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. Notes: Carrying the not-so-proud traditions of its 2002 predecessor, the 2003 has a handful of instrument panel malfunctions that can leave you guessing your speed, engine temperature or how much gas is left in the tank.


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
72,100 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 cooling system problems

cooling system problem

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2003 Chevrolet Trailblazer Owner Comments

problem #5

Oct 032009


  • 81,000 miles


The fan clutch on my 2003 Chevrolet Trailblazer has failed for a second time. First failure at 81000 miles and failure of dealer installed replacement at 115000. The failure results in a loss of acceleration ability, the noise level is a considerable distraction to myself and other drivers, and the pending failure of the cooling system could lead to unsafe roadside conditions.

- Fort Wayne, IN, USA

problem #4

Apr 012009


  • 52,000 miles
Started hearing a ticking noise coming from under the hood. Took it in to get checked out. Had to replace fan clutch motor at a cost of nearly 500 dollars. 2 weeks later started having crazy speedometer readings.

- Amory, MS, USA

problem #3

Jan 282009


  • 157,500 miles
Since I purchased my 2003 Chevy Trailblazer in Jan 2004, I had it returned twice complaining of a ticking sound from the engine. Local dealer would not address the issue as the noise would come a go..I issued a complaint to the dealer and they got upset but never volunterred to fix the noise.. last month a loud noise came from my engine, like a vacuum sound.. I lost power and was forced to leave the truck at a GM dealership.. they fixed made repairs by replacing the clutch pump. Cots me $900 for repairs. Now 3 weeks later I noticed that the ticking sound from the engine has disappeared.... if the Chevy dealer only addressed this problem a few years ago when I originally complained, I may not had to dish out 900 for repairs.. thank you Chevy! and you wonder why your going out of business.! good riddins!

- Vernon, NJ, USA

problem #2

Jun 232007

Trailblazer 6-cyl

  • Automatic transmission
  • 70,000 miles
I have a high revving sound when my vehicle is about to take off (it only happens on take off, first gear). Then it will go away after it shifts into second gear. I have taken it into the dealer ship to get looked at and they could not do anything because it was not happening at the time. I was fine with that. Two weeks later it starts doing it again and I take it in 2 days after it started doing it again. The day before I take it in the "service engine soon" light comes on. Keep in mind the noise has always happened before the light came on.

- Mckinney, TX, USA

problem #1

Apr 102003

Trailblazer 4WD

  • Automatic transmission
  • miles
I have had several repairs done to my new vehicle. I have had the 2003 Trailblazer for 7 months and it has been in the shop 7 times-2 times for the coolant system-1 time for my master cylinder-3 times for my circuit boards-now for my steering and my starter( I believe my truck is in the shop as I am typing this letter) I have been trying to work with the dealership and GM but no one is trying to replace my truck with something that is not in the shop every month. Thanks.

- Columbus, OH, USA

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