About 2011 Chevrolet Impala The Chevrolet 2011 Impala family sedan continues to combine fuel efficiency and fuel options with roominess and popular standard features. The Impala offers a long list of standard peace-of-mind amenities -- including important safety features -- in a package designed to provide pleasing design and functionality for today's on-the-go families. Impala is offered in LS, LT and LTZ retail models. For the 2011 model year, the 3.5L V-6 that is standard on LS and LT models is FlexFuel-capable, able to operate on gasoline, E85 bioethanol or a combination of the two. Also for 2011, a new Luxury Package combines a number of popular comfort and convenience items, including a full year of XM Satellite Radio instead of the customary three-month trial, a Bose eight-speaker audio system, front bucket seats with leather appointments, front driver and passenger heated seats and a rear spoiler. Chevy Impala conveys sophistication and big-car roominess. On the exterior, large headlamps have a premium appearance with three independent lighting units. These details complement other high-quality attributes, such as tight tolerances of 3.5 mm or less between body components and substantial "grab"-style door handles, to provide an overall feeling of solidity. The Impala LS, LT and LTZ models have varied exterior trim cues that identify each model including unique 16-, 17- and 18-inch wheel designs. Impala's V-6 engines are as fuel-efficient as they are sophisticated. A 3.5L V-6 delivers 211 horsepower. The 3.9L V-6 is standard in LTZ and rated at 224 horsepower.