slides in both car and light truck sales.

"Coming off strong May sales, GM's June sales were weaker than we expected," the company said in a statement. "For the first half of the year, our sales were up slightly, led by growing truck sales and launch vehicles. For the second half of the year, we need to accelerate our selling pace and produce stronger results."

In the U.S., GM's car sales fell 17.8% to 152,587, while light truck sales fell 16% to 213,261.

GM's North America division left its 2004 third-quarter production forecast unchanged at 1.2 million vehicles, consisting of 475,000 cars and 725,000 trucks.

At Ford, U.S. car sales fell 16.7% from a year ago to 92,580 in June, while U.S. truck sales fell 2.7% to 194,801. The 7.7% decline brings the total year-to-date decline in Ford's U.S. car and truck sales to 3.3%.

Among its major brands, Ford saw a 24% year-over-year decline in Taurus sales to 22,665, and an 18% decline in Explorer sales to 26,434.

The U.S. division of DaimlerChrysler ( DCX) said passenger vehicle sales rose 5% to 226,736 in June, providing the industry's lone bright spot.

DaimlerChrysler sold 209,252 Chrysler Group cars and 17,484 Mercedes Benz vehicles in the month, up from 198,962 and 17,233 a year ago. Year-to-date sales have now risen 2% to 1.24 billion, the company said.

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