NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
1,081 reports60,000 miles · Nov 27, 2007
Electrical System
THE SPEEDOMETER ON MY 2004 CHEVY TRAILBLAZER IS UNDEPENDABLE ESPECIALLY IN COOLER WEATHER. IT MIGHT SAY I'M GOING 120 MPH IN TOWN OR 35 MPH ON THE INTERSTATE. THIS HAPPENED LAST SPRING AND OCCASIONALLY THIS SUMMER. NOW IT IS REAL FREQUENT. WHEN I SEARCH (GOOGLE) THE PROBLEM IT APPEARS TO BE QUITE OFTEN WITH A LOT OF PEOPLE. …
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THE SPEEDOMETER ON MY 2004 CHEVY TRAILBLAZER IS UNDEPENDABLE ESPECIALLY IN COOLER WEATHER. IT MIGHT SAY I'M GOING 120 MPH IN TOWN OR 35 MPH ON THE INTERSTATE. THIS HAPPENED LAST SPRING AND OCCASIONALLY THIS SUMMER. NOW IT IS REAL FREQUENT. WHEN I SEARCH (GOOGLE) THE PROBLEM IT APPEARS TO BE QUITE OFTEN WITH A LOT OF PEOPLE. *TR
NHTSA ODI #10210038
82,000 miles · Nov 26, 2007
Electrical System
THE SPEEDOMETER IS GOING BAD. IT REGISTERS SPEEDS IN EXCESS OF 120MPH WHEN THE VEHICLE IS ONLY GOING 60MPH. THERE IS A LIMITED RECALL BUT ONLY IF YOUR VEHICLE FALLS UNDER 7 YEARS 70,000 MILES. MY 2004 TAHOE HAS 84,000 MILES AND IS NOT COVERED UNDER THIS "EXTENDED WARRANTY". *TR
NHTSA ODI #10209912
29,000 miles · Nov 22, 2007
Tires
UPON ATTEMPTING TO HAVE MY TIRE SERVICED AT A LOCAL FIRESTONE SERVICE CENTER I WAS INFORMED BY MANAGER THERE THAT ALL FOUR OF THE TIRES ON MY VEHICLE WERE DEFECTIVE, TREAD COULD SEPARATE FROM TIRE, AND THAT THEY WOULD THEREFORE NOT PERFORM ANY SERVICE. ALL TIRES SHOW CRACKING AT BASE OF TREAD WHERE IT MEATS THE SIDEWALL ALL THE …
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UPON ATTEMPTING TO HAVE MY TIRE SERVICED AT A LOCAL FIRESTONE SERVICE CENTER I WAS INFORMED BY MANAGER THERE THAT ALL FOUR OF THE TIRES ON MY VEHICLE WERE DEFECTIVE, TREAD COULD SEPARATE FROM TIRE, AND THAT THEY WOULD THEREFORE NOT PERFORM ANY SERVICE. ALL TIRES SHOW CRACKING AT BASE OF TREAD WHERE IT MEATS THE SIDEWALL ALL THE WAY AROUND EACH TIRE. THESE TIRES ARE ORIGINAL TIRES PURCHASED ON NEW GM '04 TRAILBLAZER IN FEBRUARY OF THAT YEAR. THERE IS VERY LITTLE TREADWARE AND TIRES ONLY HAVE 29,000 MILES ON THEM. TIRE DESCRIPTION: BFGOODRICH OPEN TRAIL T/A P245/70R16. DOT AP9L 2E11 3303 *TR
NHTSA ODI #10209704
51,000 miles · Nov 16, 2007
Fuel System, Other
STRONG GAS FUME ODOR COMING THROUGH VENTILATION SYSTEM. MECHANIC IDENTIFIED A LEAK IN THE FUEL PRESSURE REGULATOR. 2004 CHEVY TRAILBLAZER W/51,000 MILES. GM CERTIFIED PURCHASED IN 2005. *TR
NHTSA ODI #10209161
52,860 miles · Nov 16, 2007
Electrical System
SPEEDODOMETER STOP WORKING. *TR
NHTSA ODI #10209121
48,750 miles · Nov 15, 2007
Electrical System
SPEEDOMETER HAS FAILED, I UNDERSTAND THIS IS A OFTEN FAILING ITEM ON THE TRAILBLAZER. *TR
NHTSA ODI #10209013
Mileage unknown · Nov 6, 2007
Service Brakes, Hydraulic
ABS ACTIVATION AT LOW SPEED AND THEN ABS HOLDING UP. I ALMOST GOT INTO 3 ACCIDENTS WITH SMALL CHILDREN IN CAR. I HAVE REPLACED BRAKE PADS, ROTORS, ABS SENSORS, CALIPERS, BRAKE LINES AND BRAKE SWITCH. NOTHING WORKS. FRONT TIRE AREA CATCHES ON FIRE IF DRIVEN FOR LONG DISTANCES. HARD TIME STOPPING. GM WILL NOT RECALL OR REPAIR. TH…
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ABS ACTIVATION AT LOW SPEED AND THEN ABS HOLDING UP. I ALMOST GOT INTO 3 ACCIDENTS WITH SMALL CHILDREN IN CAR. I HAVE REPLACED BRAKE PADS, ROTORS, ABS SENSORS, CALIPERS, BRAKE LINES AND BRAKE SWITCH. NOTHING WORKS. FRONT TIRE AREA CATCHES ON FIRE IF DRIVEN FOR LONG DISTANCES. HARD TIME STOPPING. GM WILL NOT RECALL OR REPAIR. THERE IS A TSB (020525006) ON SAME PROBLEM BUT NOT FOR MY STATE. RECALL IN OTHER PARTS OF COUNTRY FOR SAME PROBLEM, BUT GM STATES NOT FOR MY STATE EVEN THOUGH IT IS FOR SAME PROBLEM. VERY DANGEROUS TO DRIVE. *TR
NHTSA ODI #10208044
40,000 miles · Oct 31, 2007
Electrical System
THE SPEEDOMETER IN MY 2004 CHEVY TRAILBLAZER WILL GET STUCK AT VARIOUS POSITIONS (CURRENTLY AT OVER 120 MPH). THE ONLY WAY TO CORRECT THIS IS TO DISCONNECT THE NEGATIVE TERMINAL ON THE BATTERY OR STOP/RESTART THE CAR NUMEROUS TIMES. I HAVE NO IDEA HOW FAST I AM REALLY GOING WHEN THIS PROBABLY OCCURS BECAUSE THE BASELINE FOR TH…
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THE SPEEDOMETER IN MY 2004 CHEVY TRAILBLAZER WILL GET STUCK AT VARIOUS POSITIONS (CURRENTLY AT OVER 120 MPH). THE ONLY WAY TO CORRECT THIS IS TO DISCONNECT THE NEGATIVE TERMINAL ON THE BATTERY OR STOP/RESTART THE CAR NUMEROUS TIMES. I HAVE NO IDEA HOW FAST I AM REALLY GOING WHEN THIS PROBABLY OCCURS BECAUSE THE BASELINE FOR THE SPEED IS NO LONGER AT ZERO. THIS IS A DANGEROUS ISSUE. SOME RESEARCH ON THE INTERNET HAS SHOWN THAT THIS IS A COMMON PROBLEM WITH 03 TO 06 GM CARS AND TRUCKS, AND PARTICUARLY THE 04 TO 05 MODELS, AND IT SEEMS TO OCCUR AFTER THE WARRANTY IS OUT FOR MOST PEOPLE. GM KNOWS THEY HAVE A PROBLEM AND CHARGES $500+ FOR THE FIX, BUT INDEPENDENT SHOPS CHARGE LESS THAN $200. NOT HAVING AN ACCURATE SPEEDOMETER IN A CAR THAT IS ONLY 3 YEARS OLD AND HAS ONLY 50,000 MILES BECAUSE OF LOW QUALITY COMPONENTS USED IS NOT ACCEPTABLE AND GIVEN THE NUMBER OF ISSUES OUT THERE AND THE COST TO FIX I FEEL THE THE NHTSA SHOULD FORCE GM TO RECALL OR OFFER THE FIX WHEN THE PROBLEM OCCURS TO OWNERS OF 03 TO 06 GM PRODUCTS FOR FREE. *TR
NHTSA ODI #10207503
60,000 miles · Oct 24, 2007
Electrical System
ON OUR 2004 TRAILBLAZER, AT 60,000 MILES, THE SPEEDOMETER STARTED TO MALFUNCTION, SHOWING YOU GOING FASTER THAN YOU ARE. IT DOES NOT ALWAYS RESET TO ZERO. I HAVE READ NUMEROUS REPORTS ABOUT SPEEDOMETER PROBLEMS FOR 2003-2007 GM TRUCKS AND SUVS. THERE SHOULD DEFINITELY BE A RECALL ON THIS AS THIS IS A SERIOUS SAFETY PROBLEM. …
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ON OUR 2004 TRAILBLAZER, AT 60,000 MILES, THE SPEEDOMETER STARTED TO MALFUNCTION, SHOWING YOU GOING FASTER THAN YOU ARE. IT DOES NOT ALWAYS RESET TO ZERO. I HAVE READ NUMEROUS REPORTS ABOUT SPEEDOMETER PROBLEMS FOR 2003-2007 GM TRUCKS AND SUVS. THERE SHOULD DEFINITELY BE A RECALL ON THIS AS THIS IS A SERIOUS SAFETY PROBLEM. I ALSO HAVE SEEN THAT IN CA THERE ARE LAWSUITS AND A CLASS ACTION SUIT PENDING. OUR LOCAL TV STATION WANTS TO DO SEGMENT ON THIS PROBLEM. *TR
NHTSA ODI #10206733
Mileage unknown · Oct 19, 2007
Electrical System
HEADLIGHTS DIM AND FLASH AT RANDOM TIMES WHILE DRIVING UNDER REGULAR CONDITIONS. BATTERY GAUGE ON DASHBOARD SHOWS VARYING VOLTAGES. GM/CHEVY DEALERSHIPS SUGGEST REPLACING ALTERNATOR, BUT THAT DOES NOT FIX THE PROBLEM.
NHTSA ODI #10206324
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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