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2004 Chevrolet Trailblazer Ext

Owner reports · Recalls · Investigations

Limited comparison data

There is not enough comparable history to draw a useful model-year comparison.

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When problems were reported

Mileage at the reported incident

216 reports with mileage · 45 unknown

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 145 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Fuel System, Gasoline. Review the 29 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 17 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

6 crash reports3 fire reports6 injury reports

Exterior Lighting complaints

13 reports
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59,000 miles · Apr 17, 2008
Exterior Lighting

I WAS DRIVING MY TRAILBLAZER TO MINNEAPOLIS AND THE TURN SIGNALS WERE WORKING FINE, I STOP AND WHEN I STARTED DRIVING AGAIN I WENT TO USE MY LEFT TURN SIGNAL AND THE FLASHERS WENT ON INSTEAD. IT CONTINUED TO DO THIS EVERYTIME I USED IT. I HAD TO GO AND GET THE FLASHER MODULES REPLACE AT THE COST OF 200.00. I SEE THAT THERE IS A …

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I WAS DRIVING MY TRAILBLAZER TO MINNEAPOLIS AND THE TURN SIGNALS WERE WORKING FINE, I STOP AND WHEN I STARTED DRIVING AGAIN I WENT TO USE MY LEFT TURN SIGNAL AND THE FLASHERS WENT ON INSTEAD. IT CONTINUED TO DO THIS EVERYTIME I USED IT. I HAD TO GO AND GET THE FLASHER MODULES REPLACE AT THE COST OF 200.00. I SEE THAT THERE IS A RECALL ON THIS BUT MY VIN # IS NOT INCLUDED IN THE RECALL. *TR

NHTSA ODI #10224790

43,000 miles · Mar 11, 2008
Exterior Lighting

2004 CHEVROLET TRAILBLAZER EX. BOTH BRAKE LIGHTS WERE NOT WORKING. THE CENTER HIGH BRAKE LIGHT WAS WORKING. I TOOK IT TO THE DEALER AND WAS TOLD THE REPAIR WOULD BE COVERED UNDER MY PRIVATE EXTENDED WARRANTY THAT I PURCHASED WITH THE VEHICLE. I STATED I THOUGHT IT MIGHT BE COVERED UNDER A RECALL OR SPECIAL POLICY EXTENDED…

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2004 CHEVROLET TRAILBLAZER EX. BOTH BRAKE LIGHTS WERE NOT WORKING. THE CENTER HIGH BRAKE LIGHT WAS WORKING. I TOOK IT TO THE DEALER AND WAS TOLD THE REPAIR WOULD BE COVERED UNDER MY PRIVATE EXTENDED WARRANTY THAT I PURCHASED WITH THE VEHICLE. I STATED I THOUGHT IT MIGHT BE COVERED UNDER A RECALL OR SPECIAL POLICY EXTENDED WARRANTY. THE SERVICE PERSON SAID THAT HE WOULD CHECK. 1) THERE WAS RECALL NHTSA ACTIONS # EA04021 THAT DOES NOT INCLUDE THIS YEAR VEHICLE. 2) I WAS TOLD THERE WAS A GM SPECIAL POLICY THAT WOULD COVER THE RIGHT TAILLIGHT CIRCUIT BOARD. I WAS TOLD THIS FAILURE CAUSED THE BULBS IN THE LEFT BRAKE LIGHT TO FAIL. THERE IS NOT POLICY TO REPLACE THE LEFT CIRCUIT BOARD. IF IT FAILS THERE IT WILL BE COVERED FOR 6 YEARS OR 75,000 MILES. MY ISSUE IS IT THERE IS SOME SORT OF DEFECT THAT IS CAUSING BOTH BRAKE LIGHTS TO FAIL BUT THERE IS NOT A RECALL FOR THIS YEAR MODEL. *TR

NHTSA ODI #10220770

Mileage unknown · Oct 26, 2005
Exterior Lighting

CONSUMER TOOK HER 2004 CHEVROLET TRAILBLAZER TO DEALERSHIP TO HAVE RECALL WORK DONE AND WAS TOLD THAT IT NEEDS TO BE TAKEN TO WHERE IT WAS PURCHASED. *TS RECALL#05V198000. *JB

NHTSA ODI #10141066

Official recalls

1

04V527000 · Exterior Lighting:brake Lights

Nov 1, 2004

ON CERTAIN SPORT UTILITY VEHICLES, VIBRATION AND HEAT MAY CAUSE THE TAIL LAMP/STOP LAMP BULB TO LOOSEN IN ITS SOCKET. IF THIS OCCURS, THE BULB MAY FLICKER AND EVENTUALLY BECOME INOPERATIVE.

Consequence & remedy

Consequence: AN INOPERATIVE BRAKE LAMP WILL NOT CONVEY THE DRIVER'S INTENTION OF STOPPING TO DRIVERS IN FOLLOWING VEHICLES, AND AN INOPERATIVE REAR TURN SIGNAL LAMP WILL NOT CONVEY THE DRIVER'S INTENTION TO TURN TO DRIVERS IN FOLLOWING VEHICLES. BOTH OF THESE FAILURES CAN INCREASE THE RISK OF A CRASH.

Remedy: DEALERS WILL INSPECT THE TAIL LAMP/STOP LAMP ASSEMBLIES, AND IF NECESSARY, REPLACE THEM. THE RECALL BEGAN ON NOVEMBER 22, 2004. OWNERS SHOULD CONTACT CHEVROLET AT 1-800-630-2438, OLDSMOBILE AT 1-800-630-6537, BUICK AT 1-866-608-8080, OR GMC AT 1-866-996-9463.

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

3

RQ17002 · Loss Of Headlights

Opened Apr 24, 2017 · Closed Mar 29, 2021

Status: closed (inferred from source dates) · Exterior Lighting:headlights

The subject vehicles are model year (MY) 2002-2009 Chevrolet Trailblazer, GMC Envoy, 2004-2007 Buick Rainier, 2003-2008 Isuzu Ascender, 2005-2009 Saab 9-7X, 2002-2004 Oldsmobile Bravada, 2003-2006 Chevrolet SSR, 2005-2009 Buick Lacrosse, and 2006-2008 Pontiac Grand Prix. This scope includes the Trailblazer/Envoy variants: 2002-2006 Envoy XL/Trailblazer EXT and 2004-2005 Envoy XUV. The original scope of this investigation was expanded to include all vehicles equipped with the subject Headlight Driver Module (HDM). The focus of the investigation was to determine whether actions performed by General Motors adequately addressed any unreasonable risk to motor vehicle safety in the subject vehicles concerning the headlights and the HDM that controls them.Under normal electrical load and environmental conditions, the HDM can overheat inside the Underhood Electrical Center (UEC). This can cause the module to fail and result in a simultaneous loss of both low beam headlights and both daytime running lights (DRLs), often with no warning or prior detectability to the driver. This failure can be intermittent or permanent. No other exterior lights are affected. High beams, turn signals, brake lights, and reverse lights are still operational.General Motors addressed this issue with 2 recalls (14V755 & 15V519) and a special coverage program (N172091910). In view of the recalls and special coverage program implemented by GM and the vehicle high beams continuing to operate, ODI has tentatively concluded that the actions taken by GM mitigate any unreasonable risk to safety posed by HDM failure in the subject vehicles.Accordingly, the investigation is closed. The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist. The agency reserves the right to take additional action if warranted by new circumstances.The ODI reports cited above are available for review online at NHTSA.gov under the identification numbers in the attached document.

EA07009 · 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.

EA04021 · Brake Lamp Failure

Opened Aug 3, 2004 · Closed Nov 4, 2004

Status: closed (inferred from source dates) · Exterior Lighting:brake Lights

GM STATES THAT SOME BRAKE/TAIL LAMP BULBS CAN PREMATURELY BECOME INOPERATIVE DUE TO MALFUNCTIONING BRAKE/TAIL LAMP SOCKETS.ON MARCH 2, 2004, GM INITIATED A 6-YEAR/72,000 MILE SPECIAL POLICY FOR 989,487 SUBJECT VEHICLES TO INSPECT AND REPLACE THE REAR BRAKE/TAIL LAMP BULB SOCKET ASSEMBLIES.ON APRIL 4, 2004, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION (PE04-032) BASED ON CONSUMER COMPLAINTS ALLEGING BRAKE LIGHTS NOT OPERATING WHEN THE BRAKE PEDAL IS DEPRESSED.ON AUGUST 3, 2004 ODI UPGRADED PE04-032 TO AN ENGINEERING ANALYSIS (EA04-021).BY LETTER DATED OCTOBER 27, 2004 GM NOTIFIED NHTSA THAT IT WILL CONDUCT A SAFETY RECALL (NHTSA # 04V527) COVERING SUBJECT VEHICLES THAT WERE NOT ALREADY REPAIRED UNDER GM'S SPECIAL POLICY.MY 2004 SUBJECT VEHICLES BUILT AFTER AUGUST 8, 2003 CONTAIN IMPROVED BRAKE LAMP ASSEMBLIES AND ARE NOT INCLUDED IN THE RECALL.GM DEALERS WILL INSTALL THE IMPROVED BRAKE LAMP ASSEMBLY ON SUBJECT VEHICLES BUILT ON AUGUST 8, 2003 AND EARLIER.THE ACTION TAKEN BY GM IS SUFFICIENT TO RESOLVE THE ISSUES RAISED BY THIS INVESTIGATION.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.