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.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
34,530 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 #19

Nov 012010


  • miles


2003 Chevy Trailblazer. Consumer states problems with fan clutch the consumer stated once the RPM went up, the fan clutch would disengage and then sound normal. The fan clutch has been replaced twice.

- Washington, DC, USA

problem #18

Jun 062008


  • 78,903 miles
The contact owns a 2003 Chevrolet Trailblazer. The contact stated that the fan clutch was failing and sounded like a plane taking off when pressure was applied to the accelerator pedal. She first noticed the failure in July of 2008. The vehicle was taken to a mechanic, who stated that this was a common complaint for this type of vehicle. The mechanic repaired the vehicle for $710.68 at the contact's expense. The manufacturer stated that there were no recalls and could only make a note of the failures. The failure mileage was 78903 and current mileage is 94,000. Updated 09/18/09. The consumer stated even though the fan clutch was repaired, it continues to make sounds. Updated 09/21/09.

- Lee Summit, MO, USA

problem #17

Mar 222008

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 70,804 miles
For approx. 2 years there had been a constant ticking when my 2003 Chevrolet Trailblazer was running. Questions about the noise was dismissed by the service technicians as normal. Finally on 3/22/08 my fan clutch failed causing an overheat problem and a constant loud noise, along with a service engine light. Upon investigating this issue I found literally thousands of complaints on the internet regarding the Chevrolet Trailblazer and its premature fan clutch failures. To correct the failure I had to incur the $724 repair.

- Delran, NJ, USA

problem #16

Dec 152007

Trailblazer 6-cyl

  • Automatic transmission
  • 48,000 miles


Bad clutch fan again!!!

- Bonita Springs, FL, USA

problem #15

Nov 282007

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 64 miles
2003 Chevrolet Trailblazer.

- Memphis , TN, USA

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problem #14

Oct 262007

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 54,000 miles
I bought my 2003 Trailblazer 4X4 in July 06 and had to replace the airbag module 1 month later (54,000mi on odometer) for $350. That was at half price because I had a 50/50 warranty luckily. Now late in September my fan is on every time I start my engine, hot or cold. Like everyone else with my vehicle make and year states that it sounds like a jet plane and turns off a couple off miles down the road and then eventually fails later. GM needs to pay my out-of-pocket expense for my airbag module and fix my fan clutch issue before it fails completely, leaving me stranded somewhere in an unsafe environment. I always keep up to date on my vehicles to make sure I get the most out of them and do not expect random parts to fail prematurely. I'll be ?!@#$% if I am going to pay $600-$1000 to have this fixed after it fully fails to work.

- Sanford, FL, USA

problem #13

Oct 102007

Trailblazer 6-cyl

  • Automatic transmission
  • miles


03 Trailblazer fan clutch failure at 48,000 miles. Lots of same issue complaints on several car sites. This should result in a GM recall.

- Grand Prairie, TX, USA

problem #12

Aug 312007

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 50,080 miles
My truck has been driving average, with prior issues of the truck sounding like it is struggling to accelerate. This weekend, it began sounding like it is struggling to accelerate. Because of this, I had to drive below the speed limit for over 50 miles for fear of my truck blowing up. After taking my truck to the dealership, the problem is the fan clutch. After going online, I observed that there are thousands of people who have had the same issue with Trailblazers from 2002-2007. But to no avail, I cannot find any recalls from Chevrolet about their many faulty parts. I am supposed to pay $900 to repair something that should be recalled from Chevy" where is the justice" I am a family member of 3 generations of GM employees, and I am truly disappointed in Chevrolet.

- Lincoln, NE, USA

problem #11

Dec 012005

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 43,508 miles
Fan clutch failure on my 2003 Chevy Trailblazer car "roars" as the fan does not disengage and experience loss of acceleration.

- Cumming, GA, USA

problem #10

Jul 022007

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 49,890 miles
I brought my 2003 Trailblazer in for service to my GM dealer while still under warranty for a ticking noise. The noise is intermittent and the periodic rate is constant regardless of engine speed RPM's. I now have 50K miles and the fan clutch motor failed and operated at 100%.through research online, the ticking sound is directly related to the fan clutch failure many GM Trailblazer and Envoy owners have experienced. The fan operates at 100% due to the fan clutch failing resulting in loss of power. I too have experienced what is described by many as the "lear jet" sound. The sudden loss of power at high speeds in my opinion is as safety concern and GM should recall this defective fan clutch motor. Customers with my 2002 and above have complained on several websites on this issue.

- Taylor, MI, USA

problem #9

Feb 152007


  • miles


2003 Chevrolet Trailblazer mechanical problems due to fan clutch defect. ***

- Garden Grove, CA, USA

problem #8

Aug 302006

Trailblazer 6-cyl

  • Automatic transmission
  • 40,000 miles
Engine kept making this very load roaring noise. Had to get the clutch fan replaced like many other Trailblazer owners. GM needs to recall this part!

- Scottsdale, AZ, USA

problem #7

Mar 082007

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 45,624 miles
Ev cooling fan runs at a high rate of speed and does not disengage for serveral minutes while driving. The vehicle does not shift properly during this period of time. Since I am unable to get up to highway speeds, I feel I am a safety hazard to other drivers that must slow down until they can pass or I get up to proper highway speeds. I will be replacing this component at the dealer they gave me the following estimate: Part cost $350 and labor cost $300. I will be asking for the old component. This problem began occuring without any warning. One morning it just began operating at a high rate when I started my vehicle and as stated, continued for serveral minutes.

- Lagrange, IN, USA

problem #6

Jan 022007

Trailblazer 6-cyl

  • Automatic transmission
  • 64,900 miles
The engine fan clutch failed on my 2003 Chevy Trailblazer the truck is only three years old with 65000 miles on it. I was told that GM has change this part several times to try to fix the problem I think there should be a recall on this part as the cost was about $630 dollars to have it repaired.

- Beaumont, TX, USA

problem #5

Dec 142006

Trailblazer 6-cyl

  • Automatic transmission
  • 75,000 miles
Fan clutch failed on vehicle that is only 3 years old. I have searched for info on this on the internet & have found page after page after page of other people having the exact same problem, all have had to pay $600-$1000 to fix the issue that seems to be very common on 2002-2004 Chevrolet Trailblazers. This needs to be a recall issue that Chevrolet fixes without charging its customers!!!

- Fort Worth, TX, USA

problem #4

Nov 182006

Trailblazer 6-cyl

  • Automatic transmission
  • miles
Transmission failure. I own a 2003 Trailblazer and have had numerous problems with it. They have replaced 4 fan clutches, 3 computers, transmission just had its 2nd overhaul and numerous other little items. This vehicle only has 66,400 miles on it and I bought it brand new.

- Jacksonville, FL, USA

problem #3

Jan 172003


  • miles
Engine fan clutch is making a loud roaring noise (2003 GMC truck).

- Baxley, GA, USA

problem #2

Jan 162005

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 35,300 miles
Fan clutch failed in near full on mode causing excessive air flow when during winter season. After approximately 20 miles highway travel attempting to return from a vacation the "service engine soon" indicator illuminated. Readout of this error was P0495 fan speed high.

- Wappingers Falls, NY, USA

problem #1

Oct 192003

Trailblazer 6-cyl

  • Automatic transmission
  • miles
Since I bought this vehicle August 30, 2002 I have had to bring it back to the dealership on numerous occasions for several different items. I have had both the left and right brake lights gone out, the driver side head lamp went out, the air conditioner has gone out twice(four months apart), the driver side passenger window is inoperable(we have tried to get it fixed for almost a month now with no success) and the engine cooling fan was warped and the fan clutch malfunctioned. At this point we don't understand why they haven't just recalled the whole vehicle. Luckily we have the 36,000 mile warranty still in affect but what's going to happen when it is up and the same problems keep recurring?

- Gonzales, LA, USA

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