Vehicle sales in June fell at

Ford

(F) - Get Report

and

Chrysler

, but

General Motors

(GM) - Get Report

posted an increase in the number of cars and trucks being driven off dealer lots.

Meanwhile, GM, the world's biggest automaker, opened up a new front in the incentives war, saying it would bring back interest-free financing on many of its models.

Ford said vehicle sales fell 10.6% last month to 337,300 cars and trucks from 392,412 in June 2001. The company sold 128,649 cars, down from 149,651 a year ago, and 208,651 trucks, compared with 242,761 last year.

Chrysler, the U.S. arm of

DaimlerChrysler

(DCX)

, said vehicle sales totaled 202,822 units in June, a decrease of 4% from the same month a year ago. Truck sales fell to 152,389 from 158,919, and car sales dropped to 50,433 from 59,714.

Total car and truck sales at GM rose 4%. Car sales climbed 2.5% to 215,741, and truck sales increased 6% to 243,135.

GM's new 0% loan program prompted DaimlerChrysler to do the same for many of its offerings. Ford's new incentive program focuses more on rebates than interest-free loans.

Shares of GM were down 0.3% to $50.69. Ford was up 1.8% to $15.80, and DaimlerChrysler was off 2.7% to $45.73.