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: It would be ill-advised to blaze any trails with the 2004 Trailblazer. Its faulty fuel gauge could leave you stranded.


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
404,859 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 fuel system problems

fuel system problem

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2004 Chevrolet Trailblazer Owner Comments (Page 1 of 2)

problem #32

Nov 212016


  • 155,000 miles


Let me begin with stating that my 2004 Trailblazer has had its service engine soon (ses) light on for well over a year due to a large evap leak (code P0455). As a result, I have taken it to two mechanics, had the purge solenoid valve replaced twice, had a plethora of smoke tests and all other tests done, with no resolve. I received a letter from GM (dated a year before) just a couple weeks ago stating that "some 2004 model year Chevrolet Trailblazer vehicles may contain a fuel tank inlet check valve (icv) that could fracture.. a fractured icv could allow fuel vapors to pass through and droplets of fuel to accumulate on the side of the fuel tank". the letter goes on to describe that GM will repair the icv if the condition occurs within 15 years the vehicle was originally placed in service or 150,000 miles, whichever comes first. My Trailblazer has been in service for 12 years, however I just passed 155,000 miles. Had I been notified around the time the letter was supposed to arrive, I could have easily taken my Trailblazer to the dealership and had this repair done with no qualms. However, because I have passed the 150,000 mile mark, GM refuses to cover this repair. This is extremely upsetting considering the obvious safety risk presented with "droplets of fuel accumulating on the side of the fuel tank". when speaking to a GM representative this morning, I was told to take my car to a dealership and this would be an out-of-pocket expense. Considering the safety issue, I want my Trailblazer to be repaired and covered by GM as it should be for all Trailblazer and Envoy owners with this problem.

- Fontana, CA, USA

problem #31

Jun 022016


  • 46,500 miles
The contact owns a 2004 Chevrolet Trailblazer. When the vehicle was started, a strong odor of fuel was present. The vehicle was driven to the dealer where it was diagnosed that there was a failure with the fuel tank. The vehicle was kept at the dealer for four weeks. The dealer stated that the part needed to repair the vehicle was not available and needed to be ordered. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 46,500....updated 07/13/16.....updated 08/11/16

- Moreno Valley, CA, USA

problem #30

Feb 182016


  • 131,000 miles
My vehicle is in the GM special coverage adjustment program number 07099 and is under the GM spl coverage pgm update 14423. I was notified that the icv could fracture and create an 'engine service soon' light. That light was activated in February. I took it in, it's the icv. They said they'd replace the fuel tank as soon as they could get parts. They still don't have the replacement -- and say it could be may or June. Meanwhile the 'check engine' light could be on for icv -- or it could be another problem. With dripping fuel out in the open, it's a safety hazard -can't be used on a trip and can't be sold/traded as it's defective.

- Topeka, KS, USA

problem #29

Feb 132016


  • 104,000 miles


Gas leaking at fuel pressure regulator at 15 degrees F. smell of gas fumes in truck lead me to investigate problem. Car was not moving. Used remote start on cold day, got in truck and smell fumes @ 10am Saturday morning. Full daylight, saw gas comming from seal of part, fuel pressure regulator.

- Lexington, KY, USA

problem #28

Jul 012015


  • 165,000 miles
The contact owns a 2004 Chevrolet Trailblazer. The contact stated that there was an odor of fuel was present inside and outside the vehicle. The vehicle was taken to the dealer, who diagnosed that the fuel pump and the fuel lines were damaged which were caused by a faulty inlet check valve. The vehicle was not repaired. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 165,000.

- Myrtle Beach, SC, USA

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problem #27

May 212014


  • miles
In 2014 I noticed a strong odor of gasoline on a regular basis coming from my 2004 Chevy Trailblazer. I had my local garage look at it and was told the fuel tank assembly was compromised and needed to be replaced. Mileage at the time of repair was 124,000 and cost was almost $800 parts & labor. Looking online I noticed many other owners of the same make/model dealing with this issue.

- Wolfeboro, NH, USA

problem #26

Sep 152014


  • 134,000 miles


The contact owns a 2004 Chevrolet Trailblazer. While the vehicle was parked, it had a strong odor of fuel fumes and the check engine warning light illuminated. The contact stated that there were also a few drops of fuel on the garage floor under the vehicle. The vehicle was taken to a dealer where it could not be diagnosed. The manufacturer was made aware of the failure. The failure mileage was 134,000.

- Austell, GA, USA

problem #25

Dec 012015


  • 150,300 miles
The contact owns a 2004 Chevrolet Trailblazer. The contact stated that the vehicle emitted a strong fuel odor while driving and the check engine warning light remained illuminated. The vehicle was taken to the dealer where it was diagnosed that there was a leak code at the evaporation system. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 150,300.

- Holbrook, MA, USA

problem #24

Dec 072015


  • miles
Envian un recall cuando ya la garantia SE acabo Y ahora no quieren honrarla aun cuando ES un problema de gasolina por ende de seguridad.

- Catano, PR, USA

problem #23

May 022011


  • miles
The contact owns a 2004 Chevrolet Trailblazer. While the vehicle was parked, the contact noticed strong fuel fumes outside the vehicle. Upon inspection, the contact noticed that there was fuel leaking from the fuel tank. The vehicle was taken to an independent mechanic who diagnosed that the fuel tank needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was unknown.

- King, NC, USA

problem #22

Nov 262015


  • 151,872 miles


On November 19, 2015, I received a letter from Chevrolet, P.O. Box 909989, milwaukee, wi 53209-9989, dated November 2015, notifying me, "this letter is intended to make you aware that some 2004 model year Chevrolet Trailblazer vehicles may contain a fuel tank inlet check valve (icv) that could fracture." I immediately called the 1-800-222-1020 phone number included in the letter and the gentlemen I spoke with called my nearest Chevrolet dealer, nimnicht Chevrolet, jacksonville, Florida, and asked them to call me to set up an appointment to have the situation investigated. They did not call me and the following day, the representative from Chevrolet called back to confirm that I had an appointment with nimnicht and I informed him they had not called. He immediately called them back and got an appointment set up for me, which was not until the following Wednesday, November 26, at 8:00 a.M. I took my vehicle in, which has all of the symptoms listed, I.e. gasoline smell, ses light on solid for a while, then begins blinking, and will go back to solid, terrible gas mileage and when sitting still with engine running, engine acts as if it wants to shut off. Within ten minutes of my arriving at the dealership, I was informed there was nothing they could do since my mileage was over 150,000. The date I received the letter, the mileage was 151,872 and by the time I got an appointment, it was 152,000 plus. After letting me sit in their waiting room, and my asking them to please call Chevrolet to see if some type of exception could be made, the lady came back and offered me a "real deal" of $903 to repair it. She told me they were not allowed to call Chevrolet on a customer's behalf. My complaint is that, if the letter were mailed to me on November 1, the vehicle would have been less than 150,000 miles. I feel they should have to repair it. It is dangerous to drive.

- Jacksonville, FL, USA

problem #21

Jul 112014


  • 110,000 miles
The contact owns a 2004 Chevrolet Trailblazer. The contact stated that there was an abnormal fuel odor in the vehicle.the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 110,000.

- Junction City, KS, USA

problem #20

Aug 032015


  • 155,000 miles
The metallic fuel pump lines located on top of the fuel pump corroded through, leaking gas onto the ground whenever the engine was on. This vehicle has 155,000 miles on it and is now 11 years old. To qualify for the recall that was issued, the car had to be less than 10 years old or and have less than 125,000 miles. The recall period for this vehicle should be extended to include older vehicles.

- Alto, MI, USA

problem #19

Dec 172014

Trailblazer 4WD 6-cyl

  • 143,000 miles
Smelled gas and noticed puddle under vehicle when parked. Checked online and found this seems to be a common problem for this vehicle and was worried because this seems to be a safety issue. Contacted Chevrolet about it and was told to take to dealer to have inspected for any damage to vehicle. I was charged $49.73 to be told that I had a fuel leak and to repair it I would be charged $1897 even though Chevrolet has issued a service bulletin #05012 for this very issue and that it can be repaired for no charge but they would only cover for 10 yrs. Or 120,000 miles. But since I am a little over on both items they will cover nothing and want me to pay the entire amount to which I feel this is very unfair as this is a common issue with this vehicle and miles should not be an issue for a defective part and since this is a safety issue.

- Poynette, WI, USA

problem #18

Sep 012014

Trailblazer 6-cyl

  • 98,000 miles
I started smelling gas fumes inside of vehicle. I thought it was just sensor or gas cap letting fumes out. I took my vehicle in to get repaired and was told there was a crack in neck on fuel tank and leaking fuel. The cost of replacing the fuel tank was $1390. I also looked up to see if there had been others that had the same problem and they were with most all vehicles under a 100,000 miles. I called GM and was told there was never a recall issued on this. I think their should have been a recall since this was a serious safety hazard.

- Alexandria, LA, USA

problem #17

Nov 042014

Trailblazer 6-cyl

  • 9,899,410 miles
Smell gas from interior A/C vents and outside of vehicle on drivers side.

- Ocala, FL, USA

problem #16

Oct 152014


  • 96,000 miles
My vehicle is sending gas fumes in thru the vent system. I have read online that this has happened to several 2004 Trailblazers. The outcome is faulty fuel tank modular reservoir assembly or hole in tank. As of now there is no recall. I will be bringing the vehicle into my dealership soon to get the problem fixed however, I feel if this has happened to several other vehicles it should be part of a national recall. I searched online under Chevy Trailblazer 2004 fuel smell thru vent. I hope that something will be addressed on this before someone gets killed either by fumes or possible explosion. The affected parts is not correct however I had to select something to get this to process.

- Lacombe, LA, USA

problem #15

Oct 162014

Trailblazer 4WD 6-cyl

  • 145,000 miles
Significant, significant gas oder by driver's rear wheel. Can smell some gas while inside vehicle but most notable when outside of vehicle near driver's rear wheel.

- Morgantown, WV, USA

problem #14

Jun 102014

Trailblazer 4WD 6-cyl

  • 102,000 miles
Fuel tank crack the check engine light came on with a vapor leak error and I smelled a slight gas vapor. I took it to my mechanic and he could not identify the source of the vapor leak. After a couple of months, the gas smell became more noticeable and I took it back to my mechanic. A smoke test revealed that the fuel tank is cracked where the fuel tank filler hose is connected to the tank. Although other Chevy are covered under recall for this problem, the 2004 Trailblazer is not. The tank alone is $790 to replace not including labor of about $150 at my mechanic. I have read many other complaints about this issue for this car and believe that there should be a recall. [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Atlanta, GA, USA

problem #13

May 022014

Trailblazer 4WD 6-cyl

  • 49,000 miles
While driving fuel level gauge jumps up and down from empty to full. It stays at what ever level it wants to. You cannot be certain how much fuel is in gas tank at any certain time!

- Cheektowaga, NY, USA

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