The 3.9-liter V-6 engine offered as an option on 2006 models is standard on all 2007 Uplander models. Also, a FlexFuel version of the engine that can operate on gasoline and agriculturally-derived E85 ethanol fuel is available on all but the regular-wheelbase LS model. All-wheel drive is no longer offered, but GM’s StabiliTrak electronic stability system is now standard on most Uplander models.