Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
73,307 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.

2003 Chevrolet Trailblazer EXT engine problems

engine problem

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2003 Chevrolet Trailblazer EXT Owner Comments

problem #6

Aug 042010

Trailblazer EXT

  • miles


I, along with many others are experiencing major problems with the instrument panels on our Chevrolet trailblazer. My mother traded hers in because her speedometer was going out. But my problem is much worse, my whole entire dashboard is out. My gas gauge doesn't work, my speedometer doesn't work, my oil pressure doesn't work, my thermostat doesn't work, nothing works. My cruise control acts up too.

- Bay Saint Louis, MS, USA

problem #5

Aug 292008

Trailblazer EXT 6-cyl

  • miles
I am a senior citizen I brought this car new. After one year I had to replace linc plate. Over the years everything has gone wrong with this car. Speedometer has not worked since Aug. '08, gas gauge stopped Oct. '11. Instrument cluster since 2010 and GM knows this is a defected part. Yet GM paid for this same defected part at their cost for the Tahoe, but has not paid for the trailblazer. Why? windows and doors do not unlock on command. Window wiper(rear) stopped working-I replaced that part. A/C comes on my itself. Thermostat failure. I think GM should stand behind their product. The only reason they would not is that they already know that they are producing substandard products that are not fit to be driven on the road.

- Huber Heights, OH, USA

problem #4

Sep 052011

Trailblazer EXT 6-cyl

  • 268,842 miles
I was driving to work when all of a sudden I realize that my speed odometer wasn't working and I had to push the brakes because it felt that I was going to fast and the speed limit was 35 however my speed odometer was stuck on 10mph.... but it was probably going at about 55 mph...

- White Lake , NC, USA

problem #3

May 172011

Trailblazer EXT

  • 40,000 miles


2003 Chevy Trailblazer ext. Speedometer has malfunction continuously for the last 4 years. Very dangerous. Company (GM) says it is not dangerous and they do not have enough complaints. Thousands on the internet.

- Beaver Dam, WI, USA

problem #2

Jul 172009

Trailblazer EXT

  • 50,000 miles
Chronic problem/failure of instrument gages/cluster relating to speedometer, temperature and oil pressure for a 2003 Chevy Trailblazer ext. For example, the speedometer will unexpectedly raise to an alarming speed reading while the vehicle is not actually traveling more than a few miles per hour. Dealer advises that this condition is not covered by any recall notice and GM is unwilling to provide any assistance to alleviate this serious and unsafe condition. Other GM vehicles have been recalled for this exact condition. Also, this vehicle has experienced a cracked exhaut manifold due to poor design/engineering.

- Buffalo, NY, USA

problem #1

Dec 082005

Trailblazer EXT 4WD 6-cyl

  • 81,000 miles
While driving, my speedometer stopped working completely. I have had it checked by both a GM dealer and an independent repair shop. I was told the entire "cluster" would have to be replaced. I was also told that there are many of these problems and that there is a 2-3 week delay in getting the part shipped. I was also told it would cost about $400 to get it fixed. My car is a 2003 and has about 81,000 miles on it. A speedometer is not like an alignment, wear and tear item, or neglect of having it serviced. It is obviously a safety concern because of speed, the inability to get the part in a timely manner and the unwillingness of GM to cover the repair.

- Fort Mill, SC, USA

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