volume sedans such as the Pontiac G6, Chevrolet Cobalt and Buick LaCrosse are vital to our success in the marketplace. We are beginning to show significant year-over-year gains with our launch cars compared to the models they replaced," said Mark LaNeve, GM's vice president for North American sales, service and marketing. At Ford, the Mustang continued its galloping pace with sales of 19,559 _ the highest April sales for the pony car since 1980, Ford said. --more 2307 Local Time 2007 GMT