hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
47,317 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 Trailblazer EXT engine problems

engine problem

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2004 Chevrolet Trailblazer EXT Owner Comments

problem #9

Jan 072008

Trailblazer EXT

  • 32 miles


Speedodometer and RPM clusters malfunctions, why

- Marion, OH, USA

problem #8

Jul 022012

Trailblazer EXT 6-cyl

  • 120,000 miles
All gauges on control panel not working, but all service lights come on check engine, ABS seat belt, reduce power, battery lights. Speed and fuel are impossible to know as well as warnings to observe from lights. 2004 Chevrolet trailblazer, speedometer will show a faster speed than you moving or will go to 0 while on the freeway. The tach has the same problem. This is a serious safety issue and it should be recalled now. I heard that they had the same issue on pick-ups and they were recalled. Most instrument backlights have burned out preventing the speedometer and other gauges from being seen at night. Very dangerous. Quick search on internet results in a severe epidemic of this problem with all GM SUV's. a class action lawsuit resulted in a nationwide recall for this problem for all similar vehicles but not the Chevy trailblazer or GMC Envoy. This seems to be a criminal act by GM. Something needs to be done to protect owners of these vehicles. Driving down highway headlights go out..while driving at night the low beam lights went out, I had to drive home with high beams on, www.aboutautomobile.com/complaint/2004/Chevrolet/trailblazer/electrical+system check out all these other complaints there are hundreds of them and I am one of many. This is so dangerous and a safety hazard to others as well, please get us a recall on these cars the expenses are tremendous.

- Forsyth, GA, USA

problem #7

May 012008

Trailblazer EXT

  • 30,000 miles
Issue originally occurring in 2008. Speedometer failed...first getting stuck then not returning to zero. When turning vehicle on again, speedometer would sporadically work, then get stuck, then stay on zero. Brought to 2 Chevy dealerships while still under warranty (purchased extended warranty on date of purchase) and was told "the problem could not be reproduced", so nothing could be done. The problem was intermittent, as well as "service engine light" going on for periods of time....again checked by GM dealerships and other mechanics but nothing found. Here we are in 2012, I recently started driving this vehicle again as my husband was driving it and apparently didn't mind the speedometer not working at times, but, with his unexpected death in November, and my son away at college, I had planned to give the vehicle to my son to take to college, but no speedometer is definitely a problem. As I am researching this issue I am seeing many consumers have had the same experience. Why has this not been a recall by GM. There are claims of other mechanics being able to repair this issue at a pretty hefty cost. I am in no position to pay for a repair of something that should have been taken care of under the warranty we purchased, which, by the way was not cheap. Is not safety something GM has on its' priority list. Driving with no ability to know how fast or slow you are traveling is definitely an issue. I request an investigation be launched to determine the cause of this defect, which I have no doubt will result in a GM recall to repair this safety issue.

- Dunmore, PA, USA

problem #6

Aug 012010

Trailblazer EXT

  • 62,500 miles


2004 Chevrolet Trailblazer ext. RPM gauge stop working and then now the RPM and speedometer is not working. I found a number of reports from others online stating that their RPM and speedo also stopped working. I have seen no recalls on this problem. I have no idea how fast I'm traveling.

- Kenosha, WI, USA

problem #5

Jul 082010

Trailblazer EXT

  • miles
I bought my 2004 Trailblazer ext 7 months ago everything was working fine for about 5 months until my tachometer got stuck in a downward position last weekend I ran out of gas even though the meter displayed 1/2 tank full. I've talked to the dealer and they said I would have to send the panel to GM plus 300 dollars to get repaired and I cant drive my vehicle until the panel is returned because the mileage has to stay the same. If this is an ongoing problem why cant GM come up with a solution instead of just taking people money with all of these problems.

- Waldorf, MD, USA

problem #4

Feb 072009

Trailblazer EXT

  • 63,000 miles
On February 7, 2009, we were driving on the interstate. When approaching traffic I took the vehicle off of cruise and began to slow down. However, the speedometer did not move. After that, everytime I began to accelerate, the speedometer would not move. Everytime I start the car it drops 5 mph, but when you use cruise or do a constant speed, it sticks again. We are getting ready to go on a big family vacation and do not feel safe taking my family in a vehicle that you don't know how fast you are going. My mechanic is replacing the cluster with a used one from the local salvage yard. A used one with labor is still going to cost me $200 and who knows how long that one will last. I cannot believe with this many complaints about the same equipment failure that GM hasn't done anything. It's just not safe!

- Cape Girardeau, MO, USA

problem #3

Feb 042009

Trailblazer EXT

  • 51,320 miles


The speedometer sticks and does not give accurate readings of speed (I.e. 70mph when stopped at traffic light). This began today and has not corrected itself. There are serious potential consequences of this problem as drivers will not be able to know their true speed. Nothing has been done yet to correct the failure. Research has shown average price of repair to be around $450.

- Conyers, GA, USA

problem #2

Oct 012008

Trailblazer EXT

  • 56,000 miles
As I was driving down the road the speedometer quit working.

- Cleveland, MS, USA

problem #1

May 112007

Trailblazer EXT 4WD 8-cyl

  • Automatic transmission
  • 43,000 miles
Pulling into traffic flow from a stop to 45 mph within a short distance the speedometer on my wife's 2004 Chevrolet trailblazer indicated I was doing 75 mph. Continuing at the traffic flow speed of about 45 with slight slowdowns and speedups for approximately 1.5 miles the speedometer climbed to 85 mph. When I came to a stop it went to 80 mph. Then, accelerating to 35 mph, it now read 105 mph. When I reached my destination and shut off the truck it went to 80 mph not 0. truck has 43,000 miles on it. *

- Larksville, PA, USA

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