2 generation 2007–2013 5.3 FlexFuel 4AT 2007 → 5.3 FlexFuel 4AT 4WD 2007 → 5.3 FlexFuel 6AT 2007 → 5.3 FlexFuel 6AT 4WD 2007 → 6.0 4AT 2007 → 6.0 4AT 4WD 2007 → 6.0 6AT 2007 → 6.0 6AT 4WD 2007 →