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hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
48,316 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 #11

Mar 012008

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 69,000 miles


I recently had my fuel tank replace now I hear knocking and I understand that the fuel pump have been damage because of this. GMC needs to look into this as a recall.

- Hephzibah, GA, USA

problem #10

Oct 152007

Trailblazer EXT 4WD 8-cyl

  • Automatic transmission
  • 46,000 miles
2003 Chevy Trailblazer ext ? smelled gas, no visual sign of leaking, smell got continuously worse and could smell in the cabin. Then you could see gas dripping from the tank. Had to have the fuel sending unit replaced. This is a very serious problem and we were fortunate that no one got hurt. Feel this is a poor design for the vehicle and it should be recalled before someone gets seriously hurt or killed. This failure occurred around 46,000 miles.

- Schoharie, NY, USA

problem #9

Dec 072007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 60,000 miles
The contact owns a 2003 Chevrolet Trailblazer ext. The contact smelled fuel inside the passenger compartment when the engine was started. There were no warning lights. The dealer stated that there was a fuel leak from the fuel sending unit. The failure was caused by a cracked and corroded line. The fuel pump module was replaced. The current and failure mileages were 60,000. Updated 03-05-08

- Scotia , NY, USA

problem #8

Nov 202007

Trailblazer EXT 4WD 8-cyl

  • Automatic transmission
  • miles


Fuel tank sending unit lines corroded and leaking.

- Albion, NY, USA

problem #7

Feb 042007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 52,000 miles
2003 chev trailblazer 52,000 miles. Fuel spraying from under the vehicle when it is running. Diagnosed as fuel pump housing corroded. Complaint filed with Chevrolet for warranty replacement. Request denied, had pump replaced at local shop. Did not keep old part, can get affidavit from repair shop.

- Baraboo, WI, USA

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problem #6

Aug 212006

Trailblazer EXT 4WD 8-cyl

  • Automatic transmission
  • 53,213 miles
Smell of fuel after driving. Fuel leaking in vicininty of gas tank onto driveway. Brought 2003 trailblazer for servicing. Fuel pump was leaking fuel where connected to sending unit. Fuel pump replaced. Original sending unit transferred onto new pump. Parts cost $500 and labor $180.

- Massena, NY, USA

problem #5

Mar 192007

Trailblazer EXT 6-cyl

  • Automatic transmission
  • miles


After fueling smelled a fuel odor when none was spilled.

- Mentor, OH, USA

problem #4

Apr 092007

Trailblazer EXT 4WD 8-cyl

  • Automatic transmission
  • 73,037 miles
I smelled a strong odor of gasoline, and had fuel leaking from the gas tank. I was afraid to keep driving it like that, I took it to get repaired. The service technician had to replace the sending unit module, part # MU1377. He said it was corroded.

- Lockport, NY, USA

problem #3

Feb 252007

Trailblazer EXT

  • Automatic transmission
  • 42,229 miles
The contact owns a 2003 Chevrolet Trailblazer ext. The contact opened the rear hatch and heard a cracking noise coming from the top. Approximately three to four days later the contact noticed that the center high mounted stop lamp bracket failed. The vehicle was brought to the dealer simmons-rockwell Chevrolet. The dealer took the vehicle to another mechanic, and informed the contact that the failure was typical for that type of vehicle and was indeed a safety issue. The mechanic stated that the entire center high mounted stop lamp could become detached while driving and strike another vehicle. The contact found another complaint online with ODI # 10061979. The contact filed a complaint with the manufacturer, and was given case # 71-500170558. Also, the contact stated the fuel system failed. In January of 2007, the contact detected an aroma of gas while driving the vehicle. The odor became increasingly potent, and the vehicle was taken to the dealer, who stated that the fuel pump module was corroded and leaked. And the dealer quoted a repair price of $800. The fuel pump filter was repaired, and after serious negotiations, the contact was only required to pay $196. The contact searched online, and found an open investigation, PE07013 from NHTSA dated March 12, 2007 for the fuel system. The failure mileage was 42,229.

- Bath, NY, USA

problem #2

Dec 102006

Trailblazer EXT 4WD 6-cyl

  • 61,000 miles
I own a 2003 Chevy Trailblazer ext. I began smelling gas, and soon after noticed it leaking from my vehicle. After taking it into my local dealership it was found that my fuel module and gas lines needed to be replaced because of corrosion. Because of the word corrosion it then voided being covered under my extended warranty. The SUV sat at the dealership for 5 weeks because of a national backorder on the fuel lines. So, with having no vehicle rental would not be covered because it was not warranty work. I was stuck with a $900 bill on a vehicle that was three and a half years old.

- Lockport, NY, USA

problem #1

Nov 292006

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 75,000 miles
I own a 2003 Chevrolet Trailblazer ext. I smelled a strong odor of gas emanating from my vehicle recently. After some investigating, I discovered that there was fuel leaking out of the top of my fuel tank only while the engine was running. I dropped the fuel tank and discovered that the metal nipples from the top of the fuel pump that connect the fuel lines to the fuel pump were completely rusted and when the vehicle was running, fuel was jetting all over the under carriage of my vehicle. The metal ring that holds the fuel pump to the tank was also severely rusted. GM should know better than to put exposed metal fittings in a recessed tank where it is subject to rust, salt, corrosion etc. I had to replace the fuel pump at a significant cost. I also believe that this could be a potential fire hazard as the fuel was jetting all over the undercarriage and its proximity to the exhaust. My fittings were so brittle that you could crush them with your bare hands. Left unchecked, undoubtedly I would have experienced a loss of power and would have been a hazard to the other vehicles on the road-yet alone probably would have been stranded when the vehicle died. The old parts are available for inspection. A fuel pump should last more that (3) years in my opinion. This is a design and/or product failure.

- Steubenville, OH, USA

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