Three models are available: Impala ($21,485), Impala LS ($24,585), and Impala SS ($27,385). The base Impala runs with a 3.4-liter V6 rated at 180 horsepower. The more up-market LS comes with GM's proven and highly competent 3.8-liter V6, producing 200 horsepower. The new SS uses the same 3.8-liter V6, but boosted to 240 horsepower by a belt-driven, positive-displacement supercharger.
All models come with an automatic transmission, air conditioning with separate controls for driver and passenger; AM/FM/cassette stereo; four-wheel-disc brakes; a rear window defogger; power locks, windows, and mirrors; remote keyless entry; tilt steering; front and rear anti-roll bars; P225/60R16 tires, and stainless steel exhaust.
The LS adds anti-lock brakes (ABS), traction control, a sport touring suspension, aluminum wheels, fog lamps, a tire-pressure monitor, bucket seats with a center console, a six-way power driver's seat, a leather-wrapped steering wheel, rear deck-lid spoiler and cruise control.
The supercharged SS comes with a performance suspension, P235/55WR17 tires, a heavy-duty automatic transmission, leather seats, graphite interior appointments and lots of unique trim and identification, inside and out.
A long list of Preferred Equipment Groups add amenities at every level, and special appearance packages are available to add further distinction to the LS or SS. ABS is available as a stand-alone option ($600) with the base 3.4-liter engine. A driver's-side side-impact airbag ($350) is available on all Impalas. The 3.8-liter engine is available as an option ($995) on the base model, and comes with the touring suspension, tire-inflation monitor, and ABS; with the bigger engine, however, you are required to order a fairly expensive Preferred Equipment Group, so at that point it may make sense to spring for the LS. XM Satellite Radio ($325) is optional on all Impalas. OnStar is available as a stand-alone option ($695), but comes with several packages.