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: 9 of 11 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 5 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Air Bags. Review the 2 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Fuel System, Gasoline. Review the 2 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 reports1 fire reports1 injury reports
What owners actually said
11 reports
102,000 miles · Apr 9, 2007
Fuel System, Gasoline
I OWN A 2003 TRAILBLAZER SWB MODEL. I STARTED TO SMELL GAS. SEEING THE VEHICLE WAS OUT OF WARRANTY, I WAITED UNTIL IT GOT WARM TO CHECK IT OUT. WHEN I TOOK OUT THE GAS TANK THERE WAS A PIN HOLE IN THE RETURN ON THE BASE OF THE SENDING UNIT. SO I CLEANED IT OFF WITH A WIRE BRUSH AND FOUND MORE PIN HOLES. I BELONG TO A TRAILBLAZ…
Read full complaint
I OWN A 2003 TRAILBLAZER SWB MODEL. I STARTED TO SMELL GAS. SEEING THE VEHICLE WAS OUT OF WARRANTY, I WAITED UNTIL IT GOT WARM TO CHECK IT OUT. WHEN I TOOK OUT THE GAS TANK THERE WAS A PIN HOLE IN THE RETURN ON THE BASE OF THE SENDING UNIT. SO I CLEANED IT OFF WITH A WIRE BRUSH AND FOUND MORE PIN HOLES. I BELONG TO A TRAILBLAZER FORUM, AND THIS SEEMED TO BE A MORE PREVALENT PROBLEM THEN IT SHOULD BE.*AK
NHTSA ODI #10187310
Official recalls
0
No 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 ↗
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.
ODI HAS RECEIVED REPORTS THAT THE FUEL PUMP MODULE LEAKS FUEL AND OR VAPOR UNDERNEATH THE VEHICLE.GM STATES, THE FAILURE MECHANISM IS CORROSION OF THE FUEL PUMP MODULE FLANGE WHICH MAY LEAD TO A FUEL LEAK.CORROSION OF THE FUEL PUMP MODULE FLANGE IS THE RESULT OF THE VEHICLE OPERATING IN A CORROSIVE ENVIRONMENT.ODI HAS UPGRADED THIS PE TO ENGINEERING ANALYSIS (EA07-009) TO FURTHER ASSESS THIS ISSUE.
2003 Chevrolet Trailblazer 360 Problems, Complaints & Recalls | Skip That Year
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