At 58348 miles, the speedometer malfunctioned, would not read zero miles at dead stop, while driving the speedometer would register inaccurately, very difficult to determine road speed, and drive safely. Dealer replaced instrument cluster at cost of $362.25. This is a safety item, as one cannot determine the proper speed while driving, it has occurred in many other Chevy Trailblazers also. It should be recalled.

- Winamac, IN, USA

I have had several problems with the electrical system in my 05 Trailblazer. Now I'm pretty sure the alternator needs replaced. It has already been to the shop once for electrical related problems and the vehicle only had 77,000 mile on it.

- New Castle, PA, USA

Just want to address the gas gauge and speedometer issues. I have a 05 Trailblazer and had both of these problems. Fortunately I work with a great dealership and I purchased the extended warranty because GM would do nothing and the fixes are very expensive. You can live with the gas gauge not reading correctly by tracking your mileage but the stupid bell goes off all the time telling you your near empty but you cannot drive safely if you do not know how fast you are going and you certainly cannot go with the flow as everyone seems to drive faster than allowed and I do not think the officer who pulls you over will care if your speedometer does not work. I also notice that my interior panel lights will flash off and back on again, makes me think I am seeing things. I think GM needs to find answers and fix these problems. I love my TB but it just seems like a lemon and I will look at something different when I purchase again.

- Fort Collins, CO, USA

When driving sometimes lights will become dim. When adjusting seat to drivers side mirror also turns upward. If opening right side passenger door in back with radio on, radio gets terrible buzzing noise. I have to shut vehicle off and turn back on again. Also my cd players has quit working for no reason at all and gets very hot and also sometimes when you start vehicle the mileage gauge will not work. Have to shut vehicle off and restart sometimes. This is a 2005 Trailblazer.

- Addison, MI, USA

1. check engine light stays on consistently no matter what repairs I have done. 2. speedometer fails to constantly. I recently got a speeding ticket for not staying within speed limit. 3. dealership has constantly said they have not heard of any complaints by any consumers. 4. onstar system has failed from a year after purchase. 5. occasionally stalls and smells of gasoline.

- Bakersfield, CA, USA

When driving at night and not on the throttle the headlights and instrument lights flash on and off in my 05 Trailblazer. It does it every night as I drive home and causes people around me to drive erratically. The truck also suddenly revs while coming to a stop. Twice it has caused me to tap the person in front of me while my headlights are flashing so it badly scares people around me. The dealership claims they can find no fault in the truck but the problems are becoming so bad that I am afraid to drive the truck and that is a very bad place to be stuck in. I have read that more then a few people have these issues and that there is no fix according to GM- so I felt that I had better report this here as well.

- Nottingham, PA, USA

The speedometer sticks at various speeds. Sometimes it shows *below* zero when I'm moving. Last night, I was traveling at approx. 65-70mph, I assume, but the speedometer was stuck at 30. When decelerating, the speedometer will stick at certain speeds, and then jerk down suddenly. My Trailblazer only has about 53,000 miles on it. I have seen reports of this issue beginning at 30K, but most kick in at around 50K. I am calling the shop today. From what I've read, it's related to a faulty stepper motor. If I am able to update this report, I will. However, I think this is very unsafe and am not going to wait to report it until after the repair; I've seen at least 40 (I stopped counting) other complaints about a malfunctioning speedometer in 05 Trailblazers on aboutautomobile.com (I also have issues with dimming lights and headlights flashing at night).

- Columbia, IL, USA

The fuel gauge does not work properly. It may show empty, quarter, or half full even though it is full. I see a lot of people have this problem. There should be a recall!! it's no wonder they can't sell them!!

- Cookeville, TN, USA

The contact owns a 2005 Chevrolet Trailblazer. While driving 35 mph, the contact noticed that she was not traveling as quickly as the other vehicles on the road. The speedometer read 120 mph. She took the vehicle to the dealer and they stated that the instrument panel failed. The dealer will replace the instrument panel. The VIN was unknown. The current and failure mileages were 46,000.

- Mount Vernon , OH, USA

My 2005 Trailblazers headlights flash when you let up off the gas pedal. Also, the amp gauge drops, the engine revs down and the inside fans and lights dim down. The flashing of the headlights is getting worse, and like others have reported, the traffic ahead thinks you are blinking them to either pull over, or speed up. I too notice it more in the colder months. I agree -this is definitely a safety hazard! something needs to be done about it. I have reported the problem, but they say nothing can be done. Purchased this SUV brand new, had problem from the beginning. Too many people with same problem. General Motors should be ashamed.

- Chincoteague, VA, USA

2005 Chevy trail Blazer. I've heard several complaints on this speedometer subject, and from what I understand it can be a very expensive procedure, hopefully my complaint can push for a recall.

- Gore, OK, USA

I was driving down the road driving about 40 mph, when I noticed that my speedometer was reading 80 mph and above. By the time I got home it was on 120 mph and now it wont go back down, it just stays on 80 mph until I drive it, then it jumps back up again.

- Springhill, LA, USA

Speedometer is broke mostly on 0 miles per hour while driving. I may be over speed limit without knowing.

- Denver, CO, USA

My headlights and dash lights flicker while driving. Also while driving my lights will dim and the blower for heat & A/C will slow and then pick up to normal speed again. It also revs by itself, even in park and will go forward slightly when it does surge. These problems only started after the alternator was replaced. I think it is a safety hazard to have lights flickering and engine surges.

- West Bend, WI, USA

Headlights, dashlight dim, battery gauge jump. The headlights, dashlights and all power dims or cuts out when letting off the gas. When in the gas it works fin. When I let off everything starts dimming and cutting out. At night time people in front of me think I'm wanting them to pull over because the light flash like a police cars would. I see many of the same complaints in msg boards and the dealerships know of the problem but have no fix. They tell you to deal with it. I think its a real safety issue and need to be addresses.

- Willow Spring, NC, USA

The headlights, dash lights and dome lights all flicker intermittently. I have had this problem since Nov 2004 when I bought the truck. Recently I've noticed the battery gauge fluctuate rather wildly when this problem is occurring. In my case, there seems to be a connection to the outside temperature. However, given the intermittent nature of the problem I can't be certain. I have noticed the problem more when the temps are around 35-45F. The dealer has seen the vehicle several times for the problem and still can't determine the issue. The big problem is they haven't been able to reproduce the condition. The truck now has 75000 miles and is 4 years old. The flickering/flashing has gotten much worse. On Dec 2, 2008 the flickering was more akin to outright flashing. Other drivers being noticeably affected.

- Haverhill, MA, USA

Instrument cluster malfunctioning. Speedometer, tachometer and oil pressure gauges are inaccurate. Also had to replace fuel sensor/sending unit before vehicle reached 50,000 miles.

- Alabaster, AL, USA

Instrument cluster. My speedometer has failed. My fuel gauge had failed a few months ago. My doors lock by themselves even when you are out of the vehicle. A couple of times away on a trip and locked out of the vehicle. My lights flicker at night to almost off. Chevrolet said they don't see a problem however if you get on line you are able to check many complaints about the Trailblazer of the same situation. Why does the consumer have to pay out of pocket for a product with many failures that should not have happened.

- Hollister, CA, USA

The vehicle in question is a 2005 Chevrolet Trailblazer with under 40,000 miles and very well-maintained. This is a continuing concern and have had the dealer mechanics look at this problem. While driving at any speed, the lights will dim dramatically when the accelerator pedal is released. The headlights and interior lights dim and return after accelerating for any length or magnitude and then return to normal brightness. Typically, they will dim 3 times. I am concerned about how severe this could become. The dealership said GM acknowledges this happening but says it is normal and no repair is available. This does not happen all the time but does happen 2-3 times a week and inconsistently. I cannot identify what causes it or what conditions consistently exist. However, this cannot be normal or safe.

- Thornton, CO, USA

The speedometer does not register the correct speed all the time. I was driving down the highway at 70 mph and the car said I was doing 110mph. The dealer said file a complaint because they get this problem a lot. There have been recalls on other GM cars with the same gauges as the 2005 Trailblazer. So why has there not been a recall for the Trailblazer?

- Panama City Beach, FL, USA