DETROIT – Domestic automakers’ sales slid in June, lashed by higher gas prices and by tough comparisons with last summer’s discount-driven bonanza, the companies said on Monday.Struggling General Motors Corp. got the worst beating; its sales plunged 25.7 percent last month.But rising fuel costs were a boon to Toyota Motor Corp., which credited its fuel-efficient lineup for much of its 14.4 percent sales increase over June 2005. Honda Motor Co.’s U.S. sales were flat.Sales from a year ago slipped 15.5 percent at DaimlerChrysler AG’s Chrysler Group and 6.8 percent at Ford Motor Co., the companies reported Monday.Across the industry, sales were down 10.5 percent, with truck sales plummeting 19.4 percent and cars inching up 1.6 percent, according to Autodata Corp. The seasonally adjusted sales rate for June, which shows what total sales would be if they remained at the same rate for the entire year, was 16.3 million vehicles. Automakers sold 17 million vehicles in 2005. News source: AP