NHTSA owner reports · September 18, 2026 snapshot.
Exterior Lighting complaints
140 reportsClear category filter57,000 miles · Oct 27, 2008
Electrical SystemExterior LightingInterior Lighting
I HAVE AN 2005 CHEVY TRAILBLAZER THAT THE LIGHTS CONSTANTLY ARE FLASHING. THEY DIM AND THEN COME VERY BRIGHT AGAIN NON-STOP. THIS CAN NOT BE SAFE BECAUSE FOR SEVERAL INSTANCES THEY ARE SO DIM THAT YOU CAN'T SEE IN THE DARK. I HAVE HAD THE VEHICLE IN SEVERAL TIMES WHEN IT WAS UNDER WARRANTY AND GM SAID IT WAS NORMAL WHEN THE F…
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I HAVE AN 2005 CHEVY TRAILBLAZER THAT THE LIGHTS CONSTANTLY ARE FLASHING. THEY DIM AND THEN COME VERY BRIGHT AGAIN NON-STOP. THIS CAN NOT BE SAFE BECAUSE FOR SEVERAL INSTANCES THEY ARE SO DIM THAT YOU CAN'T SEE IN THE DARK. I HAVE HAD THE VEHICLE IN SEVERAL TIMES WHEN IT WAS UNDER WARRANTY AND GM SAID IT WAS NORMAL WHEN THE FAN KICKS ON. WELL IT IS NOT NORMAL OR IS IT SAFE. I CAN NOT MANUALLY FLICK THE LIGHTS AS FAST AS THEY FLICKER WHEN I AM DRIVING DOWN THE ROAD. IT IS VERY UNSAFE AND GM NEEDS TO FIND A FIX FOR IT. *TR
NHTSA ODI #10246806
64,685 miles · Oct 21, 2008
Electrical SystemExterior Lighting
HEADLIGHTS AND DASHLIGHTS FLICKER ERRATICALLY THAT IT ALMOST LOOKS LIKE YOU ARE FLASHING YOUR LIGHTS AT ONCOMING MOTORISTS. HAVE HAD IT TO THE DEALER MORE THAT SIX TIMES FOR THIS WITHOUT RESOLVE. THE DEALER SAYS IT IS NORMAL, AND THEY DON'T CARE IF WE GET KILLED. *TR
NHTSA ODI #10246287
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
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
25,025 miles · Sep 2, 2008
EquipmentExterior Lighting
TURNED VEHICLE ON AND FOUND A/C BLOWER NOT WORKING AND ABS AND BRAKE LIGHT COME ON. BLOWER WILL COME ON INTERMITTENTLY WHEN THE BAS / BRAKE LIGHT GOES OUT. I AM CONCERNED THAT IF THERE IS A SHORT IN THE SYSTEM THERE COULD BE A FIRE. CHEVROLET SHOULD BE TAKING CARE OF THIS CONCERN FOR THE OWNERS. *TR
NHTSA ODI #10240588
23,957 miles · Jul 7, 2008
Exterior Lighting
I OWN A 2005 TRAILBLAZER LT WITCH I PURCHASED NEW IN JULY 2005. I TOO HAVE EXPERIENCED THE PROBLEM OF FLICKERING HEADLIGHTS AND DASH LIGHTS. I HAVE TAKEN THE VEHICLE TO THE SELLING DEALER SEVERAL TIMES WITH THE PROBLEM, THE LAST TIME IN MAY 2008. THE DEALER HAS NEVER BEEN ABLE TO DUPLICATE THE PROBLEM, HOWEVER, THE LAST TIME …
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I OWN A 2005 TRAILBLAZER LT WITCH I PURCHASED NEW IN JULY 2005. I TOO HAVE EXPERIENCED THE PROBLEM OF FLICKERING HEADLIGHTS AND DASH LIGHTS. I HAVE TAKEN THE VEHICLE TO THE SELLING DEALER SEVERAL TIMES WITH THE PROBLEM, THE LAST TIME IN MAY 2008. THE DEALER HAS NEVER BEEN ABLE TO DUPLICATE THE PROBLEM, HOWEVER, THE LAST TIME I WAS THERE THEY DID PRODUCE A GM DOCUMENT (#2046572) THAT DID ADMIT THERE IS A PROBLEM. THE DOCUMENT STATES "AT THIS TIME, THERE ARE NO REPAIRS FOR THIS CONCERN. ENGINEERING IS REVISITING THIS CONCERN." I ALSO CONSIDER THIS TO BE A SERIOUS SAFETY ISSUE. *TR
NHTSA ODI #10233428
1,500 miles · Jul 6, 2008
Exterior Lighting
DRIVING AT NIGHT THE HEAD LIGHTS DIM THEN BRIGHTEN THE AMP GAUGE DROPS TO 9 THEN RECHARGES AGAIN MAKING THE LIGHTS COME ON BRIGHTER. HAD IT TO THE DEALER AND THEY TELL ME NOTHING IS WRONG WITH IT. *TR
NHTSA ODI #10233311
10,000 miles · Jul 1, 2008
Electrical SystemExterior LightingFuel System, Gasoline
HEADLIGHTS DIM INTERMITTENTLY, HEAT LOOSES POWER AT THE SAME TIME, NOW GETTING FLICKERING OF INTERIOR LIGHTS. WASN'T ABLE TO FIX IT. BUMPER WARPING. GETTING 10 MILES TO THE GALLON! PAINT ON BUTTONS WEARING ON RADIO. SUN ROOF LEAKED PROFUSELY, HAD IT FIXED. REAR WINDOW DEFOGGER DOESN'T WORK. HEAD LINER SAGGED. *TR
NHTSA ODI #10232911
2,000 miles · May 20, 2008
Exterior LightingVehicle Speed Control
TL*THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. WHILE DRIVING AT ANY SPEED, THE CONTACT DEPRESSED THE ACCELERATOR PEDAL, BUT THE VEHICLE DID NOT RESPOND. SIMULTANEOUSLY, THE HEADLIGHTS BEGAN TO DIM AND FLICKER. THE CONTACT DID NOT NOTICE ANY DIFFERENCES IN THE VEHICLE PRIOR TO THE FAILURES. THE VEHICLE HAS NOT BEEN DIAGNOS…
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TL*THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. WHILE DRIVING AT ANY SPEED, THE CONTACT DEPRESSED THE ACCELERATOR PEDAL, BUT THE VEHICLE DID NOT RESPOND. SIMULTANEOUSLY, THE HEADLIGHTS BEGAN TO DIM AND FLICKER. THE CONTACT DID NOT NOTICE ANY DIFFERENCES IN THE VEHICLE PRIOR TO THE FAILURES. THE VEHICLE HAS NOT BEEN DIAGNOSED BY THE DEALER. THE CURRENT MILEAGE WAS 34,000 AND FAILURE MILEAGE WAS 2,000.
NHTSA ODI #10228285
20,000 miles · Feb 4, 2008
Exterior Lighting
HEADLIGHTS ARE CONSTANTLY FLICKERING CAUSING OTHER DRIVERS TO REACT AS IF I'M AN EMERGENCY VEHICLE. *TR
NHTSA ODI #10216931
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.
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