Print this page 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.


really awful
Crashes / Fires:
0 / 1
Injuries / Deaths:
2 / 0
Average Mileage:
76,477 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 fuel system problems

fuel system problem

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2003 Chevrolet Trailblazer Owner Comments (Page 2 of 3)

« Read the previous 20 complaints

problem #37

Sep 042010


  • 80,000 miles


I am filing a complaint.and will continue to file complaints until all of the consumers issues have been addressed. I understand that GM is not willing to hold theirselfs liable for these issues, but people spend pretty pennies out of pocket to purchase vehicles from these manufacturers to spend more money to pay for repairs after just a short while of owning these. I have researched issues I am having with my vehicle, and I am having all the above listed issues, and do not wish to spend large amounts of money to pay for these cost considering I am still paying for this vehicle. I just spoke with a representive about these complaints, and have set up an appoinment to pay a dealership for diagnostics, but am hoping that I can get closure on these issues without paying big expenses. I hope everyone else will follow suit and keep inputting your complaints until they are resolved. My vehicle issues are the fan clutch needs replaced, my gas tank has been replaced already, just replaced my serpintine belt this morning, my exterior lights (brake/turn signal) have been replaced 3 times over two months, and engine light keeps coming on, something doesnt seem right underneath this vehicle either. I just feel like I am paying for a peice of junk on top of paying to keep the vehicle running. Oh yea this vehicle has had to have thousands of dollars of body work done as well thanks to mother nature. I just hope they will be responsible enough to take on this responsibilty of theirs, not ours.

- Gahanna, OH, USA

problem #36

Dec 272010

Trailblazer 6-cyl

  • 136,000 miles
After noticing strong gasoline odors in car and in the garage, the check engine light came on. According to diagnostic test run by dealership, this is the result of a leak in evac system. While researching, noticed other owners having same problem. Called GM, advised no recalls issued for this problem. GM offered no relief. Expressed my disappointment with rep since this problem could lead to very serious consequences thing the problem was caught since could have led to fire had there been an accident or an incinerator nearby. My cost to repair the manufacturers defect is $1600.

- Stockbridge, GA, USA

problem #35

Dec 102010

Trailblazer 4WD 6-cyl

  • 110,848 miles
Ses light checked by dealer, recommend replace gas tank due to emissions leak. Research indicated this is a special policy adjustment tsb# 05012. Vehicle is a 2003 with 110,848 miles. Special policy extension of repairs for 10 years or 150,000 miles not honored by dealer. GM customer assistance center called service request# [xxx]. assistance also denied from GM. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Edmond, OK, USA

problem #34

Oct 182010

Trailblazer 6-cyl

  • 103,085 miles


Service engine light illuminated due to leak in evac system according to diagnostic test. Smoke test showed leak to be at weld where fill spout tube is attached to fuel tank. Gasoline fumes were present were present from the vehicle. Was infonmed that tank would have to be replaced ala cost of $1200. Did some intemet research and found that GM had a tsb addressing this problem (campaign #05012), but it only applied to 2002 ext models. Since this is, in reality, a fire safety issue, I feel GM should also include other models with the same problem regardless of age or milage. Updated 01/20/11

- Westfield, MA, USA

problem #33

Nov 172010

Trailblazer 4WD 6-cyl

  • 140,000 miles
Fuel leak from top of tank, leaking down side, cannot hold much gas without leaking onto the ground.

- Alexandria, IN, USA

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problem #32

Sep 272010


  • 109,000 miles
Fuel neck leaks on gas tank on my 2003 Chevy Trailblazer purchased it from a local dealership on 08/14/10 with 107782 miles on it. We keep it in our garage and (that is also where people go to smoke) shortly after we got it home we noticed a gas smell in the garage so we started looking at it and noticed it. Long story short we took it back to the dealership and they told us the fuel neck was cracked and the purger tank was bad. They tried a silicon on the leak which did not work so they say the tank needs to be replaced. Noticed that others where having the same problem. Called GM to see if they would in any way cover the repair of an known issue, and was told that since I bought it used and it has over a 100,000 miles they would not do anything! now the dealership does not want to do anything, and are mad because I called GM. Then I did a carfax today and notice there is a mileage issue.

- Cookeville, TN, USA

problem #31

Jun 302010


  • 12,500 miles


Filled tank, strong gasoline smell, check engine light came on, took to local GM dealer. Fueltank leaking at filler neck. Would not let me leave, too dangerous!! replaced fuel pump and tank, $2000. Repair!!! GM will not cover because it states it does not cover Texas.

- Weimar, TX, USA

problem #30

Jun 302010


  • 125,000 miles
Fuel tank leaking at filler neck. Leaking gasoline and very strong smell of gasoline. Notified GM after getting fixed. Admitted there is a problem but no recall available for Texas. We were never notified of the problem. Very thankful it did not catch on fire.

- Weimar, TX, USA

problem #29

Jan 202010


  • 94,000 miles
Safety problem with seal where the filler neck meets gas tank. This seal cracks. Gas spills out this seal when fueling and emits a strong gas odor when engine is on or off, more so when car is running. From my research this is a wide spread problem but only ext models are eligible for free replacement but the problem is not limited to ext models. Same defective parts are used on non ext models. Cost to repair is $1400! this is a health concern and fire hazard due to fumes escaping vehicle

- Frisco, TX, USA

problem #28

Oct 282009


  • 81,000 miles
I own a 2003 Chevy Trailblazer ls model. The gas tanks leaks where the filler neck connects to the tank. This is a known issue on 2002,2003 and 2004 models. I asked GM for assistance with the tank replacement ($1400) because this is a well known issue with this vehicle. Request was denied because I don't have a history with GM dealerships as in previous purchases. My VIN number did not fall into the special authorization that was issued in 2007 for this issue.

- Kennedale, TX, USA

problem #27

Aug 102009


  • 88,200 miles


I own a 2003 Chevy Trailblazer V6 ls. I always noted the presence of an odor of gas especially when filling up my vehicle, it grew progressively worse over a two year time frame. Then in July of 2009 the check engine light would come on and go off. I noticed gas dripping from the underside near the gas tank! finally evidence of a leak! a very strong smell of gas and took it to my service garage. The examined the problem and told me I needed a new fuel pump assembly. They repaired it to the tune of $680 dollars. 4 weeks later I was back, still smelling gas. They had to drop the tank again and replace the assembly unit gasket. I think this may be a wide spread problem not just limited to me.

- Fairview, PA, USA

problem #26

Sep 152009


  • 98,000 miles
I have owned a 2003 Chevrolet TB ltz and for the past several months I have been smelling a gas leak somewhere but I could not identify where. Recently I found that it was leaking around the neck of the pump where it was corroded and the seal failed. Now everything work well including the gas pump and I have been reading that this problem has been existing on 2002 Trailblazers and later. My TB has 106,000 miles on it and unfortunately out of the warrantly period but this is definitely a safety issue. I am just glad the truck did not start a fire, especially when my family was in it or it was parked in my attached garage. Has there been any recall on the gas tank. I have never been advised by Chevrolet except for the filler neck which I really don't think was a problem at the time with my TB. Please help!

- Downers Grove, IL, USA

problem #25

Aug 182009


  • 58,341 miles
2003 Chevy Trailblazer check engine light came on. Dealer said the gas tank has a crack in it and is not found to be a recall item. We believe this is a safety issue and should be something the manufacturer should warranty under recall.

- Waco, TX, USA

problem #24

Jun 192009


  • 81,000 miles
Engine service light came on, took vehicle to dealer. I was informed that there was a leak in the gas tank. A crack where the filler tube meets the tank.

- Miami, FL, USA

problem #23

Jun 042009


  • 43,054 miles
Fuel sensor in my 2003 Trailblazer is broken. Dealer wants $800 to fix it. This is a known problem with the Trailblazer. A recall by GM needs to happen.

- Pennellville, NY, USA

problem #22

Mar 192009


  • 185,000 miles
Check engine light came on took it to have it checked and was told there is a crack in the gas tank but Chevy also knew this was a problem because they get alot of them but because the TB has so many miles on it I must foot the bill of 1500 to replace it even though it the gas tank and they knew there were problems with it I was never notified thee was a problem.

- Chandler, AZ, USA

problem #21

Mar 272009


  • 95,000 miles
2003 Trailblazer filler neck on fuel tank cracked, fuel tank is same part number as Trailblazer ext which is under special coverage for same problem, however regular model is not. Cost to replace fuel tank is $900 for oem new product.

- Madison, NJ, USA

problem #20

Feb 252008


  • 75,000 miles
The contact owns a 2003 Chevrolet Trailblazer. While driving approximately 40 mph on normal road conditions, the check engine warning indicator illuminated on the instrument panel and remained lit until the engine was turned off. In addition, the contact noticed a small amount of fuel leakage whenever the fuel tank was filled to capacity. The driver fills the fuel tank halfway in order to avoid leakage. The vehicle was taken to an authorized dealer for diagnostic testing and they stated that the failure was related to a hole in the fuel tank. The vehicle was taken to an independent mechanic for a second opinion and the same failure was confirmed. The vehicle has not been repaired. The failure mileage was 75,000 and current mileage was 107,000.

- Texas City, TX, USA

problem #19

Feb 232009


  • miles
Smell of gas. Took to mechanic and found the fuel tank is leaking where the filler tube goes into the tank causing the service engine light to come on.

- Huntersville, NC, USA

problem #18

Feb 102009


  • 79,500 miles
The contact owns a 2003 Chevrolet Trailblazer. While driving 20 mph, smoke appeared under the hood of the vehicle and entered through the defrost vents. The flames spread through the hood and then underneath the vehicle. The fire department extinguished the fire and stated that the fuel injector was the cause of the failure. The vehicle was towed to a repair shop and they stated that the vehicle was destroyed. A police report was filed. The contact wanted to know what caused the fire. There is a recall for the faulty fuel injector for the 2002 models, but the 2003 models were not included. The current and failure mileages were 79,500.

- Meadville , PA, USA

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