IllustrationFILLER NECK TO GAS TANK LEAKING....DANGEROUS !! CAUSES THE CHECK ENGINE LIGHT TO STAY ON....
2004 Chevrolet Trailblazer Ext 370
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
About this comparison →How this year compares
Owner complaints by model year
Compare all Trailblazer Ext 370 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 12 of 15 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Electrical System. Review the 6 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Fuel System, Gasoline. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Fuel/propulsion System. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
1 crash reports0 fire reports1 injury reports
Fuel/propulsion System complaints
3 reportsRECEIVED A LETTER FROM GM REGARDING POTENTIAL PROBLEM WITH FUEL TANK INLET VALVE. TOOK VEHICLE TO DEALER LEN STOLER, INC IN WESTMINSTER MD IN DECEMBER. PROBLEM WAS DIAGNOSED AS A FUEL TANK INLET VALVE FRACTURE. ON DEC 3RD 2015 FUEL TANK WAS REPLACED AND INSPECTION DONE. SUBSEQUENT TO SERVICE WHEN FUEL WAS PLACED IN VEHICLE GAS P…
Read full complaint
RECEIVED A LETTER FROM GM REGARDING POTENTIAL PROBLEM WITH FUEL TANK INLET VALVE. TOOK VEHICLE TO DEALER LEN STOLER, INC IN WESTMINSTER MD IN DECEMBER. PROBLEM WAS DIAGNOSED AS A FUEL TANK INLET VALVE FRACTURE. ON DEC 3RD 2015 FUEL TANK WAS REPLACED AND INSPECTION DONE. SUBSEQUENT TO SERVICE WHEN FUEL WAS PLACED IN VEHICLE GAS POURED OUT ON PAVEMENT. PRIOR TO THAT SERVICE THIS WAS NOT AN ISSUE ONLY THE SMELL OF FUEL IN THE INTERIOR AND A FEW DROPS OF FUEL NOTED. TOOK VEHICLE BACK TO DEALER AND PROBLEM NOW DIAGNOSED AS INLET PIPE FRACTURE. WAS TOLD I WOULD HAVE TO PAY FOR THIS SERVICE, DESPITE SERVICE DEPT HAVING NOT MENTIONED THIS WHEN FUEL TANK WAS REPLACED AND VEHICLE INSPECTED AND LEFT DEALER IN UNSAFE OPERATING CONDITION. PART WAS NOT AVAILABLE AND WAS TOLD I SHOULD DRIVE IT AND HAVE WORK DONE LATER. SINCE THIS PART IS CONNECTED TO FUEL TANK SHOULD HAVE BEEN NOTICED WHEN FUEL TANK WAS REPLACED AND WORK DONE AT THAT TIME.
TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER EXT 370. WHILE IN A PARKING LOT, THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS TOWED TO AN INDEPENDENT DEALER. THE TECHNICIAN DIAGNOSED THAT THE FUEL PUMP AND FUEL FILTER NEEDED TO BE REPLACED THE FILLER INLET WAS ALSO CRACKED. THE CONTACT MENTIONED THAT THE FUEL PUMP, THE…
Read full complaint
TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER EXT 370. WHILE IN A PARKING LOT, THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS TOWED TO AN INDEPENDENT DEALER. THE TECHNICIAN DIAGNOSED THAT THE FUEL PUMP AND FUEL FILTER NEEDED TO BE REPLACED THE FILLER INLET WAS ALSO CRACKED. THE CONTACT MENTIONED THAT THE FUEL PUMP, THE FUEL FILTER, AND THE HOSE WERE REPLACED. HOWEVER, THE FUEL TANK FILLER INLET WAS NOT. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 115,869.
Official recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
1EA07009 · Fuel Pump Module Leaks Gasoline
Opened Jul 10, 2007 · Closed Aug 28, 2008
Status: closed (inferred from source dates) · Fuel System, Gasoline:delivery:fuel Pump
DURING THE COURSE OF THIS EA INVESTIGATION, ODI OBSERVED THAT THE MAJORITY OF THE COMPLAINTS (88%) AND WARRANTY CLAIMS (94%) WERE REPORTED FOR VEHICLES THAT ARE REGISTERED FOR USE IN THE SALT BELT REGION OF THE US.THIS AREA INCLUDES 20 STATES IN THE NORTHEAST, MID ATLANTIC AND THE MIDWEST REGIONS AND THE DISTRICT OF COLUMBIA.CONSUMERS IN THE SALT BELT REGION REPORTED TO ODI THAT THEY COULD SMELL FUEL VAPORS IN THEIR VEHICLES WHILE DRIVING.UPON FURTHER EXAMINATION OF THEIR VEHICLES, THEY DISCOVERED THAT FUEL VAPORS WERE COMING OUT OF THE TOP OF THE FUEL TANK. THIS CONDITION IS CAUSED BY CORROSION OF THE RETURN AND SENDER LINES OF THE FUEL PUMP MODULE.WATER AND ROAD SALT COLLECT ON TOP OF THE FUEL PUMP LEADING TO SMALL PINHOLES APPEARING ON THE FUEL LINES.FUEL MAY LEAK AND COLLECT ON TOP OF THE MODULE AND/OR SPILL ONTO THE GROUND.THE DATA EVALUATED UNDER THIS INVESTIGATION REFLECT A RELATIVELY LOW FREQUENCY OF OCCURRENCE THAT LARGELY ARISES IN SALT BELT STATES.GM HAS EXTENDED THE WARRANTY ON THE SUBJECT COMPONENT TO TEN YEARS OR 120,000 MILES.FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED AT THIS TIME; ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT NO SAFETY-RELATED DEFECT EXISTS.THE AGENCY RESERVES THE RIGHT TO TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.FOR ADDITIONAL INFORMATION SELECT DOCUMENT SEARCH.