Two models are available, both four-door sedans. The base Impala uses a 3.4-liter, 180-horsepower V6 and starts at $19,149. The base 3.4-liter V6 also sees duty in the Pontiac Grand Am and Oldsmobile Alero.LS ($23,225) gets GM's proven and highly competent 3.8-liter V6, which produces 200 horsepower. Besides the larger engine, the LS comes standard with larger (16-inch) aluminum wheels, quicker steering, traction control, anti-lock brakes, and a wide range of electric amenities. The 3.8-liter engine is shared with the Buick Regal and Lumina LTZ. Next Page