The 2004 Chevrolet Impala specs include three V6 engines: a 3.4L with 180 hp in the base car, a 3.8L with 200 hp in the LS, and a supercharged 3.8L with 240 hp in the SS. All are front-wheel drive with an automatic transmission, and all were built in Oshawa, Ontario.
Quick answer
| Trim | Engine | Power / torque | EPA mpg (city/hwy/comb) | Curb weight |
|---|---|---|---|---|
| Base | 3.4L V6 | 180 hp / 205 lb-ft | 19 / 29 / 22 | 3,389 lb |
| LS | 3.8L V6 | 200 hp / 225 lb-ft | 18 / 28 / 21 | 3,466 lb |
| SS | Supercharged 3.8L V6 | 240 hp / 280 lb-ft | 16 / 26 / 19 | 3,606 lb |
Engines and transmission
The base Impala uses the 3.4L LA1 V6, and the LS gets the 3.8L L36 V6. The SS added the supercharged 3.8L L67 V6 for 2004, which gives it a large jump in torque. A four-speed automatic is the transmission used on this generation, and the drive is front-wheel drive.
These are US EPA ratings, so Canadian L/100 km figures can differ. For scale, 22 mpg is roughly 10.7 L/100 km.
Size and cargo
- Wheelbase: 110.5 in (about 2,807 mm)
- Length: about 200 in (5,080 mm)
- Width: 73 in with mirrors
- Trunk: 18.6 cu ft (about 527 L)
- Fuel tank: 17 US gal (about 64 L)
- Seating: five
Trim differences
Traction control, a power driver’s seat, alloy wheels, a rear spoiler and hands-free phone were optional on the base car and standard on the LS and SS. Leather seats were optional on the base and LS and standard on the SS. The SS also has a larger turning circle (39.6 ft against 38 ft).
Buying a used 2004 Impala
- Check the transmission for hard shifts or slipping, and ask for service records.
- Look for coolant leaks and overheating signs, and for rust on the underbody and wheel arches.
- Run the VIN through the Transport Canada recall database to check for open recalls.
- Inspect the suspension and steering for wear, as these are common on cars of this age.
- If you buy the SS, verify the supercharger has been maintained.
This is a 20-plus-year-old car, so condition matters far more than the spec sheet. Prices vary widely by condition and region.
Looking at other older cars? See our V6 Honda Accord specs for a rival sedan, or our Chevrolet Chevette hatchback specs for an earlier Chevrolet.
Sources
Frequently asked questions
How much horsepower does a 2004 Chevrolet Impala have?
180 hp from the base 3.4L V6, 200 hp from the LS 3.8L V6, and 240 hp from the supercharged SS.
Is the 2004 Impala front-wheel drive?
Yes. All 2004 Impalas are front-wheel drive with an automatic transmission.
How big is the trunk of a 2004 Impala?
Kelley Blue Book lists 18.6 cubic feet of cargo volume.
What fuel economy does the 2004 Impala get?
The EPA ratings are 19/29/22 mpg for the base car, 18/28/21 for the LS and 16/26/19 for the SS (city/highway/combined).
What trims did the 2004 Impala come in?
Base, LS and SS.
Where was the 2004 Chevrolet Impala built?
At the Oshawa Car Assembly plant in Ontario, Canada.
