CHICAGO -- General Motors announced the addition of 26 E-85 refueling pumps to stations in greater Chicago through partnerships with Shell Oil Products US and VeraSun Energy Corp. The collaboration is part of a broader, national GM campaign to boost the use and awareness of ethanol-based E85 fuel in the U.S. To promote E-85 fuel and vehicles during the Chicago Auto Show, several major Chicago buildings will be illuminated in yellow lights in reference to the corn used to make most of the ethanol in the U.S. E-85 supply, General Motors said. City "street teams" will randomly reach out to Chicagoans Feb. 10-12 and 17-19 with giveaways that promote GM's new "Live Green Go Yellow" E-85 marketing and advertising campaign. GM also will promote E-85 with a major presence in the 2006 NASCAR Craftsman Truck Series and with 2005 NASCAR Nextel Cup champion Tony Stewart. E-85 FlexFuel vehicles can run on any combination of gasoline and/or E-85, a fuel blend of 85 percent ethanol and 15 percent gasoline. "GM is pursuing gasoline-savings solutions on many fronts on the way to our ultimate vision of hydrogen fuel cell-powered transportation," said Elizabeth Lowery, GM vice president of environment and energy. "E-85 ethanol burns cleaner than gasoline and is a renewable, domestic fuel that can enhance the nation's economy and energy security." Shell will participate in a test pilot with GM to gauge consumer interest in alternative fuels by monitoring behavior at the pump. Shell will supply E-85 refueling pumps at approximately six stations in Chicago, and GM will market the availability of those stations to its customers and dealers.