NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
1,466 reports14,000 miles · Dec 22, 2006
Electrical SystemExterior LightingVisibility
NIGHT DRIVING UNDER NORMAL CIRCUMSTANCES THE VEHICLE A CHEVROLET TRAILBLZER LS 2005 HAS A PROBLEM THAT RANDOMLY SHUTS OFF THE HEADLIGHTS AND DASHBOARD LIGHTS. THE TRAILBLAZER DECIDES TO DO THIS TOTALLY ON ITS OWN AT RANDOM. THIS CAUSES A POTENTIALLY DEADLY SITUATION WHEN ON THE INTERSTATE AND YOUR HEADLIGHTS GO OUT AND DECIDE …
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NIGHT DRIVING UNDER NORMAL CIRCUMSTANCES THE VEHICLE A CHEVROLET TRAILBLZER LS 2005 HAS A PROBLEM THAT RANDOMLY SHUTS OFF THE HEADLIGHTS AND DASHBOARD LIGHTS. THE TRAILBLAZER DECIDES TO DO THIS TOTALLY ON ITS OWN AT RANDOM. THIS CAUSES A POTENTIALLY DEADLY SITUATION WHEN ON THE INTERSTATE AND YOUR HEADLIGHTS GO OUT AND DECIDE TO COME BACK ON AT RANDOM INTERVALS MAYBE APROXIMATELY 15 TO 20 SECONDS APART. SEVERAL ATTEMPS HAVE BEEN MADE TO THE CHEVROLET DEALERSHIP TO GET THE PROBLEM REPAIRED. THEIR COMMENT IS THAT THEY EITHER CANNOT DUPLICATE THE PROBLEM OR THEIR IS A SERVICE BULLETIN THAT EXPLAINS THE ISSUE. I HAVE DONE THE PROCEDURES THAT THE DEALERSHIP DESCRIBED IN THE SERVICE BULLETINS WITH NO SUCCESS. CURRENTLY MY TRAILBLAZER IS BEING REPAIRED ONCE AGAIN AT TERRY LEE CHEVROLET AS OF 12-19-06. THE LAST TIME THAT THE VEHICLE WAS IN FOR REPAIR TERRY LEE CHEVROLET REPLACED WHAT THEY HAD THOUGH WAS A FAULTY BODY CONTROL MODULE. REPLACING THIS MODULE OBVIOUSLY DID NOT RECTIFY THE PROBLEM AND ON THURSDAY 12-14-06 THE PROBLEM ONCE AGAIN RETURNED. SINCE THE VEHICLE IS USED TO TRANSPORT MY CHILDEREN AND WIFE WHO HAVE BEEN DRIVING PRIMARILY AT NIGHT. I HAVE BECOME SKEPTICAL ABOUT WHETHER OR NOT THE VEHICLE IS SAFE TO ACTUALLY DRIVE AT NIGHT BECAUSE YOU NEVER KNOW WHEN THE LIGHTS WILL DECIDE TO TURN OFF BY THEMSELVES AND POTENTIALLY CAUSE THEM TO BE IN AN ACCIDENT. *NM
NHTSA ODI #10176786
Mileage unknown · Dec 13, 2006
Electrical System
HEADLIGHTS..FOR NO APPARENT REASON MY HEADLIGHT FLASH OFF AND RIGHT BACK ON AND THEN FLICKER AT A CONSTANT I HAVE TAKEN MY TRAILBLAZER TO THE DEALER WHERE I BOUGHT IT SEVERAL TIMES AND THEY SAY THAT THEY CAN'T FIND THE PROBLEM..I HAVE HAD THIS VEHICLE IN THE SHOP SEVERAL DIFFERENT TIMES..THEY HAVE REPLACED THE INSTRUMENT PANEL A…
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HEADLIGHTS..FOR NO APPARENT REASON MY HEADLIGHT FLASH OFF AND RIGHT BACK ON AND THEN FLICKER AT A CONSTANT I HAVE TAKEN MY TRAILBLAZER TO THE DEALER WHERE I BOUGHT IT SEVERAL TIMES AND THEY SAY THAT THEY CAN'T FIND THE PROBLEM..I HAVE HAD THIS VEHICLE IN THE SHOP SEVERAL DIFFERENT TIMES..THEY HAVE REPLACED THE INSTRUMENT PANEL AND THE SPEEDOMETER CABLE..THE ONSTAR COMPUTER NOW YOU TELL ME WHY THEY CAN'T FIGURE OUT WHAT IS BLOWING THESE THINGS OUT..WHY THEY CAN'T FIND A PROBLEM WITH THEM. *JB
NHTSA ODI #10176063
32,000 miles · Dec 13, 2006
Air Bags
DT*: THE CONTACT STATED ALTHOUGH THERE WERE NO PREVIOUS PROBLEMS WITH THE AIRBAGS, THERE WAS A NHTSA RECALL, #06V417000 ON THE VEHICLE REGARDING THE AIRBAGS AND REPURCHASE OF THE VEHICLE. THE DEALER AND MANUFACTURER WERE ALERTED, AND CONFIRMED THE VEHICLE WAS SUBJECT FOR REPURCHASE, BUT HAVE NOT DONE SO AT THIS TIME.
NHTSA ODI #10176019
16,000 miles · Dec 7, 2006
Power Train
I BOUGHT THIS SUV TO GO OFF ROAD, MOSTLY RIDING IN THE SAND ON THE BEACH. THE FIRST TIME ON THE SAND IT DID NOT WANT TO GO AND I THOUGHT MY HUSBAND OR I DID SOMETHING WRONG. HOWEVER THE SECOND TIME IT WENT A SHORT DISTANCE AND THEN SANK UP TO THE AXLES AND WE HAD TO HAVE IT TOWED OFF THE BEACH. IT WAS TAKEN TO THE DEALERSHIP AND…
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I BOUGHT THIS SUV TO GO OFF ROAD, MOSTLY RIDING IN THE SAND ON THE BEACH. THE FIRST TIME ON THE SAND IT DID NOT WANT TO GO AND I THOUGHT MY HUSBAND OR I DID SOMETHING WRONG. HOWEVER THE SECOND TIME IT WENT A SHORT DISTANCE AND THEN SANK UP TO THE AXLES AND WE HAD TO HAVE IT TOWED OFF THE BEACH. IT WAS TAKEN TO THE DEALERSHIP AND THEY COULD FIND NOTHING WRONG WITH IT, AND ACTED LIKE THIS WAS THE FIRST COMPLAINT ON THIS PROBLEM, HOWEVER MY ACCOUNTANT HAS THE SAME SUV SAME YEAR MODEL AND SAME PROBLEM, TOOK IT TO THE SAME DEALERSHIP AND WAS ALSO TOLD THERE WAS NOTHING WRONG WITH HIS TRAILBLAZER. *JB
NHTSA ODI #10175541
27,573 miles · Dec 2, 2006
Electrical System
WHILE DRIVING TO WORK IN THE EARLY MORNING WHEN IT WAS STILL DARK THE HEADLIGHTS AND DASH BOARD LIGHTS BEGAN TO FLICKER. THEY GOT REALLY DIM AND THEN CAME BACK TO FULL BRIGHTNESS. THIS HAPPENED FOR A PERIOD OF 15 - 20 MINUTES WHICH WAS WHEN I TURNED THE VEHICLE OFF. I TOOK THE VEHICLE TO THE DEALER WHERE IT WAS PURCHASED AND …
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WHILE DRIVING TO WORK IN THE EARLY MORNING WHEN IT WAS STILL DARK THE HEADLIGHTS AND DASH BOARD LIGHTS BEGAN TO FLICKER. THEY GOT REALLY DIM AND THEN CAME BACK TO FULL BRIGHTNESS. THIS HAPPENED FOR A PERIOD OF 15 - 20 MINUTES WHICH WAS WHEN I TURNED THE VEHICLE OFF. I TOOK THE VEHICLE TO THE DEALER WHERE IT WAS PURCHASED AND THEY WERE UNABLE TO DUPLICATE THE PROBLEM. THEY TOLD ME LATER THAT AFTERNOON THAT GM HAD BEEN CONTACTED AND THAT GM STATED THAT THIS WAS A NORMAL CONDITION AND THAT NO REPAIRS WERE WARRANTED. I FOUGHT WITH THE DEALER AND TOLD THEM THAT IT WAS NOT A NORMAL CONDITION AND THAT I WAS UNABLE TO DRIVE THE VEHICLE IN THE DARK BECAUSE IT CAUSED A SAFETY ISSUE BOTH TO MYSELF AND TO OTHER VEHICLES ON THE ROAD. THEY KEPT THE VEHICLE FOR 3 DAYS AND THEN TOLD ME THAT GM WAS AWARE THAT THERE WAS IN FACT A PROBLEM WITH THE AIR PUMP HOWEVER THEY DID NOT KNOW WHAT TO DO TO FIX THE PROBLEM. I WAS ALSO TOLD THAT IT WILL CONTINUE TO DO THE SAME THING ON AND OFF IN THE FUTURE. THIS IS DEFINITELY A SAFETY ISSUE. WHEN THIS HAPPENS THE CARS DIRECTLY IN FRONT OF ME AND ON COMING TRAFFIC THINK THAT I AM FLASHING MY HIGH BEAMS AT THEM NOT TO MENTION THAT IT IS VERY DISTRACTING TO ME WHILE I AM DRIVING AND I AM SURE THAT EVENTUALLY, WHETHER IT IS MY VEHICLE OR ANOTHER VEHICLE WITH THE SAME PROBLEM, THIS WILL CAUSE AN ACCIDENT. AFTER LOOKING THROUGH THE COMPLAINTS ON THIS WEB SITE I HAVE FOUND 17 OTHER VEHICLES WITH THE SAME EXACT PROBLEM. THE OWNERS OF THOSE VEHICLES WERE ALSO GIVEN THE SAME "LAME" EXCUSE THAT I WAS GIVEN. *NM
NHTSA ODI #10175001
44,100 miles · Nov 29, 2006
Vehicle Speed Control
SPEEDOMETER WENT HAYWIRE ON A 450 MILE TRIP GOT ABOUT 200 MILES AND THE SPEEDOMETER READ 90 MPH WHEN CRUISE CONTROL WAS SET AT 79 MPH. WENT TO GET OFF OF EXIT AND WHEN I STOPPED IT DIDN'T GO BACK TO 0 INSTEAD WHEN I STARTED DRIVING AGAIN IT WENT BELOW 120 AND WAS HANGING DIRECTLY DOWN. WE GOT IT BACK DOWN TO ZERO BY HAVING TO S…
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SPEEDOMETER WENT HAYWIRE ON A 450 MILE TRIP GOT ABOUT 200 MILES AND THE SPEEDOMETER READ 90 MPH WHEN CRUISE CONTROL WAS SET AT 79 MPH. WENT TO GET OFF OF EXIT AND WHEN I STOPPED IT DIDN'T GO BACK TO 0 INSTEAD WHEN I STARTED DRIVING AGAIN IT WENT BELOW 120 AND WAS HANGING DIRECTLY DOWN. WE GOT IT BACK DOWN TO ZERO BY HAVING TO START IT AND TURN IT OFF 5 MILES AT A TIME. IT HAS HAPPENED 3 TIMES NOW IN LESS THAN A WEEK. *JB
NHTSA ODI #10174743
19,476 miles · Nov 27, 2006
Engine And Engine Cooling
DT*: THE CONTACT STATED WHILE DRIVING 60 MPH, THE VEHICLE STALLED WITHOUT WARNING. IT WAS MANEUVERED OFF THE ROAD AND RESTARTED. THIS HAD HAPPENED FOUR TIMES AND THE DEALER REPLACED THE W MODULE AND TWO SPARK PLUGS, CLEANED THE THROTTLE PLATE AND REPAIRED A GROUND WIRE. THE PROBLEM RECURRED AND THE DEALER COULD NOT DUPLICATE …
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DT*: THE CONTACT STATED WHILE DRIVING 60 MPH, THE VEHICLE STALLED WITHOUT WARNING. IT WAS MANEUVERED OFF THE ROAD AND RESTARTED. THIS HAD HAPPENED FOUR TIMES AND THE DEALER REPLACED THE W MODULE AND TWO SPARK PLUGS, CLEANED THE THROTTLE PLATE AND REPAIRED A GROUND WIRE. THE PROBLEM RECURRED AND THE DEALER COULD NOT DUPLICATE THE PROBLEM.
NHTSA ODI #10174387
30,000 miles · Nov 24, 2006
Air Bags
DT*: THE CONTACT STATED A NHTSA RECALL LETTER WAS RECEIVED # 06V417000 REGARDING THE AIR BAGS: FRONTAL. THE MANUFACTURER'S HOTLINE WAS CONTACTED WHO RECOMMENDED THAT ALL DOCUMENTS RELATING TO THE VEHICLE BE FAXED TO THE MANUFACTURER. THE CONTACT RECEIVED CONFIRMATION THAT THE PAPERWORK WAS RECEIVED AND WAS DIRECTED TO TAKE THE …
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DT*: THE CONTACT STATED A NHTSA RECALL LETTER WAS RECEIVED # 06V417000 REGARDING THE AIR BAGS: FRONTAL. THE MANUFACTURER'S HOTLINE WAS CONTACTED WHO RECOMMENDED THAT ALL DOCUMENTS RELATING TO THE VEHICLE BE FAXED TO THE MANUFACTURER. THE CONTACT RECEIVED CONFIRMATION THAT THE PAPERWORK WAS RECEIVED AND WAS DIRECTED TO TAKE THE VEHICLE TO THE DEALER FOR A VEHICLE EXCHANGE. WHEN THE VEHICLE WAS TAKEN TO THE DEALER THEY WERE UNAWARE OF HOW TO HANDLE THE RECALL OF THE ENTIRE VEHICLE. THE DEALER AND THE MANUFACTURER HAVE BEEN IN CONFERENCE REGARDING HOW TO HANDLE THIS RECALL FOR A WHILE AND THERE WAS AN EXPIRATION ON HOW THE VEHICLE CAN BE HELD.
NHTSA ODI #10174189
30,021 miles · Nov 13, 2006
Electrical System
DT*: THE CONTACT STATED WHILE DRIVING VARIOUS SPEEDS AT NIGHT, THE HEADLIGHTS, INTERIOR DOME LIGHT AND THE INSTRUMENT PANEL FLICKERED ON AND OFF WITHOUT WARNING. THE VEHICLE WAS DRIVEN TO THE DEALER WHO COULD NOT DUPLICATE THE PROBLEM. UPDATED 11/13/06. *JB
NHTSA ODI #10173389
24,000 miles · Nov 11, 2006
Electrical System
INTERMITTENT ELECTRICAL PROBLEM...WHEN DRIVING, LIGHTS DIM, ELECTRIC GAUGE GOES DOWN SEVERAL NOTCHES BELOW NORMAL READING AND THEN UP SEVERAL NOTCHES PAST NORMAL READING. THIS HAS BEEN AN ONGOING PROBLEM, GETTING WORSE, WITH THE LATEST INCIDENT HAVING OCCURRED TODAY, NOV. 11, 2006. *NM
NHTSA ODI #10173205
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.