BIOFUELS

GM believes biofuels, specifically E85 ethanol, is the most significant near-term solution to offset rising vehicle energy demands and reduce greenhouse gas emissions. E85 is comprised of 85 percent ethanol and 15 percent gasoline.

Sustainable biofuels made from non-grain sources could offset up to 35 percent of future vehicle energy demand by 2030. GM has announced strategic alliances with two leading cellulosic ethanol startups that cover the biothermal and biochemical spectrum in advanced biofuel technology. In January, GM invested in Coskata Inc. of Warrenville, IL, to
help commercialize its cellulosic ethanol made from a variety of sources including agricultural and municipal solid waste,and even old tires. http://coskata.com

In May, GM invested in Mascoma Corp. of Boston to cooperate on rapid commercialization of second- and third-generation biofuels made from plant and wood wastes. http://Mascoma.com

GM is the global leader in producing flexible-fuel vehicles. In the US, more than 3 million of the 7 million flex-fuel vehicles on the road are GM cars and trucks. GM is committed to making half of its vehicle flex-fuel capable by 2012.

How It Works:
E85 ethanol flex-fuel vehicles are designed to run on ordinary gasoline, E85 ethanol or any mix of the two. Every flexible fuel vehicle has an engine control module that helps to identify which fuel or mixture is running through the vehicle's sytem. Based on that information, the fuel system automatically adjusts itself to run on that fuel mixture.

Ethanol:

• Is a renewable fuel
• Helps to reduce greenhouse gas emissions
• Can reduce dependence on petroleum
• Reduces smog-forming emissions

2008 E85 FlexFuel model availability:

Chevrolet	Impala, Tahoe, Suburban, Silverado, Avalanche, Express
GMC	Yukon, Yukon XL, Sierra, Savana

For more information, contact:
Alan Adler
Manager, Biofuels Communications
248-857-4218 (office)
313-319-8486 (cell)

Phil Colley
Biofuels Communications
248-857-4131 (office)
248-613-9317 (cell)