NHTSA owner reports · September 18, 2026 snapshot.
Electrical System complaints
617 reportsClear category filter25 miles · Oct 17, 2008
Electrical System
WHEN DRIVING AT NIGHT, MY HEADLIGHT DIM/BRIGHTEN ON THEIR OWN. HAVE BEEN TOLD THERE IS NOTHING THAT GM WILL DO FOR ME, THIS WAS REPORTED TO THE DEAL THE DAY I BOUGHT THE CAR AND I HAVE SEVERAL WORK ORDERS FOR THE DEALERSHIP TRYING TO FIND THE PROBLEM, BUT COULD NOT FIND ANYTHING AND THERE IS NO RECALL FOR IT. SO NOW, WHEN I DRIV…
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WHEN DRIVING AT NIGHT, MY HEADLIGHT DIM/BRIGHTEN ON THEIR OWN. HAVE BEEN TOLD THERE IS NOTHING THAT GM WILL DO FOR ME, THIS WAS REPORTED TO THE DEAL THE DAY I BOUGHT THE CAR AND I HAVE SEVERAL WORK ORDERS FOR THE DEALERSHIP TRYING TO FIND THE PROBLEM, BUT COULD NOT FIND ANYTHING AND THERE IS NO RECALL FOR IT. SO NOW, WHEN I DRIVE AT NIGHT, PEOPLE THINK I AM FLASHING MY LIGHTS AT THEM. I HAVE EVEN GONE TO ANOTHER DEALER AND THEY SAY THEY HEAR ALOT OF PEOPLE COMPLAINING ABOUT THIS AND THERE IS SOMETHING WRONG WITH SOME TYPE OF PROGRAMMING, BUT GM DOES NOT HAVE A FIX. THIS IS BECOMING DANGEROUS. *TR
NHTSA ODI #10245807
53,000 miles · Oct 13, 2008
Electrical SystemPower Train
HAD TO HAVE TRANSMISSION REPLACED (A WHOLE OTHER SICK STORY:( ). WHEN I GOT MY TRUCK BACK, SECOND DAY ON THE FREEWAY, THE SPEEDOMETER STARTED TO CLIMB EVEN THOUGH I WAS STAYING WITH THE FLOW OF TRAFFIC. I TWENT AROUND TO THE 100S. WHEN I GOT HOME IT SPUN STRAIGHT DOWN NOT STOPPING AT THE ZERO LIKE IT NORMALLY DID. TOOK IT BACK…
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HAD TO HAVE TRANSMISSION REPLACED (A WHOLE OTHER SICK STORY:( ). WHEN I GOT MY TRUCK BACK, SECOND DAY ON THE FREEWAY, THE SPEEDOMETER STARTED TO CLIMB EVEN THOUGH I WAS STAYING WITH THE FLOW OF TRAFFIC. I TWENT AROUND TO THE 100S. WHEN I GOT HOME IT SPUN STRAIGHT DOWN NOT STOPPING AT THE ZERO LIKE IT NORMALLY DID. TOOK IT BACK TO MECHANIC AT LEAST TWICE MAYBE 3 TIMES, HE DID SOMETHING THAT FIXED IT FOR A FEW DAYS, BUT THEN IT WOULD MESS UP AGAIN. AS IT IS RIGHT NOW, IT IS PARKED BUT SAYING IT'S AT 100+ MPH. READING OTHER PEOPLES SAME PROBLEM, IT WILL COST TOO MUCH FOR ME TO PAY THE DEALER TO FIX. I HAVE EVEN GOTTEN A SPEEDING TICKET BECAUSE OF THIS (MY FIRST IN 20 YEARS!)!!! *TR
NHTSA ODI #10245261
79,000 miles · Oct 13, 2008
Electrical System
I OWN A 2005 TRAILBLAZER AND HAVE HAD SEVERAL PROBLEMS WITH IT. CURRENTLY THE ISSUE I AM DEALING WITH IS THE SPEEDOMETER. SEVERAL WEEKS AGO, MY SPEEDOMETER WHILE DRIVING AT APPROX 30 MPH WENT ALL THE WAY AROUND PAST 120 MPH AND STUCK. FOLLOWING THAT, EVERY TIME I STARTED MY CAR, IT WOULD DECREASE 10 MPH UNTIL IT WENT BACK TO …
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I OWN A 2005 TRAILBLAZER AND HAVE HAD SEVERAL PROBLEMS WITH IT. CURRENTLY THE ISSUE I AM DEALING WITH IS THE SPEEDOMETER. SEVERAL WEEKS AGO, MY SPEEDOMETER WHILE DRIVING AT APPROX 30 MPH WENT ALL THE WAY AROUND PAST 120 MPH AND STUCK. FOLLOWING THAT, EVERY TIME I STARTED MY CAR, IT WOULD DECREASE 10 MPH UNTIL IT WENT BACK TO 0 MPH. IT WORKED FINE FOR A WHILE AND NOW I AM HAVING A PROBLEM AGAIN WITH THE NEEDLE SPUN ALL THE WAY AROUND AND DOES NOT MOVE WHEN I AM DRIVING. I UNDERSTAND THIS IS A COMMON PROBLEM WITH THIS YEAR MODEL AND FEEL THAT IS DEFINITELY A SAFETY HAZARD WHEN YOU REALLY HAVE NO IDEA HOW FAST YOU ARE GOING, IT IS A GUESSING GAME. *TR
NHTSA ODI #10245225
Mileage unknown · Oct 9, 2008
Electrical System
SPEEDOMETER, TACHOMETER, OIL PRESSURE GAUGE ALL GIVING INACCURATE READINGS! I DON'T KNOW ANY CAR, NO MATTER WHAT YEAR OR MAKE WHICH HAS THESE PROBLEMS! ONLY GM! IT IS VERY DANGEROUS TO NOT KNOW HOW FAST OR SLOW YOU'RE GOING. IMPEDING FLOW OF TRAFFIC. *TR
NHTSA ODI #10244923
43,000 miles · Oct 8, 2008
Electrical SystemExterior Lighting
I OWN A 2005 CHEVY TRAILBAZER. THE DASH AND HEADLIGHTS FLICKER AND DIM WHILE NIGHT DRIVING NO ONE CAN FIND THE PROBLEM. *TR
NHTSA ODI #10244905
78,000 miles · Sep 27, 2008
Electrical SystemFuel System, Other
SPEEDOMETER MALFUNCTIONING (NEED INSTRUMENT PANEL CLUSTER) FUEL LEVEL SYSTEM MALFUNCTIONING. *TR
NHTSA ODI #10243609
55,158 miles · Sep 23, 2008
Electrical System
TL*THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. WHILE DRIVING AT AN UNKNOWN SPEED, THE CONTACT NOTICED THAT THE SPEEDOMETER WAS STUCK. THE FAILURE OCCURS INTERMITTENTLY. HE CURRENTLY HAS AN APPOINTMENT WITH THE DEALER. THE FAILURE MILEAGE WAS 55,158.
NHTSA ODI #10243173
33,450 miles · Sep 2, 2008
Electrical SystemExterior Lighting
SPEEDOMETER ON MY TRAILBLAZER SHOWED A WILDLY INACCURATE SPEED READING. THIS READING WAS VERY LOW AND COULD HAVE RESULTED IN A SPEEDING/ SAFETY SITUATION. THE SPEEDOMETER COULD GIVE A FALSE READING ALLOWING THE DRIVER TO ENTER A CURVE OR CITY AT AN UNSAFE SPEED. AT A STOPLIGHT THE NEEDLE POINTED STRAIGHT DOWN INSTEAD OF ZERO. I…
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SPEEDOMETER ON MY TRAILBLAZER SHOWED A WILDLY INACCURATE SPEED READING. THIS READING WAS VERY LOW AND COULD HAVE RESULTED IN A SPEEDING/ SAFETY SITUATION. THE SPEEDOMETER COULD GIVE A FALSE READING ALLOWING THE DRIVER TO ENTER A CURVE OR CITY AT AN UNSAFE SPEED. AT A STOPLIGHT THE NEEDLE POINTED STRAIGHT DOWN INSTEAD OF ZERO. I CONTACTED GM WHO INFORMED ME THAT THERE ARE NOT ENOUGH COMPLAINTS ON THIS SPECIFIC MODEL TO WARRANT A RECALL. AS I UNDERSTAND IT THE COMPONENTS CAUSING THE FAILURE IN THE MODELS BEING RECALLED ARE THE SAME AS THOSE IN TRAILBLAZERS. MY VEHICLE ALSO HAS THE DIMMING/FLICKERING LIGHTS AT NIGHT. GM HAS A TECHNICAL BULLETIN OUT THAT SAYS THIS IS NORMAL. THERE HAS TO BE A REASON FOR THESE ISSUES. I DON'T CALL LOSING LIGHTS AT NIGHT NORMAL. NOR DO I HAVE CONFIDENCE THAT THE LIGHTS WILL NOT FAIL COMPLETELY. *TR
NHTSA ODI #10240630
10,000 miles · Sep 1, 2008
Electrical System
I OWN A 2005 CHEVROLET TRAILBLAZER. I HAVE HAD TROUBLE WITH THE REAR TAILLIGHTS. IN PARTICULAR THE BRAKE LIGHTS. IT HAS BEEN TO THE DEALER SEVERAL TIMES WITH NO HELP. THEY HAVE REPLACED THE SOCKET ASM. BUT NO REAL FIX AS IT COME AND GOES. I HAVE HEARD THE SAME FROM OTHER TRAILBLAZER OWNERS ALSO. 10155053 REFERS TO THIS PROBLEM A…
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I OWN A 2005 CHEVROLET TRAILBLAZER. I HAVE HAD TROUBLE WITH THE REAR TAILLIGHTS. IN PARTICULAR THE BRAKE LIGHTS. IT HAS BEEN TO THE DEALER SEVERAL TIMES WITH NO HELP. THEY HAVE REPLACED THE SOCKET ASM. BUT NO REAL FIX AS IT COME AND GOES. I HAVE HEARD THE SAME FROM OTHER TRAILBLAZER OWNERS ALSO. 10155053 REFERS TO THIS PROBLEM ALSO. THANK YOU *TR
NHTSA ODI #10240539
57,800 miles · Aug 15, 2008
Electrical System
ABOUT 2 WEEKS AGO, MY 05 TRAILBLAZER BEGAN HAVING "NO START" PROBLEMS. SOMETIMES IT WOULD START AND SOMETIMES NOT. DURING TIMES IT WOULD NOT START, I COULD NOT SHIFT IT OUT OF PARK. IF I TURN THE KEY OFF AND BACK ON AGAIN IT WOULD START. BUT I TOOK IT TO THE DEALERSHIP TO FIND OUT WHAT WAS GOING ON, AND OF COURSE, THEY COULD …
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ABOUT 2 WEEKS AGO, MY 05 TRAILBLAZER BEGAN HAVING "NO START" PROBLEMS. SOMETIMES IT WOULD START AND SOMETIMES NOT. DURING TIMES IT WOULD NOT START, I COULD NOT SHIFT IT OUT OF PARK. IF I TURN THE KEY OFF AND BACK ON AGAIN IT WOULD START. BUT I TOOK IT TO THE DEALERSHIP TO FIND OUT WHAT WAS GOING ON, AND OF COURSE, THEY COULD NOT DUPLICATE THE PROBLEM. SO I CONTINUED DRIVING IT WITH THIS OFF AND ON PROBLEM FOR 2 WEEKS UNTIL ONE DAY I WAS DRIVING ON THE INTERSTATE WITH MY SON, MOTHER AND FATHER IN THE VEHICLE. ALL OF A SUDDEN THE MOTOR JUST KILLED! LUCKILY THERE WAS NO ONE BEHIND ME AND I WAS ABLE TO PULL OVER TO THE SIDE OF THE ROAD. AS I WAS PULLING OVER THOUGH IT WAS DIFFICULT BECAUSE THE POWER BRAKES AND POWER STEERING WERE LOST. MY SON WAS VERY UPSET AND NERVOUS. THIS TIME AT THE DEALERSHIP THEY CONFIRMED IT WAS THE IGNITION SWITCH. THIS IS THE SECOND TIME REPLACING IT SINCE BUYING THE VEHICLE NEW. EVEN THE TECHNICIAN ADMITTED THAT TRAILBLAZERS HAVE ALOT OF TROUBLE WITH IGNITION SWITCHES BUT SAID THERE IS NO RECALL BECAUSE IT'S NOT A "SAFETY ISSUE". SO MY ENGINE DYING WHILE I'M TRAVELING 70MPH ON THE INTERSTATE WITH FAMILY IN THE VEHICLE POSES NO SAFETY ISSUE? I FEEL THAT CHEVROLET SHOULD ISSUE A RECALL AND REIMBURSE ME FOR MY COSTS AS MY WARRANTY IS EXPIRED. BY THE WAY, OTHER PROBLEMS I'VE HAD WITH THIS VEHICLE INCLUDE THE IDLER PULLEY, BRAKE LIGHTS GOING BAD AND MELTING INTO THE TERMINAL, SPEEDOMETER MALFUNCTION, CD PLAYER BROKEN, GLUE AROUND LICENSE PLATE FRAME OOZING AND MELTING, BROKEN LATCH ON STORAGE COMPARTMENT IN BETWEEN FRONT SEATS, FAULTY THERMOSTAT CAUSING ENGINE LIGHT TO COME ON, AND PROBLEMS WITH THE BACK HATCH DOOR. NEXT VEHICLE I BUY WILL BE A RELIABLE TOYOTA OR NISSAN. CAN'T WAIT TO GET RID OF THIS CHEVY. *TR
NHTSA ODI #10238454
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.