Updated from 1:09 p.m. EDT

General Motors

(GM) - Get Report

posted its second monthly sales increase of the year Friday, while

Ford

(F) - Get Report

and

DaimlerChrysler

(DCX)

reported more declines.

GM recorded a 3.9% rise in August U.S. auto sales, and the world's largest automaker also said it is planning for fourth-quarter production about 12% below last year's levels.

The company sold 363,521 light vehicles for August, up from 349,806 a year earlier.

Car sales rose to 156,723 vehicles from 150,900, while sales of light trucks, a category that comprises SUVs, pickups and minivans, rose to 206,798 from 198,906.

The increase came after GM's sales plunged in August of last year after the automaker ended a round of heavy financial incentives to lure buyers.

The company said it's planning for fourth-quarter output of 1.130 million vehicles, which is about 150,000 fewer than were produced in 2005's final quarter. Its third-quarter production forecast remains unchanged at 1.050 million vehicles.

Ford, which recently said it would cut fourth-quarter production by 21% from a year earlier, posted an August sales drop of 11.6%. It was the company's sixth straight monthly decline.

The No. 2 U.S. automaker said it sold 255,112 vehicles, down from 288,429 in the same month last year, when the company had juiced sales with its own heavy summer promotions. Ford's sales were up about 6% from July.

The company's car sales rose 8.5% from last year, but buyers continued to show a growing distaste for Ford's pickups, SUVs and minivans. Sales for that category dropped 21% from a year ago.

Meanwhile,

DaimlerChrysler

(DCX)

said its U.S. sales of passenger vehicles were down 3% in August.

Sales at its Chrysler Group, which includes the Chrysler, Dodge and Jeep brands, fell 4% to 179,165 vehicles, without adjusting for an extra selling day in the most recent period. Sales at the luxury Mercedes-Benz unit rose 7% to 20,602 units.