>HOME Hummer - 2009 CO2 Emissions Type Emissions Hummer H2 6.2 V8 Adventure 412 g/km Hummer H2 6.2 V8 Luxury 412 g/km Hummer H3 3.7 Adventure 346 g/km Hummer H3 3.7 Luxury 346 g/km Hummer H3 3.7 SE 346 g/km