definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
46,555 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 #13

Aug 132007

Trailblazer EXT 4WD 8-cyl

  • Automatic transmission
  • 75,000 miles


2003 Chevy Trailblazer ext. Service engine light went on about a month ago. Service at dealership said we needed a new gas cap. Replaced gas cap and light came back on. Continuous smell of gas within the cabin and outside. Can't fill tank all the way or smell gets wore. Can't park in garage fear of gas build up and explosion.

- Greenwood, MO, USA

problem #12

Oct 062007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 89,500 miles
Gas tank leak on my 2003 Trailblazer ext, found a leak from my gas tank.

- Washington, IN, USA

problem #11

Jun 012007

Trailblazer EXT

  • Automatic transmission
  • 17,000 miles
I have a 2003 Trailblazer ext. Just got it from my in-laws, only 21K miles on it. Gasoline vents on the ground when filling the tank full. The check engine light remains illuminated. I counted more than 20 complaints just like mine on the NHTSA complaint list. Example ODI id numbers are 10191706, 10190967, 10188345, 10187405, 10186556, 10185694, 10184336, 10183773, 10182724, 10182384, etc. I assume it is a cracked filler neck. I called GM customer service. They seemed helpful and gave me a case number, but advised me to go to a GM dealer for an official diagnosis before they can proceed with helping me further. No promises at this time. I assume I'll have to pay for the diagnosis. This is a dangerous malfunction, it causes fumes, odors, and puddles of gasoline beneath hot vehicles.

- Baytown, TX, USA

problem #10

Apr 122007

Trailblazer EXT 4WD 8-cyl

  • Automatic transmission
  • miles


2003 Chevrolet Trailblazer ext leaking fuel at filler neck/fuel tank. Check engine light continued to come on with variations in duration after reset. Code indicated small fuel leak. Strong odor of fuel surrounding vehicle, and sometimes came inside of vehicle after fill up. Finally, discovered leak after completely filling tank and parking on hill. Gas poured out.

- Stafford, VA, USA

problem #9

Mar 052007

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 36,899 miles
My 2003 Chevy Trailblazer ext, check engine light came on. Took it into the dealer and said the code it was putting out was P0440 evap leak small. After further investigation there is a small fracture on the gas tank where the filler neck meets the tank itself. I have read of many similar problems of 2002 and 2003 trailblazers. This seems to be a safety hazard. Although they said no fuel was leaking out of ours, it was leaking vapor. Vapor seems more dangerous than an actual fuel leak.

- Southaven, MS, USA

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problem #8

Feb 152007

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 61,000 miles
Fuel filler neck on gas tank on 2003 Trailblazer ext with 61000 miles is cracked and leaking gas. Plastic fuel tank needs replacement cost close to $1000 to replace tank. Researched on internet and found several incidents and similar issues with the plastic fuel tank.

- Tampa, FL, USA

problem #7

Feb 052007

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 38,000 miles


- on February 5, 2007 the 2003 Chevrolet Trailblazer ext's service light turned on. The contact took the vehicle to desert Pontiac GMC in henderson, Nevada. The service mechanic informed the contact that there was a fuel filter cap and fuel filter hose vapor leak, no visible gasoline leaked at this time. The vehicle was out of warranty. The cost of the repair was $900. The contact wanted to file a complaint since there seems to be service bulletin #20050577, and NHTSA items #10141760, #10149536, in which Chevrolet acknowledges there is a problem with this vehicle. The current and failure mileage were both 38000 miles.

- Henderson, NV, USA

problem #6

Nov 212006

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 82,000 miles
My wife and I have been smelling gas outside and with our 2003 Chevy Trailblazer ext. I brought it to my mechanic and he found a split at the top of the fuel tank (neck filler plate). I called the Chevy number and brought the vehicle to croton auto park. They found the same problem and said it would cost my over $750 to replace the tank. I view this issue to be a manufactures defect and escalated the matter to Chevy. They are offering a 50% rebate to fix. I don't believe I should pay for this defect. I have researched the issue and found more people that had the same problem with their Chevy trailblazer (same model and year). Refer to web site: www.topix.net/forum/autos/Chevrolet-trailblazer/tc82da8F4uejoj6vf/P2#lastpost. I am waiting on Chevrolet's decision as to who is going to pay for this. I cannot drive this automobile in its current condition out of extreme fear of fire and explosion!!!!!!! please feel free to call me for more details.

- Tomkins Cove, NY, USA

problem #5

Oct 012006

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 53,000 miles
My 2003 trail Blazer check engine light was on so I took it in to see why it was on. The mechanic replaced the gas cap reset the engine light and sent me off. Two days later, it came back on so I took it back. This time they replaced a solenoid and reset the check engine light. One day later it can back on. Tires care plus stated to take it to the Chevy dealer because they did not know what to do with it. I took it to the dealer and they stated it was a fuel filter fitting leak and that the entire gas tank and fuel hose needed to be replaced at a cost of $1000. I opted not to have it fixed so they sent me home with no warning or further explanation. I went home and did some research on the internet about this problem. As it turns out, there have been numerous complaints about the fuel filter filling breaking from the fuel tank. Four days later, I went to fill up my car with gas and all the gas ran out of the car all over the pavement. I called the Chevy dealer, stated what happened and had it repaired for $1000 (the entire gas tank and fuel fitting on a 2003 car!). from what research I have done, the 2002 trailblazer have been recalled but the 2003 have not and Chevy has not redesigned the tank. There was a lady that had to replace her tank twice! is this not a hazard? I kept smelling gas outside my car but assumed that it was because I had overfilled the tank.

- Jacksonville, FL, USA

problem #4

Aug 152006

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 42,683 miles
Ses light came on. Gas cap replaced. Ses light came on again after fill up and 1/4 tank of gas used. Clamps tightened on filler tube. Ses light came on again after fill up and 1/4 tank of gas used. Went to dealer, replace vent valve in filler tube on Monday. Tuesday morning filled up with gas. Gas was leaking out on the ground and all over my feet. Brought back to dealer, they said the seal on the filler pipe entering the tank had deterioated because of the chemicals in the gasoline, and that was the reason for the break. I do not believe that because the week before the repair I filled the tank & it did not leak, the day after the repair I filled the tank and discovered the hazardous leak. The dealer disclaimed all liability for the broken filler tube at the gas tank. I consider this an extreme safety hazard and the manufacturer should recall all Chevrolet trail-Blazer with this type of vent and filler tube problem, because when I looked at my tank there was another tank in the garbage pile with the same failure. There was no fire because I exited the site immediately to prevent a spark from igniting the spilled fuel.

- Wheaton, IL, USA

problem #3

Jul 162006

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 20,000 miles


When filling the gas tank, frequently the pump clicks off and gas surges up the filler neck and flows to the ground. Happens at different gas stations and different pumps.

- Yorktown Heights, NY, USA

problem #2

Feb 042006

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 41,000 miles
2003 Chevy Trailblazer ext. Service engine light went on about a month ago. Service at dealership said we needed a new gas cap. This did not fix the problem. Light went back on, took it back this past Saturday. Was told gooseneck to gas tank is cracked, resulting in a fuel leak (I have an infant). Was also told that the trailblazers often come in for that problem, that there was a recall. The dealership wants over $700 to replace the tank. We have a new baby and are down to only one household income. I called Chevrolet this morning and was told that there is a recall for this exact problem but that my VIN is not on their list si I must have "run something over" that cracked the gooseneck. I don't know much about cars but I know something being run over would not make it to the gooseneck. Chevy admitted this defect to me- just because my VIN did not make their list (allegedly) does not mean that it should not be on it. It would cost them more, in my opinion, in law suits and negative publicity if, god forbid, my family dies in an explosion because this truck blows up in the driveway than it would if they would include my VIN on their list and pay for their defect.

- Dallas, GA, USA

problem #1

Nov 022005

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 49,130 miles
The contact discovered a small crack along the neck of the gas tank allowing visible leakage when filling up with gasoline or while driving. He took the vehicle to a dealer. The dealer confirmed there was a leak on the filler pipe of the gasoline storage tank assembly. Due to the mileage this was not covered under warranty. The dealer did however offer cost assistance by splitting the repair cost. No repairs have been made at this time. Updated 11/30/2005 -

- Rocky Hill, CT, USA

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