NHTSA owner reports · September 18, 2026 snapshot.
Power Train complaints
62 reportsClear category filter105,000 miles · Sep 26, 2014
Power TrainSuspension
THREE TIMES SINCE PURCHASING THIS VEHICLE IN JANUARY 2012, I HAVE HAD TO REPLACE THE RIGHT FRONT WHEEL HUB ASSEMBLY DUE TO BEARING FAILURE. RECENTLY THE TRANSMISSION, WHICH HAS NOT EXHIBITED A LEAK, WAS VERY LOW ON FLUID, (3 QUARTS) AND THE FLUID WAS BURNED. THE TRANSMISSION NOW SLIPS AND IS CHANGING ERRATICALLY. THE VEHICLE WA…
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THREE TIMES SINCE PURCHASING THIS VEHICLE IN JANUARY 2012, I HAVE HAD TO REPLACE THE RIGHT FRONT WHEEL HUB ASSEMBLY DUE TO BEARING FAILURE. RECENTLY THE TRANSMISSION, WHICH HAS NOT EXHIBITED A LEAK, WAS VERY LOW ON FLUID, (3 QUARTS) AND THE FLUID WAS BURNED. THE TRANSMISSION NOW SLIPS AND IS CHANGING ERRATICALLY. THE VEHICLE WAS REGULARLY SERVICED AT BUFF WHELAN CHEVROLET IN STERLING HEIGHTS, MI. *TR
NHTSA ODI #10639419
120,000 miles · Jun 19, 2014
Power TrainSteering
SHUT CAR OFF AND WHEN I ATTEMPTED TO RESTART KEY WOULD NOT TURN. STEERING WHEEL WAS NOT LOCKED AND IT WOULD NOT SHIFT INTO GEAR. AN HOUR LATER RETURNED TO HAVE IT TOWED AND TRIED THE KEY AND VEHICLE STARTED. *TR
NHTSA ODI #10604501
120,000 miles · May 18, 2014
Electrical SystemPower Train
THIS WAS ACTUALLY THE SECOND OR THIRD INCIDENT WHERE THE KEY GOT STUCK IN THE IGNITION, BLAZER WAS IN PARK THE LIGHTS REMAINED ON SO DID THE RADIO ANYTHING THAT IS TYPICALLY ON DURING AUX, BUT THIS WAS THE BEGINNING OF A LONG PROBLEM THAT LEAD TO ME TRADING OFF..THE KEY GETS STUCK YOU CAN NOT REMOVE IT CAUSED THE BATTERY TO GO B…
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THIS WAS ACTUALLY THE SECOND OR THIRD INCIDENT WHERE THE KEY GOT STUCK IN THE IGNITION, BLAZER WAS IN PARK THE LIGHTS REMAINED ON SO DID THE RADIO ANYTHING THAT IS TYPICALLY ON DURING AUX, BUT THIS WAS THE BEGINNING OF A LONG PROBLEM THAT LEAD TO ME TRADING OFF..THE KEY GETS STUCK YOU CAN NOT REMOVE IT CAUSED THE BATTERY TO GO BAD, IT WOULD BEGIN TO HAPPEN OFTEN THE SERVICE ENGINE SOON LIGHT WOULD COME ON, THE TRANSMISSION WOULD NOT SHIFT ABOVE 3RD GEAR, ALSO SHORTLY AFTER THE PURCHASE IN SEPT OF 2011 THE SPEEDOMETER STOPPED WORKING. THE BLAZER DIED 3 TIMES GAUGES ON DASH WOULD PERIODICLY STOP WORKING. MY SERVICE 4 WHEEL WOULD COME ON RANDOMLY THE KEY ISSUE WAS THE BIGGEST PROBLEM BUT IT WAS ONLY A MATTER OF TIME BEFORE OTHER THINGS WENT WRONG. WHEN THE KEY WOULD GET STUCK IN THE IGINTION AS STATED THE TRANSMISSION WOULD NOT SHIFT PROPERLY IN THE BEGINNING THE TRANSMISSION WOULD ACT OUT ONCE YOU TOOK IT OUT OF PARK IT WAS NOTICEABLE BUT AS THE PROBLEM BECAME WORSE IT STARTED HAPPENING DRIVING DOWN THE HIGHWAY I NOTICED ONCE THAT I HAVE SUCCESSFULLY MADE IT THROUGH 1-2-3 BUT NEVER GOT OUT OF 3. I SHOULD STATE THAT WHEN THE KEY WAS STUCK I WOULD HAVE TO MANUALLY SHIFT THROUGH THE FIRST AND SECOND THEN PUT IT INTO DRIVE OTHERWISE THE CAR HAD NO POWER BECAUSE IT WOULD BE STUCK IN THE HIGHER GEAR.TRIED TO CONTACT THE DEALERSHIP AS THERE WAS A RECALL ON THE DASH FOR THE 2003 MODEL AND THEY TOLD US IT WASNT A SAFETY PROBLEM I DO NOT UNDERSTAND HOW RANDOM LOSS OF POWER AND RANDOM CAR DYING IS NOT A SAFETY ISSUE, I HAVE BEEN WATCHING THE LIST OF GM RECALLS AND I HAVE NOT SEEN MUCH ABOUT THE TRAILBLAZERS, AND IT BOTHERS ME THAT I AM SURE THERE ARE OTHER ISSUES LIKE THE ONES THAT I HAD. ON ANOTHER NOTE TRANSMISSION RELATED MY NEIGHBORS JUST HAD TO GET RID OF THEIR TRAILBLAZER 2006 FOR TRANSMISSION PROBLEMS. *JS
NHTSA ODI #10592221
94,430 miles · Apr 27, 2014
Power Train
MY CHEVY TRAILBLAZER 2004 SLOWED DOWN TO 20MPH ON THE HIGHWAY I HAD A VERY HARD AN SCARY TIME PULLING OVER I GOT MY THROTTLE FIXED THAT COST ME 500.00 DOLLARS MY CAR IS STILL DOING THE SAME THING IT WAS DOING ON THE HIGHWAY 20MPH AND AMP IDLES VERY HIGH WONT DROP DOWN TO 0 STAYS AT 20 OR ABOVE THERE SHOULD BE A RECALL NO ONE C…
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MY CHEVY TRAILBLAZER 2004 SLOWED DOWN TO 20MPH ON THE HIGHWAY I HAD A VERY HARD AN SCARY TIME PULLING OVER I GOT MY THROTTLE FIXED THAT COST ME 500.00 DOLLARS MY CAR IS STILL DOING THE SAME THING IT WAS DOING ON THE HIGHWAY 20MPH AND AMP IDLES VERY HIGH WONT DROP DOWN TO 0 STAYS AT 20 OR ABOVE THERE SHOULD BE A RECALL NO ONE CAN FIND A PROBLEM WITH MY CAR ALL THEY WANT IS TO KEEP GUESSING WHAT THE PROBLEM IS.I REALLY WOULD LIKE TO NO BECAUSE IT KEEPS GOING BACK TO THE SAME PROBLEM DOESN'T WANT TO GO IN GEAR AND DRIVE IT JUST LET YOU PUT YOUR FOOT ON THE GAS AN DOES NOTHING. *TR
NHTSA ODI #10585153
112,000 miles · Nov 3, 2013
Power TrainStructure
MY RIGHT SIDE BACK DOOR DOES NOT OPEN AND MY LEFT BACK DOOR DOES NOT CLOSE UNLESS I HIT THE LOCK FIRST. ALSO AS I AM DRIVING NO MATTER WHAT THE WEATHER MY 4 WHEEL DRIVE WILL JUST KICK IN ON ITS OWN. NOW IT FEEL AS THOUGH THE TRANSMISSION IS GOING. THIS TO ME IS A DANGER TO MY CHILDREN AND MYSELF> I ALSO FEEL THAT THESE ARE DEFEC…
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MY RIGHT SIDE BACK DOOR DOES NOT OPEN AND MY LEFT BACK DOOR DOES NOT CLOSE UNLESS I HIT THE LOCK FIRST. ALSO AS I AM DRIVING NO MATTER WHAT THE WEATHER MY 4 WHEEL DRIVE WILL JUST KICK IN ON ITS OWN. NOW IT FEEL AS THOUGH THE TRANSMISSION IS GOING. THIS TO ME IS A DANGER TO MY CHILDREN AND MYSELF> I ALSO FEEL THAT THESE ARE DEFECTS IN THIS VEHICLE AS I FEEL G.M SHOULD BE RESPONSIBLE I WILL NEVER BUY ANOTHER G.M AGAIN. SOMEONE SHOULD LOOK INTO THIS. *TR
NHTSA ODI #10550673
99,645 miles · Sep 13, 2012
Power Train
TRANSMISSION COOLER LINE CORRODED AND BEGAN LEAKING NEXT TO EXHAUST MANIFOLD WHICH COULD HAVE RESULTED IN A FIRE. LINES HAD TO BE REPLACED DUE TO EXCESSIVE CORROSION.
NHTSA ODI #10476241
108,000 miles · Jun 18, 2012
Power Train
LEFT MY HOUSE AT 10:00 AM TO GET MY BLAZER SERVICED, THE SHOP WAS NOT OPEN - I DID MY ROUNDS AND WAS ABOUT FIVE MINUTES FROM MY HOUSE AT A RED LIGHT, PULLED AWAY FROM THE LIGHT AT THE INTERSECTION HEARD A LOUD POP AND BLAZE STALLED. GOOD THING THERE WAS A POLICE OFFICER COMING IN THE OTHER DIRECTION, TOWED TO SHOP AT 12:00 PM W…
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LEFT MY HOUSE AT 10:00 AM TO GET MY BLAZER SERVICED, THE SHOP WAS NOT OPEN - I DID MY ROUNDS AND WAS ABOUT FIVE MINUTES FROM MY HOUSE AT A RED LIGHT, PULLED AWAY FROM THE LIGHT AT THE INTERSECTION HEARD A LOUD POP AND BLAZE STALLED. GOOD THING THERE WAS A POLICE OFFICER COMING IN THE OTHER DIRECTION, TOWED TO SHOP AT 12:00 PM WAS TOLD THAT THE FRONT TRANSMISSION WAS BURNT/BLOWN. I WENT FROM NEEDING A TUNE UP TO A MUCH MORE SERIOUS PROBLEM. JUST HAD BLAZE SERVICED 3 MONTHS PRIOR. *TR
NHTSA ODI #10462049
111,233 miles · Jan 8, 2012
Power Train
TRANS LEAK FROM TRANS COOLER LINES. *TR
NHTSA ODI #10442850
31,101 miles · Dec 28, 2010
Power Train
I HAVE A 2004 TRAILBLAZER I BOUGHT NEW IT ONLY HAS 31100 MILES ON IT AND IS IN GREAT CONDITION AND THE TRANSMISSION HAS GONE OUT ON IT ..THEIR ARE. MANY MANY COMPLAINTS ABOUT SAME THING... SOME WITH LESS MILES AND SOME WITH MORE...I CAN NOT AFFORD TO PAY 3000 DOLLARS FOR A FAULTY TRANSMISSION WHEN IT IS OBVIOUS IT IS SOMETHING T…
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I HAVE A 2004 TRAILBLAZER I BOUGHT NEW IT ONLY HAS 31100 MILES ON IT AND IS IN GREAT CONDITION AND THE TRANSMISSION HAS GONE OUT ON IT ..THEIR ARE. MANY MANY COMPLAINTS ABOUT SAME THING... SOME WITH LESS MILES AND SOME WITH MORE...I CAN NOT AFFORD TO PAY 3000 DOLLARS FOR A FAULTY TRANSMISSION WHEN IT IS OBVIOUS IT IS SOMETHING TO DO WITH GM TRANSMISSIONS....AN INVESTIGATION NEEDS TO BE DONE I AM A HUSBAND A FATHER AND BOTH ME AND MY WIFE WORK FULL TIME BUT WE CAN NOT AFFORD THIS AS MANY OTHER PEOPLE CANT AND CHEVY WILL NOT STICK UP FOR THEIR VEHICLES,,,RECALLS MUST BE DONE SO THE WORKING CLASS CAN SURVIVE WITHOUT THIS VEHICLE I WILL LOSE MY JOB AND GM WILL GET RICHER AND RICHER TO BAD THEY DON'T MAKE CARS LIKE THEY USE TOO...ALL I DID WAS GET IN MY CAR START IT LET IT WARM UP AND WENT TO PUT IT IN REVERSE AND CLUNK AND JUST GRINDING THEIR MUST BE SOMETHING DONE I AM DOING RESEARCH IT LOOKS LIKE THIS TRANSMISSION HAS BEEN FAULTY SINCE THE 2002 TRAILBLAZER CAME OUT BUT NOTHING HAS BEEN DONE ABOUT IT YET.... *TR
NHTSA ODI #10373151
111,000 miles · Feb 24, 2010
Power Train
LAST SUMMER, MY VEHICLE STARTED STUMBLING AT SPEEDS GREATER THAN 50MPH ON THE HIGHWAY. I HAD MY VEHICLE SERVICED SEVERAL TIMES, WITHOUT THE ISSUE BEING RESOLVED. I HAVE HAD THE THROTTLE BODY REPLACED, TUNE-UP, MAP SENSOR, AIR INTAKE SENSOR, FUEL SYSTEM CLEANED, FAN CLUTCH REPLACED, STILL HAD THE STUMBLING PROBLEM. APPROXIMATELY …
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LAST SUMMER, MY VEHICLE STARTED STUMBLING AT SPEEDS GREATER THAN 50MPH ON THE HIGHWAY. I HAD MY VEHICLE SERVICED SEVERAL TIMES, WITHOUT THE ISSUE BEING RESOLVED. I HAVE HAD THE THROTTLE BODY REPLACED, TUNE-UP, MAP SENSOR, AIR INTAKE SENSOR, FUEL SYSTEM CLEANED, FAN CLUTCH REPLACED, STILL HAD THE STUMBLING PROBLEM. APPROXIMATELY 2 WEEKS AGO I WAS DRIVING HOME ON THE HIGHWAY, WHEN I HEARD THE ENGINE REV UP VERY HIGH, BUT I WASN'T GOING ANY FASTER. I THEN PRESSED ON THE GAS, THE ENGINE RACED, BUT I WAS JUST COASTING. I WAS ABLE TO COAST OFF THE HIGHWAY TO THE MEDIAN, THANK GOD NOBODY WAS BEHIND ME. I ALSO THANK GOD I DIDN'T HAVE MY FAMILY WITH ME. THE MECHANIC SAID, THAT ONE OF THE GEARS INSIDE, THE TRANNY WAS BROKEN, AND THE PUMP HAD SHATTERED. I WOULD HATE TO SEE THIS HAPPEN TO SOMEONE, AND THEY CAN NOT GET OUT OF THE WAY, SOMEONE COULD GET KILLED. *TR
NHTSA ODI #10313853
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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