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really awful
Crashes / Fires:
0 / 1
Injuries / Deaths:
1 / 0
Average Mileage:
58,257 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Chevrolet Impala fuel system problems

fuel system problem

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2004 Chevrolet Impala Owner Comments

problem #16

Mar 222010

Impala 6-cyl

  • 42,000 miles


Vehicle will on occasion not start and displays a flashing security light in the information center. If I wait 10 minutes the security light will go out and the car will start. Dealer stated they could not diagnose as problem was intermittent and not reproducible. Problem happened on occasion over next several years, all with same symptoms. Each time met with the same dealer denial and lack of ability to reproduce the symptoms. This year the problem became frequent and turns out to be a defective passlock II sensor or ignition switch. From reading this is a common problem but was never addressed or acknowledged by GM. Paid $1500 for replacement of ignition switch and BCM at local Chevy dealer, who acknowledged this is a common problem.

- Independence, MO, USA

problem #15

Jun 102013

Impala 4-cyl

  • 154,000 miles
My Chevy Impala few months I filled up with gas all the way and when I go T on the interstate the fuel gauge went down from full to half full of gas. This is very dangerous because no mechanic knows what seems to be the problem and it is very dangerous because I really don't know how much gas I have in the car. It can turn to empty tank in 20 miles of distance. When I add up more gas to it turns back to full. I need a solution. I have a small children and one vehicle to travel from home to work.

- Portsmouth, VA, USA

problem #14

Jan 012009


  • 55,000 miles
Car has had several major safety problems (1) defective fuel cap - lead to fuel emissions into atmosphere and malfunction of emission control system. (2) defective speedometer - could have lead to excessive speed, inappropriate speed, and/or crash (3) defective anti-theft security system - can either not allow the vehicle to start, or can cause vehicle to stop running and then not start upon operator command. Could lead to death or dismemberment.

- Bradenton, FL, USA

problem #13

Mar 082011


  • miles


I have a Chevy 2004 Impala in we been having problems since we got it last year one day the car started shaking in it cut off we got it fixed a couple months later it's back doing the same thing it did at I'm sick in tired of spending my money on getting all this self fix in for it to happen again I look on internet in know a lot of people with the same problem and I'm pretty sure you seen a lot of complaints so I think it's time for a recall 2000-2011 these cars are messing up big time.

- Hawthorne, CA, USA

problem #12

Jan 282011


  • 94,000 miles
The contact owns a 2004 Chevrolet Impala. The contact started the ignition and a significant amount fumes emitted inside of the vehicle from the fuel tank. The contact referenced NHTSA campaign id number: 07E021000 (fuel system, other: Storage: Tank assembly: Pressure relief devices) but was advised by the manufacturer that the vehicle was not included in the recall. The vehicle was neither diagnosed nor repaired. The approximate failure mileage was 94,000.

- Athens , GA, USA

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problem #11

Dec 062010

Impala 6-cyl

  • 134,000 miles
2004 Chevrolet Impala, 3.4L, 134,000 miles, fuel pressure regulator leak at cold (below freezing) start up. Leak was between the upper and lower stamped housing of the fuel pressure regulator canister. Leak was not at the regulator to fuel rail seal, or between the regulator to return line seal.

- Muskegon, MI, USA

problem #10

Jul 092010

Impala 6-cyl

  • 52,560 miles


Passlock system does not allow my car to start, I have been online and seen hundreds if not a thousand or so complaint's with the same problem.this car is useless if I cannot depend on it to start when I need it to, especially in a emergency situation since I live in a rural area of upstate New York that has no cell phone service if GM knows there are so many complaint's about a specific system they place in one of there vehicles, and all are identical. Then man -up institute a recall on the passlock system and restore the confidence in many of there customer's. I have a 2004 Chevy Impala 3.4 ltr.

- Horseheads, NY, USA

problem #9

Mar 202010


  • 82,000 miles
My car would randomly turn off while driving on the streets and on the middle of the highway going 55 miles per hour, or while stopped at a light. The car would stall up to 3-4 times per day most of the time and as time went on it got worse. I replaced the fuel pump, fuel pressure regulator, the battery, the fuel filter, the ignition switch, and the car still turns off in the middle of nowhere. The last time it happened was when my wife was driving to work the car stalled a few yards away from a railroad crossing (since she quit driving on expressway), luckily it didn't happen on tracks, no train was coming at that time. She had to wait approx. 25 mins for it to start after trying a few times. The next day the same thing happens but this time it didn't turn on, so she called the dealership and they sent a tow truck. The tow truck driver, when he arrived approx. An hour later, tried to start it but it didn't start either. So, when arrived at the dealership they tried starting it and by then it started. The shop manager, whom I had related this incident to was aware of the situation, so he then assigned a mech to stand by the analyzer monitor while the engine was running. They kept the engine running until it finally died on them again, while the mech was still there, I don't know how long (didn't ask). At this particular time the analyzer indicated that the crankshaft position sensor was the cause of the stall. Needless to say it was replaced and is now a month later and it's running just fine. Not a hint of stalling nor anything else. My concern is that anything can happen on a highway from a car that turns off randomly due to the crankshaft position sensor.

- Miami Lakes, FL, USA

problem #8

Aug 112008


  • miles
Fuel filter line does not stay securely attached to fuel filter.

- Jacksonville Beach, FL, USA

problem #7

Dec 012007


  • 98,000 miles
The speedometer started getting stuck about six months ago. For about eight months I have noticed that when I turn the steering wheel I hear a noise in the front of the car, like a knock or something. Also within the last couple of months I have also smelled gas when I first start the car, my husband could not see any leakage or anything until last week. It was leaking from the fuel regulator valve. Now the transmission is starting to shift hard sometimes. I haven't had the money to get it all checked out by the manufacturer but I was wondering if there have been any complaints on any of these things. Also I can hear a whistling sound when I press the accelerator. And my husband just informed me that he bought a regulator valve for it and some O rings because something is leaking antifreeze slightly. Can you help please!!!!!!!!

- Steele, AL, USA

problem #6

Nov 072007

Impala 6-cyl

  • Automatic transmission
  • 50,000 miles


The contact owns a 2004 Chevrolet Impala. The contact smelled gasoline in the vehicle. The dealer stated that the fuel system regulator was leaking. She smelled gasoline for over a month and took the vehicle to a mechanic. She thought the failure had been repaired; however, the odor remained. The contact then took the vehicle to a General Motors dealer and they made the repair. There is a safety recall on the vehicle, but the recall number was unknown. The powertrain was unknown as well. The current mileage was 60,899 and failure mileage was 50,000. *updated 12/12/07 the dealer stated repaired trunk light. Updated 12/12/07

- Bogalusa, LA, USA

problem #5

Sep 112007

Impala 6-cyl

  • Automatic transmission
  • miles
Gas leaking out throttle body. Car is idling low. Cuts off while driving. Instrument panel cluster went out and then all of the before mentioned problems started happening. Skips after being tuned up.

- Maxton, NC, USA

problem #4

Sep 022007

Impala 6-cyl

  • Automatic transmission
  • 38,000 miles
My 2004 Impala ss has had several failures of the instrument panel cluster. The first was incorrect speedometer readings that lead to total failure of the speedometer (sticking and/or erratic behavior of the speedometer needle). The second was improper fuel level indication (high level shown with low fuel light coming on - almost no fuel left). The latest is incorrect oil pressure indication. All of these are known issues with the model of stepper motor used to drive these gauges in many GM vehicles. My total cost for repair has been in excess of $300, not including the current oil pressure gauge repair (stepper motors for speedo and fuel level gauge). I plan on having all stepper motors replaced with the latest generation replacement (switec X25.168). This is something that GM needs to take responsibility for and correct as it is a very widespread issue.

- Grant Township, MI, USA

problem #3

May 102007

Impala 6-cyl

  • Automatic transmission
  • 87,550 miles
Vehicle has been stalling intermittently at any speed. Vehicle has stalled a total of ten times. The vehicle has been taken to the local mechanic shop five times and the dealership twice but no codes were found during testing. So far I have had new plugs/wires (tune-up), new coil pack, new ignition module and new crank sensor, and new fuel filter. The vehicle completely dies at any speed. Told possibility of bad fuel pump but dealership cannot be 100% certain this will fix the problem. While driving at 70-75 miles an hour the car completely shuts down. It is a miracle I have not been severely hurt or killed. Problems began in May 2007 and have been ongoing since then.

- Brownstown, MI, USA

problem #2

May 232005

Impala 6-cyl

  • Automatic transmission
  • 45,000 miles
The contact owns a 2004 Chevrolet Impala. The vehicle caught fire in the dashboard area and then spread to the hood. The fire occurred two to three months after the vehicle was purchased. A relative sustained injuries to the hand due to the fire. The cause of the failure was electrical. There is no fire or police report. The vehicle was repaired, but the contact does not know the specifics of the repair work. Three months after the repairs were completed, the check engine light illuminated and the vehicle began vibrating when the brakes were depressed. This failure occurred while driving 20 mph or more. The brakes and the disc were replaced and aligned. The failure continued to occur and the brakes were replaced within a month. The mechanic stated that the disc failed which caused the brakes to fail. The contact detects the smell of fuel within the vehicle. The fuel gauge has failed to operate normally since the repairs were performed. The fuel gauge indicated that the fuel level was full; however, the engine shut off and there was no fuel in the vehicle. There was also the presence of fuel on the ground after adding fuel to the vehicle. The dealer has not diagnosed the cause of the fuel gage failure or the odor. The inspector stated that the vehicle may not pass inspection due to the fuel odor in the interior. Although the brakes were repaired twice, the vibration continued to occur. The engine size was unknown. The contact can provide receipts for all of the repairs that were performed, including an insurance report. There is no fire or police report. The current mileage is 81,000 and failure mileage was 45,000. Updated 08/15/07.

- Cypress , TX, USA

problem #1

Apr 092007

Impala 6-cyl

  • Automatic transmission
  • miles
- the contact owns a 2004 Chevrolet Impala. The contact stated that against what was recommended in the owners manual. The gasoline station that he took the vehicle was using ethanol. The owners manual stated that the ethanol will damage parts in the carburetor, and in the engine, and parts made of rubber. The current mileage was 26,000. There had been no failure to date. Updated 04/30/07. The consumer provided 2 articles pertaining to the ethanol situation. The consumer stated the same ethanol that damages dispensing fuel pumps will also do damage and possibly cause fires in automobiles. Updated

- Cleveland, OH, USA

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