2004 Chevy Impala the manufacturer installed passlock system continuously locks the car from being cranked. Everything will operate properly except being able to crank the vehicle. This happens about every 20 times you crank the vehicle. You have to wait at least 10 minutes before the vehicle will crank. If you take the key out of the ignition during that time it is likely that the system will not reset itself, thus starting the process over again. I contacted 2 GM dealerships who said they could not fix it. Had another mechanic look into it and he tried replacing the ignition but that didn't work either. That cost nearly $800. Now I sit in the blazing sun or freezing cold or rain and wait for the car to finally start. GM needs to fix this for all owners at no charge. Sadly for them, it is not just Impala that are having this trouble; it is across the entire product line of GM models.

- Corrigan, TX, USA

Driving on highway back from California thru Nevada speedometer all of a sudden stopped working and slowly dropped to 0 as done it at list 5 more time but only when driving on highways.

- West Jordan, UT, USA

Ignition sporadically fails to start vehicle. All electrical systems will turn on, but ignition will not turn over starter. Left with a completely unreliable car that has left me stranded on multiple occasions; only to go back to the car an hour later and have it start! told this is an electrical problem that GM has had on multiple makes of cars throughout the past. It is widely known to be a problem, yet no recall has been issued.

- Williston, ND, USA

For over a year, I have had problems with the electronic system for my 2004 Chevy Impala. For several months, the security light in my driver"S panel intermittently displayed when I placed the key in the ignition and my car failed to start. The car would eventually start after 15 ? 30 minutes. At first, this occurred sporadically but then became a more common occurrence. When I took my Impala to a local auto-repair shop, they were unable to diagnosis the exact problem. Their equipment reported a number of electronic errors but they were not able to pinpoint the precise cause of the car"S issues. Instead, they offered to reset the electronic codes and advised me to bring my car back at the first sign of any electronic issues. My Impala operated for the next few months without issue. However, a new electronic issue emerged with my vehicle. I noticed my car began to accelerate automatically. For example, if I was at a complete stop, the car began to accelerate at a moderate amount of speed as soon as I released the brake. Like the previous issue, this problem first occurred intermittently and soon progressed to a regular occurrence. When I took the Impala back to the auto-repair shop, the mechanics stated the automatic acceleration was due to a faulty ignition sensor. After I had the faulty ignition sensor replaced, the Impala once again ran without issue for a few months. However, the solution proved temporary as the previous automatic acceleration issue returned. I once again took my car to the auto-repair shop and once again, the mechanics blamed a faulty ignition sensor. At this point, I had the mechanics replace the ignition sensor. Since that point, my car has operated without issue until today. The security light in my drivers panel now continually displays whenever I drive. I feel as if I am at the end of my rope. I have spent a considerable amount of money to resolve this issue to no avail.

- Wichita, KS, USA

I have a 2004 Chevy Impala that has a crazy dash cluster!! I know that I am not the only one!! GM has recalled other types of vehicles with the same type of cluster problem, but won't recall the Impala that are having the same dangerous issue!! I have young two children that are always with me and when I'm driving ; not knowing how fast I am going, not knowing my temperature, or how many rpms my car is pushing! very serious when I'm not the only vehicle on the road. I hope GM addresses this problem for the safety of there customers! hopefully the government can push them to do something!!! we people with this issue will appreciate it greatly!!! thank you

- Indianapolis, IN, USA

For no apparent reason, the temperature gauge and speedometer have completely stopped working on my 2004 Chevy Impala. It is a safety concern that I do not know what speed I am driving or the temperature of my vehicle. I have not repaired or replaced the instrument panel because I can not afford it.

- Fresno, CA, USA

I have read on several web sites that thousands of people were having trouble with the passlock system on their GM vehicles and I am one of those thousands of people. I am having trouble with using my own key to start my own car, but it will not start for 10-15 minutes.

- Lemon Grove, CA, USA

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

The security light started coming on, and eventually the car began not starting. It started happening every once in a while, and now happens a few times a week. The lights, radio, and accessories work, but the car will not start. I have to wait 10 minutes to try again. This began about a month after my warranty expired. I took it to a shop, where they "located high resistance in ign cylinder connector to body control module removed and cleaned connectors and reprogrammed as needed". next day, security light went on, morning after that, car would not start! was told at the shop "if security light comes back on, will need to replace tumbler and new key and reprogram $690+ tax". I have a 2-year old daughter that I care for all day, and I work nights- leaving work at 1:30 a.M. I cannot have this happening. This seems to be a widespread problem among GM cars from 2000-2009, and I cannot find a true remedy for it.

- Tinley Park, IL, USA

Approx. 2007 - speedometer began fluctuating intermittently every few weeks. It corrected for a few weeks, then the problem would return. The frequency of the problem became worse in 2008. In 2009 it would fluctuate wildly, then "peg" to the maximum for extended periods(several weeks). Finally, it "pegged" to the maximum and has not returned. Inquiries result in estimates exceeding $500 to repair.

- Casco, ME, USA

04 Impala ls speedometer stopped working around 30000 miles all gauges fail to work never know how fast I am going could be a potentially dangerous situation. Speedometer gets stuck at various places does not move while driving. As well as the temp gauge have not gotten it fixed as of yet. Why is there not a recall?

- Clermont, FL, USA

2004 Chevy Impala. I go out to start the car and it will not start. I wait 15-20 minutes and it starts. The transmission also shifts hard. The speedometer says I am going 10 when I am going faster than that or it may say 100 when it is parked. Please, recall this.

- Van Buren, AR, USA

1. car will not start 2. unpredictable, car will not start un less you leave the key in the on position for 10 mis. 3. don't know how to fix. 100's of complaints online about the passlock system causing the issue.

- Tampa, FL, USA

My 2004 Chevy Impala speedometer has stopped working. The temperature gauge does not work at all and the fuel gauge works some time. This car is in otherwise excellent condition. Knowing your speed is certainly a safety issue. The dealer says getting it fixed is not a problem just give them hundreds of dollars.

- Canal Winchester, OH, USA

2004 chevorlet Impala temp gauge ceased to work and stuck in it's highest position. Tach gauge quit also. Replaced instrument cluster with rebuilt unit.

- Oreland, PA, USA

Now at 117,000 kms. Or past my five year warranty. Since 88,000kms. Have complained several times about temp gauge very out of whack on highway trips, lead me to believe severely overheated, but no message from car, just gauge going almost 90 degrees past "danger point " of gauge. In last two years temp gauge replaced three times. Obviously not the problem. Returns to normal function in city or short haul driving. Stop frequently, and under hood check shows no signs of overheating. Conclusion- electrical, sensor, problem and dealer keeps coming up with costly new equipment fixes which do not work. Now they want to blame a water pump leak and gaskets, although reservoir carefully watched by me. No leaks there. Have never had to add fluid, although I keep it always in car-that is the dexcool-water mix. Never down lower than recommended, and the dealer wants to give me a new water pump and take 1000-1200 out of my pocket. They have never mentioned the temp sensor, or any other fix. Travel on mountain highways 3 times per year, gauge now gone way over the top 6-8 times. Always stop. No sign ever of hose, radiator, water, lowered reservoir, or computer messages as per manual. Have read of numerous similar problems of this make and model, the 04 Chevy Impala ls, always gauges. In my case I will not approve another temp gauge "fix" and now speedometer is acting up as well, just like other drivers reported.

- Vancouver, Canada, 00, USA

2004 Chevy Impala will not start. Radio and windows will function, but car will not start....this will last about 10 to 15 minutes. This is the second time this has happened. This occurs about every 2 weeks.

- Ponca City, OK, USA

The speedometer will all of a sudden stop working and not give an accurate reading, and it makes clicking noise when it happens. It occurs around once or twice a week normally, with minimal driving. The dash has to be replaced to correct the issue, there are many other people with this problem and it should be fixed at the company's expense. This is a safety issue because I could be going the wrong speed and not have enough time to react to something such as a deer if I am going faster than it says I am or if I have to guess my speed.

- Wausau, WI, USA

2004 Chevy Impala, 35,000 miles. Was driving down the interstate and noticed that temperature gauge was reading in the red, pulled into a mcdonald's to see what was going on (normally the Impala has an alarm that goes off when overheating, this did not happen) as I decelerated, I noticed that the speedometer did not move, but rather stayed at 60mph, and the temperature gauge also did not move. Upon turning the car off, the speedometer moved back to 0, the temperature gauge stayed in the red. Turning the car back on did not reset the temp gauge, but as I accelerated, the speedometer stayed at 0 for the rest of the trip (I had to use gps to get speed). The speedometer has not worked correctly since. Doing some inspection later, I found this is an extremely common problem in Impala of most 2000-2010 Impala. Our local police force drives Impala, and the speedometers fail on roughly 60% at between 30K and 60K miles. A quick search online also revealed that it is a severe problem, and several people have been either pulled over, or had been going much to fast before noticing. Dealership says the only way to fix it is a complete replacement of instrument cluster($150 used, $400 new), and several people who have gotten the replacement simply have the problem again. As you can see, this is an extremely severe problem, and while the employees at the dealership say it happens all the time (at least 3 Impala with faulty speedometers per week), Chevy as a company does not seem to notice. Please help! links to some repair forums about similar problems: www.topix.com/forum/autos/Chevrolet-Impala/tjsmiqpd8J0ft5dk8 www.carcomplaints.com/Chevrolet/Impala/2004/accessories-interior/speedometer_gone_haywire.shtml www.automotivehelper.com/topic640920.htm www.automotiveforums.com/vbulletin/T752665.html.

- Springfield, MO, USA

I have a 2004 Impala and about once a week it won't start for about 10-15 minutes. Have to sit there a jiggle the key around. Took it in and the Chevy garage could not figure it out at all and I was charge for this answer "I don't know" something is seriously wrong when you have thousands of people complaining of the very same thing in their Impala. I received all kinds of possible solutions like a new computer that costs over a $1000 give me a break.

- Wolf Point, MT, USA