NHTSA owner reports · September 18, 2026 snapshot.
Power Train complaints
51 reportsClear category filter90,000 miles · May 16, 2014
Electrical SystemEnginePower Train
SIR/ MA'AM, I NOTICED RECENTLY IN THE NEWS THAT SEVERAL GM PRODUCT LINES HAVE BEEN PLAGUED BY FAULTY IGNITION SWITCHES CAUSING THE VEHICLE TO LOSE POWER AND/OR CUT OUT. I IMPLORE YOU TO LOOK INTO THE TRAILBLAZERS. I EMAILED GM WHILE I WAS DEPLOYED (2012) AND THEY GAVE ME THE RUNAROUND SAYING THAT IT IS NOT A DOCUMENTED PROBLEM,…
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SIR/ MA'AM, I NOTICED RECENTLY IN THE NEWS THAT SEVERAL GM PRODUCT LINES HAVE BEEN PLAGUED BY FAULTY IGNITION SWITCHES CAUSING THE VEHICLE TO LOSE POWER AND/OR CUT OUT. I IMPLORE YOU TO LOOK INTO THE TRAILBLAZERS. I EMAILED GM WHILE I WAS DEPLOYED (2012) AND THEY GAVE ME THE RUNAROUND SAYING THAT IT IS NOT A DOCUMENTED PROBLEM, AS EXPECTED. A SIMPLE INTERNET SEARCH WOULD SHOW THAT A LOT OF OTHER TRAILBLAZER OWNERS HAVE BAD IGNITION SWITCHES/ ELECTRICAL ISSUES THAT CAUSE THE VEHICLE TO LOSE POWER AT ALL SPEEDS. MY WIFE LOST POWER GOING ABOUT 35 MPH AND I HAD MY TWO CHILDREN ALONG WITH HER. THIS IS JUST ONE EXAMPLE, ON ONE OCCASION. GRANTED, I DO ACKNOWLEDGE THIS PROBLEM IS INTERMITTENT, IT STILL OCCURS AT RANDOM AND AT ALL SPEEDS. GM TELLS ME TO GO TO A DEALER AND HAVE THEM LOOK AT IT. I REFUSE TO PAY GM ANY MONEY TO HAVE A DEALERSHIP RIP ME OFF FOR AN IGNITION SWITCH THAT IS FLAWED AND REPLACE IT WITH THE SAME FAULTY OEM STYLE/MODEL NUMBER. I HAVE RAN A SCAN TOOL LOOKING FOR CODES AND IT DOESN'T HAVE ANY. LIKE STATED PREVIOUSLY, THIS IS ANOTHER LINE OF GM THAT IS PLAGUED WITH IGNITION AND ELECTRICAL ISSUES THAT GM REFUSES TO TAKE OWNERSHIP OF. THE MILEAGE I HAVE ENTERED IS APPROXIMATE. I CANNOT REMEMBER EXACT NUMBERS, BUT IT HAS HAPPENED FOR YEARS, INTERMITTENTLY. WHEN THE VEHICLE HAS COASTED TO IT'S FINAL DESTINATION AFTER LOSING POWER, IT STARTS UP AND DRIVES NORMAL AGAIN AFTER IT IS PUT BACK INTO PARK. ALSO KEEP IN MIND THAT IT DOESN'T SHOW ANY CHECK ENGINE LIGHTS, INDICATING A PROBLEM OR NEED OF SERVICING. AGAIN, PLEASE LOOK INTO THIS PRODUCT LINE AS I KNOW THE RESULT(S) WILL SHOW THAT GM IS LIABLE AND I DON'T WANT ANY FATALITIES BECAUSE NOBODY SPOKE UP ABOUT IT. *TR
NHTSA ODI #10592057
111,920 miles · Jan 7, 2014
Power Train
WHILE WE WERE DRIVING ON I-94 NEAR MILE MARKER 12 IN MICHIGAN, THE REAR AXLE BROKE, MAKING THE CAR INOPERABLE. WE WERE ABLE TO COAST TO THE SHOULDER OF THE INTERSTATE. *TR
NHTSA ODI #10558793
91,800 miles · Jul 25, 2013
Electrical SystemFuel System, GasolinePower Train
DRIVER SIDE MASTER POWER WINDOW SWITCH DOES NOT WORK THE DRIVER SIDE WINDOW AT ALL! OUT OF THE BLUE THIS STOPPED WORKING. FURTHER RESEARCH SHOWS THAT THE 2006-2007 MODELS WERE RECALLED NOT THE 2005! REALLY, THIS CAR IS "CURRENTLY REGISTERED IN A COLD WEATHER STATE WHICH USES SALT TO CLEAR THE ROADS" (DIRECT QUOTE FROM GENERAL M…
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DRIVER SIDE MASTER POWER WINDOW SWITCH DOES NOT WORK THE DRIVER SIDE WINDOW AT ALL! OUT OF THE BLUE THIS STOPPED WORKING. FURTHER RESEARCH SHOWS THAT THE 2006-2007 MODELS WERE RECALLED NOT THE 2005! REALLY, THIS CAR IS "CURRENTLY REGISTERED IN A COLD WEATHER STATE WHICH USES SALT TO CLEAR THE ROADS" (DIRECT QUOTE FROM GENERAL MOTORS AND ISUZU RECALL 258,000 SUVS, THE ASSOCIATED PRESS, AUGUST 19, 2012) SINCE 12/2005 WHICH IS WHEN THE VEHICLE WAS PURCHASED. JUST BECAUSE MY VEHICLE DID NOT HAVE A FIRE "YET" BUT I HAVE THE "EXACT" PROBLEM WHICH AROSE BEFORE THESE VEHICLES DID CATCH FIRE, MINE IS NOT RECALLED? NOT ONLY WAS THE TRANSMISSION RECALLED IN 2008, I HAD A PROBLEM WITH THE "BLOWER MOTOR" NOT WORKING WHEN YOU TURN ON THE HEAT. YOU COULD ONLY TURN ON THE HEAT TO NO. 4. THE TRUCK WAS TAKEN FOR SERVICE ON 1/10/06, 1/30/06, 2/7/06 AND 2/17/06 WHICH WAS NOT EVEN 2 MO. AFTER PURCHASING SAID VEHICLE BEFORE THE PROBLEM WAS CORRECTED. IN 11/06 THE "FUEL PUMP MODULE" WAS REPLACED AND COVERED "ONLY" BECAUSE I HAD THE EXTENDED WARRANTY AND I HAD TO PAY THE $100.00 DEDUCTIBLE, BECAUSE I HAD GAS BUT IT WAS NOT REGISTERING. AGAIN, I CONTINUE TO HAVE THIS PROBLEM. WHEN CALLING GM ON 7/24/13 ABOUT THE WINDOW SWITCH RECALL, I NOW FIND OUT THAT THERE IS A "SPECIAL COVERAGE" FOR THE "FUEL LEVEL SENSOR". THIS IS COVERED UNTIL 7/24/14, PER GM (866-694-6546), UNLESS YOU HAVE MORE THAN 120,000 SOMETHING MILES. WAS NOT SURE OF THE MILEAGE EXACTLY SINCE MINE IS BELOW THAT FIGURE. THE WINDOW SWITCH IS A SERIOUS MALFUNCTION THAT NEEDS TO BE COVERED IN "ALL YEARS" OF THIS VEHICLE. WHILE SITTING AT A RED LIGHT WITH YOUR FOOT ON THE BRAKE, THE VEHICLE WILL JUST REV UP AND WANT TO TAKE OFF. I GUESS THIS ISN'T A "BIG DEAL" EITHER. YOU CAN'T EVEN LISTEN TO THE RADIO TO DISTRACT YOU WITH ALL THESE PROBLEMS GOING ON BECAUSE THE RADIO ONLY COMES OUT OF "ONE" SPEAKER! GO FIGURE, IT IS GM! *TR
NHTSA ODI #10531819
150,000 miles · May 23, 2013
Power TrainSteeringStructure
TL* THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 70 MPH, THE POWER STEERING ASSIST FAILED. THE CONTACT MENTIONED THAT THE FAILURE RECURRED SEVERAL TIMES. THE CONTACT ALSO STATED THAT THE LIFT GATE REVEL MOLDING WAS FRACTURED. THE VEHICLE WAS TOWED TO THE DEALER WHERE IT WAS D…
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TL* THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 70 MPH, THE POWER STEERING ASSIST FAILED. THE CONTACT MENTIONED THAT THE FAILURE RECURRED SEVERAL TIMES. THE CONTACT ALSO STATED THAT THE LIFT GATE REVEL MOLDING WAS FRACTURED. THE VEHICLE WAS TOWED TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE POWER STEERING, POWER TRANSMISSION AND THE REAR DECK MOLDING NEEDED TO BE REPLACED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 150,000 AND THE CURRENT MILEAGE WAS 166,324. THE VIN WAS NOT AVAILABLE. *TR
NHTSA ODI #10513324
146,000 miles · Feb 7, 2013
Air BagsPower TrainStructureCrashInjury
CRASHED STRAIGHT INTO THE BACK END OF A VEHICLE DOING 60 WHILE I WAS DOING ATLEAST 80, OR 85, MAYBE MORE, I DON'T REMEMBER. THE FIRST THING I REMEMBER SEEING IS REALIZING I'M ALRIGHT DESPITE THE BLOOD IN THE COCKPIT AND ON MY FACE DESPITE SNEEZING WHICH WAS SPREADING BLOOD. IS THIS A VEHICLE DEFECT OR WHAT? MY MATH SAYS T…
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CRASHED STRAIGHT INTO THE BACK END OF A VEHICLE DOING 60 WHILE I WAS DOING ATLEAST 80, OR 85, MAYBE MORE, I DON'T REMEMBER. THE FIRST THING I REMEMBER SEEING IS REALIZING I'M ALRIGHT DESPITE THE BLOOD IN THE COCKPIT AND ON MY FACE DESPITE SNEEZING WHICH WAS SPREADING BLOOD. IS THIS A VEHICLE DEFECT OR WHAT? MY MATH SAYS THAT CRASHING AT 85MPH INTO A VEHICLE DOING 60 IS LIKE CRASHING INTO A BRICK WALL AT 25MPH. I'VE HAD A LOCAL MECHANIC CHECK IT OUT AND HE SAYS ACCORDING TO HIS OBD-II COMPUTER EVERYTHING IS WORKING FINE (OR WAS ATLEAST) :) ANYWAYS, PLEASE FEEL FREE TO CONTACT ME AGAIN WITH ANY MORE QUESTION YOU MAY HAVE. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
NHTSA ODI #10496767
62,000 miles · Oct 10, 2012
Electrical SystemPower TrainVehicle Speed Control
IS NO LONGER WORKING BROKEN. *TR
NHTSA ODI #10479652
140,000 miles · Oct 1, 2012
Power Train
I AM NOT SURE WHAT IS WRONG WITH THIS CAR! I HAVE HAD IT AT THE MECHANIC SEVERAL TIMES. HE HAS REPLACED SOME SENSORS BUT THE CAR STILL...PUTTERS..PUTTERS.. AND PUTTERS......HELP!!! THE CAR JERKS, PUTTERS AND SOMETIMES DIES WHILE DRIVING! *TR
NHTSA ODI #10478100
132,000 miles · Sep 12, 2012
Electrical SystemPower Train
DOOR LOCKS REPEATEDLY LOCKED AND UNLOCKED, THEN CASCADING FAILURES, ANTI-LOCK LIGHT, ENGINE LIGHT, OTHER WARNING LIGHTS. ENGINE STARTED TO RUN ROUGH AND WOULD NOT MAKE POWER, ENGINE QUIT. NOTE TRANSMISSION GEAR INDICATOR READ INCORRECTLY. DISCONNECTED BATTERY, AND RECONNECTED, ENGINE STARTED GOT ME HOME. THREE OCCURRENCES THAT T…
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DOOR LOCKS REPEATEDLY LOCKED AND UNLOCKED, THEN CASCADING FAILURES, ANTI-LOCK LIGHT, ENGINE LIGHT, OTHER WARNING LIGHTS. ENGINE STARTED TO RUN ROUGH AND WOULD NOT MAKE POWER, ENGINE QUIT. NOTE TRANSMISSION GEAR INDICATOR READ INCORRECTLY. DISCONNECTED BATTERY, AND RECONNECTED, ENGINE STARTED GOT ME HOME. THREE OCCURRENCES THAT THE ENGINE JUST QUITS. IT WILL RESTART AFTER A FEW MINUTES. MECHANIC COULD NOT FIND ANYTHING WRONG. HAD ANOTHER OCCURRENCE, MECHANIC FOUND A CODE INDICATING THE ECM MAY BE BAD. HE TELLS ME THIS SHOULD HAVE NOTING TO DO WITH THE DOOR LOCKS. THE DOOR LOCKS LATCH AND UNLATCH, UNCOMMANDED. ENGINE STOPS WHEN UNDER POWER. MECHANIC HAS NO COURSE OF ACTION AT THIS TIME. *TR
NHTSA ODI #10475137
103,000 miles · Jan 25, 2012
Fuel System, GasolinePower TrainVehicle Speed Control
MY 2005 TRAILBLAZER HAS BEGUN TO HAVE SEVERAL PROBLEMS AND IN SPEAKING TO OTHER CHEVY OWNERS THE SAME PROBLEMS HAVE BEEN FOUND IN OTHER MODELS AND YEARS OF CHEVY TRUCKS AND SUVS. I'M VERY DISAPPOINTED TO SEE THAT CHEVY CHOOSES NOT TO RECALL, WHICH IS WHY I'LL NEVER PURCHASE ANOTHER CHEVROLET. BEGINNING A FEW MONTHS AGO MY GAUGES…
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MY 2005 TRAILBLAZER HAS BEGUN TO HAVE SEVERAL PROBLEMS AND IN SPEAKING TO OTHER CHEVY OWNERS THE SAME PROBLEMS HAVE BEEN FOUND IN OTHER MODELS AND YEARS OF CHEVY TRUCKS AND SUVS. I'M VERY DISAPPOINTED TO SEE THAT CHEVY CHOOSES NOT TO RECALL, WHICH IS WHY I'LL NEVER PURCHASE ANOTHER CHEVROLET. BEGINNING A FEW MONTHS AGO MY GAUGES BEGAN TO BE ERRATIC. STARTING WITH MY SPEEDOMETER STICKING AT ZERO AND THEN LATER STICKING AT 60MPH EVEN WHILE SITTING STILL. SOMETIMES IT WORKS AND SOMETIMES IT DOESN'T. NEXT WHILE SITTING AT TRAFFICE LIGHTS OR STOPS SIGNS MY ENGINE BEGAN TO SURGE FORWARD WITHOUT APPLYING THE GAS. WHEN THE VEHICLE SURGES THE RPM GAUGE ALSO JUMPS UP. I ALREADY REPLACED ONE TRANSMISSION AT 50K MILES AND NOW SINCE PASSING 100K MILES HAVE BEGUN TO HAVE ROUGH SHIFTING AGAIN IN MY VEHICLE. I DO NOT DRIVE MY VEHICLE IN A ROUGH MANNER, SPEED, OR HAUL A TRAILER, SO THERE IS NO REASON TO BE GOING THROUGH TRANSMISSIONS. NOW MY FUEL GAUGE HAS STOPPED WORKING AND I'M HAVING TO TRACK MY MILEAGE WITH MY ODOMETER. I'VE NEVER SEEN A VEHICLE WITH SO MANY PROBLEMS AND NO HELP OFFERED FROM THE MAKER. * TR
NHTSA ODI #10445153
97,650 miles · Nov 23, 2011
Power Train
AT APPROXIMATELY 11:00 AM JUST AFTER PARKING THE VEHICLE IN AN INCLINED HOME DRIVEWAY AND AFTER TURNING THE ENGINE OFF FOR 2-3 MINUTES AND WITH THE AUTOMATIC TRANSMISSION IN THE PARK POSITION, THE VEHICLE ON ITS OWN STARTED TO ROLL DOWN THE CONCRETE DRIVEWAY AND INTO THE RESIDENTIAL STREET. NO ONE WAS INJURED OR RUN OVER, THOUG…
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AT APPROXIMATELY 11:00 AM JUST AFTER PARKING THE VEHICLE IN AN INCLINED HOME DRIVEWAY AND AFTER TURNING THE ENGINE OFF FOR 2-3 MINUTES AND WITH THE AUTOMATIC TRANSMISSION IN THE PARK POSITION, THE VEHICLE ON ITS OWN STARTED TO ROLL DOWN THE CONCRETE DRIVEWAY AND INTO THE RESIDENTIAL STREET. NO ONE WAS INJURED OR RUN OVER, THOUGH THE POTENTIAL WAS GREAT SINCE MY WIFE AND I WERE BOTH UNLOADING THE CAR FROM THE REAR SIDE DOORS AND THE TAILGATE, BUT WE WERE NEITHER IN THE DOORWAYS OR BEHIND THE VEHICLE. APPARENTLY THE PARK TRANSMISSION LOCK FAILED OR BECAME DISENGAGED - A SERIOUS DEFECT. THE VEHICLE CAME TO A STOP IN THE MIDDLE OF THE STREET. I RESTARTED THE CAR AND HAVE DRIVEN IT OVER 100 MILES WITHOUT INCIDENT SINCE YESTERDAY. I HAVE USED THE PARK POSITION WITHOUT INCIDENT SINCE THAT TIME, THOUGH I HAVE NOT PARKED THE VEHICLE ON AN INCLINED SURFACE.
NHTSA ODI #10437188
NHTSA investigations
2RQ17002 · 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.
DP10001 · Fuel Level Gauge System Failure
Opened Jan 7, 2010 · Closed May 23, 2011
Status: closed (inferred from source dates) · Fuel System, Other; Fuel System, Other:storage:fuel Gauge System
The Office of Defects Investigation has received 668 complaints alleging inaccurate fuel gauge reading while driving in model year 2005-07 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Saab 9-7x vehicles.Of the 668 complaints, 58 incidents were alleged to result in a vehicle stall.Of the 58 stalling incidents, 43 complaints reported stalling because the fuel level reading indicated more fuel availability than what is actually in the fuel tank. One complaint alleged a vehicle crash after the vehicle stalled while exiting the interstate, became disabled, and was struck from behind.Summarily, the complaints show an apparent increasing trend, with most complaints received within the past year.A Preliminary Evaluation has been opened to assess the scope, frequency and potential safety consequences associated with the alleged defect.
Additional source detail variants (2)
Fuel System, Other
The Office of Defects Investigation has received 668 complaints alleging inaccurate fuel gauge reading while driving in model year 2005-07 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Saab 9-7x vehicles.Of the 668 complaints, 58 incidents were alleged to result in a vehicle stall.Of the 58 stalling incidents, 43 complaints reported stalling because the fuel level reading indicated more fuel availability than what is actually in the fuel tank. One complaint alleged a vehicle crash after the vehicle stalled while exiting the interstate, became disabled, and was struck from behind.Summarily, the complaints show an apparent increasing trend, with most complaints received within the past year.A Preliminary Evaluation has been opened to assess the scope, frequency and potential safety consequences associated with the alleged defect.
Fuel System, Other:storage:fuel Gauge System
The Office of Defects Investigation has received 668 complaints alleging inaccurate fuel gauge reading while driving in model year 2005-07 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Saab 9-7x vehicles.Of the 668 complaints, 58 incidents were alleged to result in a vehicle stall.Of the 58 stalling incidents, 43 complaints reported stalling because the fuel level reading indicated more fuel availability than what is actually in the fuel tank. One complaint alleged a vehicle crash after the vehicle stalled while exiting the interstate, became disabled, and was struck from behind.Summarily, the complaints show an apparent increasing trend, with most complaints received within the past year.A Preliminary Evaluation has been opened to assess the scope, frequency and potential safety consequences associated with the alleged defect.