NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
1,081 reports90,000 miles · Nov 2, 2010
Electrical System
THE SPEEDOMETER DOES NOT DISPLAY THE CORRECT SPEED. CAUSING THE DRIVER TO DRIVE AT UNKNOWN SPEEDS. THE GAUGE WILL STICK AT 25MPH OR NOT WORK AT ALL. THE DRIVER HAS TO GUESS AT WHAT SPEEDS THEY ARE DRIVING. THIS HAPPENS INTERMITTENTLY SO SOMETIMES THE SPEED IS CORRECTLY DISPLAYED AND MOST OF THE TIME IT IS INCORRECT. I CONTA…
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THE SPEEDOMETER DOES NOT DISPLAY THE CORRECT SPEED. CAUSING THE DRIVER TO DRIVE AT UNKNOWN SPEEDS. THE GAUGE WILL STICK AT 25MPH OR NOT WORK AT ALL. THE DRIVER HAS TO GUESS AT WHAT SPEEDS THEY ARE DRIVING. THIS HAPPENS INTERMITTENTLY SO SOMETIMES THE SPEED IS CORRECTLY DISPLAYED AND MOST OF THE TIME IT IS INCORRECT. I CONTACTED GM DEALERSHIP FOR REPAIR OPTIONS AND THE PRICE FOR THE PART ALONE IS $400. I CONTACTED GM THEY TOLD ME NO RECALL OR "SPECIAL POLICY" COVERED MY VEHICLE. BUT THERE IS A "SPECIAL POLICY" FOR OTHER GM TRUCKS OF THE SAME YEAR. THE POLICY COVERS THE EXACT PROBLEM WITH THE GAUGE CLUSTER OR INSTRUMENT PANEL. THE NUMBER IS BULLETIN NUMBER: 07187A. BEING UNABLE TO DRIVE AT KNOWN SPEEDS IS A VERY DANGEROUS DRIVING CONDITION. *TR
NHTSA ODI #10363723
72,000 miles · Oct 27, 2010
Electrical System
2004 CHEVY TRAILBLAZER INSTRUMENT CLUSTER FAILURE. APPROXIMATELY 1.5 TO 2 YEARS AGO I NOTICED THAT I HAD ON AND OFF PROBLEMS WITH THE RPM GAUGE AND GAS GAUGE. THE OTHER GAUGES, INCLUDING THE SPEEDOMETER, STARTED TO FAIL AND NOW NONE OF THEM WORK AT ALL. THE VEHICLE HAS NOT BEEN IN ANY ACCIDENTS AND AT THIS POINT, I HAVE NOT H…
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2004 CHEVY TRAILBLAZER INSTRUMENT CLUSTER FAILURE. APPROXIMATELY 1.5 TO 2 YEARS AGO I NOTICED THAT I HAD ON AND OFF PROBLEMS WITH THE RPM GAUGE AND GAS GAUGE. THE OTHER GAUGES, INCLUDING THE SPEEDOMETER, STARTED TO FAIL AND NOW NONE OF THEM WORK AT ALL. THE VEHICLE HAS NOT BEEN IN ANY ACCIDENTS AND AT THIS POINT, I HAVE NOT HAD ANY WORK DONE TO REPAIR THE PROBLEM DUE TO THE COST. I HAVE BEEN INFORMED THAT THIS IS A PROBLEM FOR THIS TYPE OF VEHICLE AND THAT GM HAS RECALLED OTHER VEHICLES OF THE SAME YEAR FOR THE SAME PROBLEM, BUT HAVE NOT DONE IT WITH THE TRAILBLAZER. *TR
NHTSA ODI #10362676
100,197 miles · Oct 24, 2010
Electrical System
OIL PRESSURE GAUGE BECAME UNRELIABLE AND HAD DIFFERENT READING EACH TIME THE CAR WAS DRIVEN. MOST RECENTLY THE GAUGE NEEDLE MOVES PAST THE UPPER LIMITS OF THE GAUGE AND POINTS STRAIGHT DOWN AT THE FUEL GAUGE. TWO DAYS AGO, THE SPEEDOMETER BEGAN ACTING IN THE SAME ERRATIC MANNER AND WILL GIVE VARIOUS READINGS INCLUDING EXCEEDIN…
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OIL PRESSURE GAUGE BECAME UNRELIABLE AND HAD DIFFERENT READING EACH TIME THE CAR WAS DRIVEN. MOST RECENTLY THE GAUGE NEEDLE MOVES PAST THE UPPER LIMITS OF THE GAUGE AND POINTS STRAIGHT DOWN AT THE FUEL GAUGE. TWO DAYS AGO, THE SPEEDOMETER BEGAN ACTING IN THE SAME ERRATIC MANNER AND WILL GIVE VARIOUS READINGS INCLUDING EXCEEDING 120 MPH AND WILL POINT STRAIGHT DOWN AT THE STEERING COLUMN. IT MAY READ ANYWHERE FROM 30 MPH TO 75 MPH AT VARIOUS TIME WHEN THE VEHICLE IS PARKED AND THE IGNITION IS OFF. BOTTOM LINE IS THAT I AM NO LONGER TO CHECK MY SPEED IN COMPARISON TO SPEED LIMITS OR SPEED WARNING SIGNS WHEN IN MOUNTAINOUS TERRAIN. *TR
NHTSA ODI #10362167
62,000 miles · Oct 21, 2010
Electrical System
TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT WAS DRIVING AT AN UNKNOWN SPEED WHEN HE NOTICED ALL OF THE GAUGES ON THE INSTRUMENTAL PANEL WERE DISPLAYING IMPROPER READINGS. THE FAILURE WAS CONSTANT YET THE VEHICLE WAS NOT TAKEN TO BE EXAMINED FOR THE CAUSE OF FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILUR…
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TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT WAS DRIVING AT AN UNKNOWN SPEED WHEN HE NOTICED ALL OF THE GAUGES ON THE INSTRUMENTAL PANEL WERE DISPLAYING IMPROPER READINGS. THE FAILURE WAS CONSTANT YET THE VEHICLE WAS NOT TAKEN TO BE EXAMINED FOR THE CAUSE OF FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 62,000 AND THE CURRENT MILEAGE WAS 63,000.
NHTSA ODI #10361527
90,000 miles · Oct 21, 2010
Electrical System
TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT BELIEVED HE WAS DRIVING APPROXIMATELY 45 MPH WHEN HE NOTICED HE WAS PASSING ALL OF THE OTHER VEHICLES ON THE ROADWAY. HE THEN REALIZED THAT THE SPEEDOMETER WAS DISPLAYING AN IMPROPER READING. THE FAILURE PERSISTED AND PROGRESSIVELY BECAME WORSE. THE VEHICLE WAS NOT…
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TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT BELIEVED HE WAS DRIVING APPROXIMATELY 45 MPH WHEN HE NOTICED HE WAS PASSING ALL OF THE OTHER VEHICLES ON THE ROADWAY. HE THEN REALIZED THAT THE SPEEDOMETER WAS DISPLAYING AN IMPROPER READING. THE FAILURE PERSISTED AND PROGRESSIVELY BECAME WORSE. THE VEHICLE WAS NOT TAKEN TO BE EXAMINED FOR THE CAUSE OF FAILURE AND WAS NOT REPAIRED. THE FAILURE AND CURRENT MILEAGE WAS 90,000.
NHTSA ODI #10361518
79,000 miles · Oct 13, 2010
Electrical System
TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. WHILE DRIVING 55 MPH THE CONTACT NOTICED THAT THE SPEEDOMETER WAS NO LONGER WORKING PROPERLY. HE STATED THAT HE COULD NO LONGER TELL WHAT SPEED THE VEHICLE WAS TRAVELING. THE FAILURE HAD OCCURRED FOR ALMOST A YEAR. THE VEHICLE WAS NOT TAKEN TO AN AUTHORIZED DEALER FOR THE FAILURE…
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TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. WHILE DRIVING 55 MPH THE CONTACT NOTICED THAT THE SPEEDOMETER WAS NO LONGER WORKING PROPERLY. HE STATED THAT HE COULD NO LONGER TELL WHAT SPEED THE VEHICLE WAS TRAVELING. THE FAILURE HAD OCCURRED FOR ALMOST A YEAR. THE VEHICLE WAS NOT TAKEN TO AN AUTHORIZED DEALER FOR THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 79,000 AND THE CURRENT MILEAGE WAS 86,000.
NHTSA ODI #10360239
76,628 miles · Oct 11, 2010
Seats
THE DRIVER'S POWER SEAT CONTROL PANEL HAS BROKEN OFF THREE TIMES. I REPLACED IT TWO TIMES. THIS TIME, I HAVE SIMPLY TAKEN A PLASTIC TIE AND FASTENED IT MORE OR LESS IN PLACE. IT LOOKS JUNKY, BUT AT LEAST IT IS USABLE FOR A WHILE. *TR
NHTSA ODI #10360015
Mileage unknown · Oct 1, 2010
Electrical System
WAS DRIVING AND MY SPEEDOMETER STARTED ACTING UP....GIVING WRONG READINGS AND SAYING I WAS GOING 80 MPH WHEN I WAS STOPPED ALL TOGETHER. NO IT IS PERMANENTLY STUCK ON MY 2004 TRAILBLAZER. *TR
NHTSA ODI #10358568
120,000 miles · Sep 30, 2010
Electrical SystemFuel System, Gasoline
TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. WHILE DRIVING 55 MPH, THE SPEEDOMETER INDICATED A SPEED OF 0 MPH. EACH TIME SHE OPERATED THE VEHICLE, THE CONTACT STATED THAT THE SPEEDOMETER WOULD DISPLAY AN IMPROPER READING. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP WHERE IT WAS REPAIRED. THREE DAYS LATER, THE FAILURE OCCUR…
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TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. WHILE DRIVING 55 MPH, THE SPEEDOMETER INDICATED A SPEED OF 0 MPH. EACH TIME SHE OPERATED THE VEHICLE, THE CONTACT STATED THAT THE SPEEDOMETER WOULD DISPLAY AN IMPROPER READING. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP WHERE IT WAS REPAIRED. THREE DAYS LATER, THE FAILURE OCCURRED AGAIN. IN ADDITION TO THE SPEEDOMETER, THE FUEL GAUGE ALSO GAVE INCORRECT READINGS ON THE FUEL LEVEL AND THE RPM GAUGE ALSO DISPLAYED INCORRECT READINGS. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE THE CONTACT WAS INFORMED THAT THE FUEL TANK HAD TO BE REMOVED AND THE RPM GAUGE FAILURE HAD BEEN REPAIRED THREE TIMES. THE PROBLEMS HAD NOT BEEN REMEDIED. THE FAILURE MILEAGE WAS APPROXIMATELY 120,000 AND THE CURRENT MILEAGE WAS APPROXIMATELY 142,000.
NHTSA ODI #10358402
106,042 miles · Sep 28, 2010
Fuel System, Gasoline
MY 2004 CHEVY TRAILBLAZER HAS A GAS LEAK LEAKS WHEN RUNNING AND THAT POSES A DANGER TO EVERYONE THAT HAS THIS MODEL GAS TANK THIS IS CLEARLY A DEFECT MANY PEOPLE ONLINE HAVE POSTED ABOUT IT ITS SEEMS TO BE IN A RANGE FROM 2002 2004 TRAILBLAZER ENVOY THAT'S WHAT I'VE FOUND OUT FROM MY RESEARCH. *TR
NHTSA ODI #10357971
NHTSA investigations
4RQ17002 · 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.
PE04032 · Brake Lamp Failure
Opened Apr 6, 2004 · Closed Aug 3, 2004
Status: closed (inferred from source dates) · Exterior Lighting:brake Lights
THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED THIS INVESTIGATION ON MODEL YEAR (MY) 2002-04 CHEVROLET TRAILBLAZER VEHICLES.GM REPORTS THAT OTHER VEHICLES SHARING THIS PLATFORM AND BRAKE LAMP DESIGN ARE THE MY 2002-2004 CHEVROLET TRAILBLAZER EXT; GMC ENVOY, XL, XUV; OLDSMOBILE BRAVADA AND 2004 BUICK RAINIER.COMPLAINTS ALLEGE THAT THE REAR BRAKE LAMP DOES NOT OPERATE WHEN THE BRAKE PEDAL IS DEPRESSED.THERE IS NO INDICATION TO THE DRIVER FROM INSIDE THE VEHICLE THAT ONE OR MORE BRAKE LAMPS BULBS ARE NOT FUNCTIONING.GM FOUND THAT HEAT FROM THE BULB COULD DEFORM THE LAMP SOCKET, PRODUCE ELECTRICAL ARCING AND AN INOPERATIVE BULB.TO CORRECT THE CONDITION, GM CHANGED THE BULB TO A BULB THAT TRANSMITS LESS HEAT TO THE SOCKET AND CHANGED THE SOCKET TO A THERMOPLASTIC POLYMER TO IMPROVE THERMAL STABILITY.THESE CHANGES WERE IMPLEMENTED INTO PRODUCTION VEHICLES ON OCTOBER 1, 2003.GM IMPLEMENTED A SPECIAL POLICY BY NOTIFYING CONSUMERS THAT IF THEY SHOULD EXPERIENCE A BRAKE LAMP FAILURE TO GO TO THEIR GM DEALERSHIP TO HAVE THE CIRCUIT BOARD CONTAINING THE BRAKE LAMP REPLACED ALONG WITH NEW BULBS.THIS POLICY IS GOOD FOR THE FIRST 6 YEARS OR 72,000 MILES OF THE LIFE OF THE VEHICLE.ODI WILL UPGRADE THIS INVESTIGATION TO EA 04-021 AND INCLUDE THE ABOVE MENTIONED VEHICLES.
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