GM?s upcoming lineup of Duramax Diesel equipped trucks are now spec?ed to r
2010 GMC HD 3500 shown ? With the upcoming Duramax 6.6L Turbo Diesel, B20 fuel can be used. GM announced that its new lineup of heavy-duty diesel pickups will have B20 biodiesel capability. B20 fuel is a blend of 20-percent biodiesel and 80-percent conventional diesel, which helps lower carbon dioxide emissions and lessens dependence on petroleum. The announcement was made at the National Biodiesel Conference.