NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
39 reportsClear category filter78,000 miles · Jan 28, 2015
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT AN ABNORMAL NOISE WAS COMING FROM THE REAR OF THE VEHICLE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE EXHAUST MANIFOLD WAS FRACTURED AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MAD…
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TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT AN ABNORMAL NOISE WAS COMING FROM THE REAR OF THE VEHICLE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE EXHAUST MANIFOLD WAS FRACTURED AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 78,000. THE VIN WAS NOT AVAILABLE...UPDATED 05/14/15 *BF
NHTSA ODI #10679493
Mileage unknown · Jul 17, 2014
Electrical SystemEngine And Engine Cooling
I BOUGHT MY VEHICLE AT A DEALERSHIP IN 2010. I DO NOT REMEMBER THE EXACT DATE BUT IT STARTED HAVING PROBLEMS SHORTLY AFTER. THE FIRST THING THAT HAPPENED WAS ALL MY GAUGES STOPPED WORKING EXCEPT MY SPEEDOMETER. IN 2012 I WAS DRIVING AND AT TWO DIFFERENT OCCASIONS WITHIN A DAY APART, WHILE I WAS TURNING INTO A PARKING LOT OR GAS …
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I BOUGHT MY VEHICLE AT A DEALERSHIP IN 2010. I DO NOT REMEMBER THE EXACT DATE BUT IT STARTED HAVING PROBLEMS SHORTLY AFTER. THE FIRST THING THAT HAPPENED WAS ALL MY GAUGES STOPPED WORKING EXCEPT MY SPEEDOMETER. IN 2012 I WAS DRIVING AND AT TWO DIFFERENT OCCASIONS WITHIN A DAY APART, WHILE I WAS TURNING INTO A PARKING LOT OR GAS STATION, MY VEHICLE WOULD SHUT OFF. I TOOK IT TO AUTO ZONE TO HAVE ONE OF THOSE FREE TESTS DONE AND NOTHING WAS SHOWING UP AS ABNORMAL. AROUND 2013 MY VEHICLE STARTED MAKING A REAL HIGH PITCH SQUEALING SOUND DURING START UP AND WHILE DRIVING. I TOOK MY CAR INTO SINCE IT NEEDED A NEW WATER PUMP AND THEY SAID THAT THE HIGH PITCH SOUND COULD BE FIXED BUT WASN'T A SAFETY CONCERN. IN 2014 JUST A FEW MONTHS AGO, AGAIN I WAS PULLING INTO A GAS STATION AND MY VEHICLE TURNED OFF. I WAS ABLE TO TURN IT BACK ON AND HAVE ENOUGH TIME TO PULL INTO A SPOT BEFORE IT SHUT OFF AGAIN. THIS TIME IT WOULDN'T START MY KEYS WERE STUCK IN THE IGNITION AND IT COULD NOT BE JUMP STARTED. AFTER TAPING THE BATTERY THE KEYS CAME OUT OF THE IGNITION. IT STARTS NOW BUT NONE OF THE ELECTRICAL INSIDE THE VEHICLE WORKS. AT THIS POINT IT'S NOT DRIVABLE BECAUSE OF THE TEMPERATURE OUTSIDE AND THE FACT THAT I CAN'T ROLL DOWN MY WINDOWS AND THE AIR BLOWS ONLY HOT. THE STEREO DOESN'T WORK, THE SEATS TO MOVE FORWARD AND BACK DO NOT WORK. THE BACK BRAKE LIGHTS WORK BUT THE TAIL LIGHTS WHILE DRIVING DO NOT WORK. THE FRONT HEADLIGHTS WORK. *TR
NHTSA ODI #10611262
88,000 miles · Jul 27, 2012
Engine And Engine CoolingFire
OTHER DRIVERS NOTIFIED OWNER/DRIVER THAT VEHICLE WAS ON FIRE.
NHTSA ODI #10468682
125,000 miles · Feb 17, 2011
Electrical SystemEngine And Engine CoolingExterior Lighting
INSTRUMENT CLUSTER FAILURE ON 2004 CHEVROLET TRAILBLAZER. OIL PRESSURE AND AMPS GAUGE MALFUNCTION. MECHANIC QUOTED PRICE $650 TO REPLACE CLUSTER. EMISSIONS FAILURE PAID DEALER APPROXIMATELY $375 TO REPLACE EMISSIONS PUMP. AIR CONDITIONING MODE MOTOR ACTUATOR OUT; BLOWER DOESN'T OPERATE ON HIGH SETTING. DEALER QUOTED PRICE $750 T…
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INSTRUMENT CLUSTER FAILURE ON 2004 CHEVROLET TRAILBLAZER. OIL PRESSURE AND AMPS GAUGE MALFUNCTION. MECHANIC QUOTED PRICE $650 TO REPLACE CLUSTER. EMISSIONS FAILURE PAID DEALER APPROXIMATELY $375 TO REPLACE EMISSIONS PUMP. AIR CONDITIONING MODE MOTOR ACTUATOR OUT; BLOWER DOESN'T OPERATE ON HIGH SETTING. DEALER QUOTED PRICE $750 TO FIX AIR CONDITIONER. SPORADIC ELECTRICAL ISSUES-SERVICE ENGINE SOON LIGHT ON-FIRST TIME CODE READ FAULTY THERMOSTAT COOLING SENSOR, NEXT IT READ FAULTY AIR MASS SENSOR, ANOTHER TIME IT READ FAULTY EMISSIONS SENSOR. MECHANIC QUOTED PRICE $40 PER HOUR PLUS PARTS TO ISOLATE PROBLEM. A PERSON COULD GO BROKE BEFORE FIXING POSSIBLE PROBLEMS, CONSIDERING NO ACCIDENT OCCURRED DUE TO ALL THESE POSSIBILITIES. FRONT SUSPENSION PROBLEMS, HARD TO ISOLATE. PAID MECHANIC $135 TO REPLACE RIGHT SIDE INNER TIE ROD END. DID NOT FIX PROBLEM. PROBLEM OCCURS WHEN RETURNING STEERING WHEEL FROM A RIGHT TURN, FRONT RIGHT SIDE MAKES A SINGLE "POP" SOUND. HAD TO REPLACE "BURNT" HEADLIGHT PIGTAILS ON FRONT, AND PARK LIGHT PIGTAIL ON RIGHT REAR. PROPERTY DAMAGE IS CONSIDERED DAMAGE TO VEHICLE DUE TO THE COMPLAINTS LISTED. *TR
NHTSA ODI #10383037
74,393 miles · Nov 19, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILERBLAZER. THE CONTACT STATED THAT THE SERVICE ENGINE LIGHT ILLUMINATED WHILE DRIVING. THE VEHICLE WAS TAKEN TO A MECHANIC WHO STATED THAT THE FAILURE CODE INDICATED THAT THE THERMOSTAT WAS DEFECTIVE. WITHIN A FEW DAYS ALL OF THE LIGHTS ON THE INSTRUMENTAL PANEL ILLUMINATED. THE VEHICLE W…
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TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILERBLAZER. THE CONTACT STATED THAT THE SERVICE ENGINE LIGHT ILLUMINATED WHILE DRIVING. THE VEHICLE WAS TAKEN TO A MECHANIC WHO STATED THAT THE FAILURE CODE INDICATED THAT THE THERMOSTAT WAS DEFECTIVE. WITHIN A FEW DAYS ALL OF THE LIGHTS ON THE INSTRUMENTAL PANEL ILLUMINATED. THE VEHICLE WAS TAKEN BACK TO THE MECHANIC AND THERE WAS NO DIAGNOSTIC CODE DISPLAYED. THE FAILURE OCCURRED INTERMITTENTLY. THE VEHICLE WASN'T REPAIRED. THE FAILURE AND THE CURRENT MILEAGES WERE 74,393.
NHTSA ODI #10366891
101,021 miles · Jun 10, 2010
Engine And Engine Cooling
CRACKED EXHAUST MANIFOLD . NOTHING CAUSED THIS EVENT , IT JUST FAILED OUT OF NOWHERE, NOW IT HAS TO BE REPLACED , THIS IS AN UNCOMMON EVENT FOR THIS PARTICULAR PART TO JUST CRACK OR FAIL , AND AFTER READING RESEARCHING THIS EVENT I FOUND IT TO BE MORE COMMONPLACE IN THIS FROM THIS PARTICULAR CAR MANUFACTURER. THE FUMES FROM THE …
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CRACKED EXHAUST MANIFOLD . NOTHING CAUSED THIS EVENT , IT JUST FAILED OUT OF NOWHERE, NOW IT HAS TO BE REPLACED , THIS IS AN UNCOMMON EVENT FOR THIS PARTICULAR PART TO JUST CRACK OR FAIL , AND AFTER READING RESEARCHING THIS EVENT I FOUND IT TO BE MORE COMMONPLACE IN THIS FROM THIS PARTICULAR CAR MANUFACTURER. THE FUMES FROM THE EXHAUST MANIFOLD IS THE SAFETY ISSUE , NOT TO MENTION THE UNBEARABLE NOISE. *TR
NHTSA ODI #10335631
51,000 miles · Apr 20, 2010
Electrical SystemEngine And Engine Cooling
INSTRUMENT CLUSTER WENT DEAD - HEATER THERMOSTAT WENT OUT AND DRIVERS SIDE IS STUCK ON HEAT AND WON'T SHUT OFF - SENDING THE TRAILBLAZER TO OBAMA AND GOV.'T MOTORS - NO CHANCE IT WILL EVER GET FIXED SINCE OBAMA BOUGHT OFF THE UNION! *TR
NHTSA ODI #10326729
Mileage unknown · Mar 1, 2010
Engine And Engine Cooling
SERVICE ENGINE SOON LIGHT WAS ON AFTER COMPLETING A DIAGNOSTIC TEST AT A LOCAL DEALER THEY SAID THE MALFUNCTION WAS THE SECONDARY AIR INJECTION(AIR PUMP) CODE P0410. THEY SAID THE REASON THESE GO OUT IS BECAUSE OF AN ENGINEERING DEFECT AND THE WAY THEY ROUTED THE HOSES INSTEAD OF AIR FLOWING THROUGH IT CAUSES WATER TO ACCUMULATE…
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SERVICE ENGINE SOON LIGHT WAS ON AFTER COMPLETING A DIAGNOSTIC TEST AT A LOCAL DEALER THEY SAID THE MALFUNCTION WAS THE SECONDARY AIR INJECTION(AIR PUMP) CODE P0410. THEY SAID THE REASON THESE GO OUT IS BECAUSE OF AN ENGINEERING DEFECT AND THE WAY THEY ROUTED THE HOSES INSTEAD OF AIR FLOWING THROUGH IT CAUSES WATER TO ACCUMULATE THEREFORE MAKING THE MOTOR IN THE AIR PUMP TO GO BAD. SO WHILE CHANGING OUT THIS BAD AIR PUMP THERE WAS SO MUCH WATER THAT HAD ACCUMULATED IT ACTUALLY CAUSED THE LIGHT TO BLOW WHICH COULD HAVE CAUSED THE MECHANIC TO BE ELECTROCUTED! *TR
NHTSA ODI #10315304
Mileage unknown · Feb 18, 2010
Engine And Engine CoolingFire
2004 CHEVROLET TRAILBLAZER ENGINE COMPARTMENT CAUGHT FIRE WHILE DRIVING ON THE OHIO TURNPIKE. *KB OHIO TRAFFIC CRASH REPORT# 10-0001-91 UPDATED 04/15/10 *BF
NHTSA ODI #10312109
Mileage unknown · Feb 16, 2010
Engine And Engine Cooling
2004 TRAILBLAZER ,SES LIGHT ON ..CODE..SECONDARY AIR PUMP FAILURE. I REPAIRED $600.00 + NEEDED TO DO SO TO PASS EMISSIONS AND GET NEW PLATES. 2 YRS LATER ,SAME CODE,SAME ACTION REQUIRED TO RE-NEW PLATES. *TR
NHTSA ODI #10310856
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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