GM's Hybrid Strategy By Warren Brown Washington Post Staff Writer Friday, January 3, 2003; 1:07 PM DETROIT, Jan. 3 -- General Motors Corp. offered detailed plans today to boost the fuel economy of its most popular cars and trucks by as much as 50 percent, beginning with two pickup trucks in the 2003-model year. Overall gains in fuel economy will range from 15 percent to 50 percent, with the biggest increases going to the 2005 version of the compact Saturn VUE sport utility vehicle, GM officials said. As In Overdrive first reported last month, GM will rely on hybrid gas-electric...