GMC Acadia is a middle range SUV which has good performance. GMC Acadia 2009 is bit expensive than others but it has many new features. basically 2009 GMC Acadia has 3.6 liter V6 engine with 225KW power. the engine has GDI technology. this new SUV has a navigator and a good sound system. and it has many electronic systems like Immobilizer, Stability control and Electronic brake distribution.