hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
54,729 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 fuel system problems

fuel system problem

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2003 Chevrolet Trailblazer EXT Owner Comments

problem #15

Jul 212012

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 185,000 miles


The contact owns a 2003 Chevrolet Trailblazer ext. The contact stated there was a massive fuel leak coming from under the vehicle. The contact noticed the leak as the vehicle was idling. The contact turned the vehicle off and had it towed to the dealer. The contact stated that the vehicle was at the dealer but he had not spoken with the dealer to determine the diagnosis of the failure. The manufacturer was notified who advised that when the dealer inspected the vehicle, then they would contact him. The contact filed a complaint with the manufacturer. The VIN was unknown. The failure mileage was 185,000. The consumer stated the fuel tank, fuel mount, and fuel lines were all replaced for $2000. If the vehicle had set on fire it would have exploded under the driver's seat. Updated 08/20/2012

- Shipbottom, NJ, USA

problem #14

May 102011

Trailblazer EXT 4WD 6-cyl

  • 48,400 miles
Fuel system, other:delivery:hoses, lines/piping, and fittings fuel system, gasoline:storage:tank assembly.

- Bronx, NY, USA

problem #13

Mar 242008

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 87,000 miles
I detected a strong gas smell and took the truck to be repaired. I was informed that the fuel pump module was leaking due to being rusted out. I took it to the dealership (jeff wyler). They agreed to cover the repair of the gas tank and the labor (due to a special warranty due to other fuel leak problems), but would not cover the cost ( $454 + tax) which was the part that was the cause of the problem. The assembly of this part is unpainted medal and rusts very easily (most other company use plastic assembles to prevent this very problem). The location of this part makes it almost impossible to wash, in order to remove any salt or other corrosive elements. I do not see a way that I could have prevented the rusting of this part. I believe this is a design defect that Chevy should have to correct, due to the fact that it could have very easily cause a fire to the vehicle due to the amount of fuel/vapor leaking.

- Springfield, OH, USA

problem #12

Jul 192007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 83,000 miles


The contact owns a 2003 Chevrolet Trailblazer ext. The contact stated that he smells gas fumes while driving the vehicle. While pumping gas, the contact noticed fuel leaking. The manufacturer sent a technical service bulletin for an icv fracture and stated that the fuel tank would be replaced. The dealer refused to replace the tank. The current and failure mileages were 83,000.

- Glenwood , NJ, USA

problem #11

Jun 012007

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 85,572 miles
I have a 2003 Chevrolet Trailblazer ext. The "service engine soon" light came on. I took it in to a Chevrolet dealership. It was found that the gas tank was leaking gas and the tank would not hold pressure thus causing the light to come on. The tank was leaking where the filler neck attaches to the tank. The dealership service director stated that the the crack was clearly a defect and was not caused by damage or misuse. Because the vehicle was out of warranty he stated the repair would be at my expense and would be approximately $750-$800. I phoned Chevrolet customer assistance and filed a complaint. After they communicated with the Chevrolet district service rep. They concluded that GM warranty would not pay for the repairs, even despite the danger and liability involved. They did suggest that if the dealership would approve, to have them do it at the dealership cost. The GM customer assistance rep stated that my only other form of arbitration was through the better business bureau. As of this date the repairs have not been made. I have found quite a number of trailblazer owners on the internet who have had the same problem and have had to pay to have the repair made out of pocket.

- Eastman, GA, USA

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problem #10

May 102007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 39,668 miles
2003 Chevy Trailblazer ext has crack where fuel filler neck meets the fuel tank. It causes dtc P0440 to be set, ses light to illuminate and fuel to leak from fuel tank.

- Fairfield, PA, USA

problem #9

Feb 242007

Trailblazer EXT 6-cyl

  • Automatic transmission
  • miles


I own a 2003 Chevrolet trailblazer w/ 69016 miles. My service engine soon light came on so I took it into bill heard Chevrolet where the veh was purchased to check the reason for the light. I was advised by the service manager that this was due to a leak in the gas tank and that the repair would cost approximately $1000. I took the vehicle home to have a second opinion done and do further research on the problem. I have found doing a google search that this is a common issue with the 2002-2005 chevr trailblazer. So I contacted the dealership and they stated that their have been no recalls and that GM is not anticipating to have one. This is a fire hazard and major safety issue. How can this not be recalled?

- Plant City , FL, USA

problem #8

Feb 042007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 79,000 miles
Fuel leak and strong fuel odor from left rear filler neck area. My vehicle started having this problem a few days ago and a quick internet search turned up lots of other people with the same problem. There is a great risk of fire with potential for injury/death and of course property damage. This vehicle should be recalled asap! email update (February 07, 2007): The leak is from the fuel pump/fuel sender module that enters the tank. An epoxy repair was made. We are in the process of trading this vehicle in. We live in upstate NY where a great deal of salt is used in winter. It seems the design of this tank allows a brine solution to sit in a recess where the fuel pump/sender module lives and corrodes the components. From my internet research I found a lot of people with similar reports of this issue. It is extremely dangerous, especially if the vehicle is garaged.

- Ticonderoga, NY, USA

problem #7

Jan 242007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 62,000 miles
1) there was a strong odor of fuel coming from in and around the vehicle 2)the lines on top of the fuel tank on the fuel sending unit were rotted after 60K miles 3)the fuel sending unit and the lines were replaced ($900 dollars total).

- Clinton, NY, USA

problem #6

Jan 172007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 26,521 miles
- the contact stated that while attempting to put gas into his 2003 Chevrolet trailblazer (failed mileage 26521) the gas would not enter the tank. The gas would spill back out onto the ground. The contact attempted twice more with the same results. The contact took the vehicle to the dealer and the dealer informed him that the problem was with the hose and the fuel filter. The contact is having the same problem as service bulletin number 040604003.

- Lancaster, SC, USA

problem #5

Dec 272006

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 19,300 miles


I have a 2003 Chevy Trailblazer ext, which also has a leak in the plastic gas tank. It was detected in the garage by the strong odor. I was told by the mechanic today that this is not uncommon for this model. The plastic break is where the neck is molded into the tank. Very dangerous situation, considering many homes, as ours, has the water heater in the garage.

- Elko, NV, USA

problem #4

Aug 142006

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • miles
I own a 2003 Chevy trailblazer. A month after we purchased it we found out the vehicle leaks fuel when on a driveway incline. The check engine light came on and I took the vehicle to a mechanic. They said it was code on P0440 -evap leak small. When they checked it out they found a crack around filler neck of gas tank. They said there was already a tech service bulletin that said a small crack occurs above fluid level. Gas tank needs to be replaced. I called a dealership and apparently these gas tanks are hard to come by because they are back ordered due to this being so common on this vehicle.

- Colorado Springs, CO, USA

problem #3

May 112006

Trailblazer EXT

  • Automatic transmission
  • miles
2003 Chevy trailblazer blew a few fuses so I could not start the vehicle (several times already), per dealer. Tachometer jumps around, radio gets hot, electrical lights turn off along with heater/cooler, rear lights replaced three times, hole in gas tank, drive line replaced, constant chirping/ticking noise (of course dealer does not hear). Purchased brand new and have way too many problems for a new vehicle. You asked for incident date....there are several. Will stick to Toyota's from now on....

- Fair Oaks, CA, USA

problem #2

Oct 152005

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 50,467 miles
The gas tank had a manufacture defect as the weld on the tank cracked and was leaking.

- Orange Park, FL, USA

problem #1

Nov 142004

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 55,000 miles
Service engine light came on immediately after filling tank with gas. Took to mechanic and they tightened the gas cap and then reset the service engine light and drove around and no light came on. Three days later the service engine soon light came on again. Took back to mechanic and they ran more diagnostics and found three crack S in the opening (neck) of the gas tank. I had to have the tank replaced in order for the vehicle to function without the service engine light to come on. A new gas tank on a 2003 vehicle is unheard of and I wonder how many other gas tanks on 2003 Chevy trailblazers or other GM vehicles have had to replaced due to this same problem??

- Hoschton, GA, USA

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