NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
1,466 reports71,239 miles · Nov 20, 2007
Electrical System
TL*THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE SEAT CONTROLS FAILED AND NO LONGER MOVED THE SEATS PROPERLY. THE FUSES WERE REPLACED, BUT THE CONTACT STATED THAT THEY SMELLED AS IF THEY HAD BURNED NOT LONG AFTERWARDS. SHE HAD THE FUSES TESTED AND WAS INFORMED THAT THERE WAS A SHORTAGE IN THE FUSE…
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TL*THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE SEAT CONTROLS FAILED AND NO LONGER MOVED THE SEATS PROPERLY. THE FUSES WERE REPLACED, BUT THE CONTACT STATED THAT THEY SMELLED AS IF THEY HAD BURNED NOT LONG AFTERWARDS. SHE HAD THE FUSES TESTED AND WAS INFORMED THAT THERE WAS A SHORTAGE IN THE FUSE BOX THAT COULD RESULT IN A FIRE. THE CHEVROLET DEALER STATED THAT THEY WOULD NOT REPAIR THE VEHICLE FOR FREE BECAUSE THE VEHICLE WAS NOT UNDER WARRANTY. THE CONTACT ALSO STATED THAT WHEN SHE APPLIED THE BRAKES, SHE HEARD A CLICKING NOISE COMING FROM THE FUSE BOX. THE VIN, ENGINE SIZE, NUMBER OF CYLINDERS, AND PURCHASE DATE WERE UNKNOWN. THE CURRENT AND FAILURE MILEAGES WERE 71,239.
NHTSA ODI #10209567
Mileage unknown · Nov 17, 2007
Electrical SystemExterior Lighting
PURCHASED 2005 TRAILBLAZER 3/8/05 @ BACON CHEVROLET IN PALESTINE,TX. PROBLEMS: WHILE DRIVING HEADLIGHT & INTERIOR DASHBOARD LIGHTS FLICKER & SHUT OFF, ENGINE LOSES POWER & SURGES LUNGING FORWARD, BATTERY GAUGE DROPS & PEGS OUT, CHECK ENGINE LIGHT COMES ON, DING ALARM, RADIO, ELECTRIC LOCKS, ETC, W/ NO KEY IN IGNITION GO OFF & ON…
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PURCHASED 2005 TRAILBLAZER 3/8/05 @ BACON CHEVROLET IN PALESTINE,TX. PROBLEMS: WHILE DRIVING HEADLIGHT & INTERIOR DASHBOARD LIGHTS FLICKER & SHUT OFF, ENGINE LOSES POWER & SURGES LUNGING FORWARD, BATTERY GAUGE DROPS & PEGS OUT, CHECK ENGINE LIGHT COMES ON, DING ALARM, RADIO, ELECTRIC LOCKS, ETC, W/ NO KEY IN IGNITION GO OFF & ON, NO POWER CANT START VEHICLE. SVC MGR/TECH COMMENTS: CANT DUPLICATE COMPLAINT, NO CODES SHOWING, GM BULLETIN STATING "NORMAL" & WORKING AS DESIGNED, CAN NOT REPLACE OR WORK ON ANYMORE DUE TO TECH/GM MOTORS STATING "NORMAL", OR UNTIL PROBLEM CAN BE DUPLICATED OR UNTIL THEY HAVE A WAY TO FIX. REPAIRS:(TOTAL OF 9 TIMES IN SHOP) 2 HEADLAMP SWITCHES, 1 BATTERY, 3 TIMES WIRING HARNESS GONE THROUGH, NUMEROUS PCM UPDATES/REPROGRAMS, FUEL PRESSURE CHECK, IPC REPROGRAM, DATA RECORDER INSTALLED, REPLACED BCM BODY CONTROL MODULE, WORKORDERS HAVE BEEN ALTERED & WORK STATED DONE THAT HAS NOT BEEN DONE. I HAVE ALL MY WORKORDERS. CONCLUSION: TOOK TO BBB OF TYLER,TX.CS#CHV0592738, HAD ARBITRATION HEARING. BBB'S DECISION WAS THAT THEIR OPINION WAS THAT THE LIGHTS GOING OFF WHILE DRIVING WAS NOT A SAFETY ISSUE. THOUGHT THE BBB WAS SUPPOSE TO BE A CONSUMER ADVOCATE! I FOUND THIS WEBSITE WHILE DOING A COLLEGE RESEARCH PAPER. HOW MANY OTHER CONSUMERS HAVE SAME PROBLEM, BUT DO NOT KNOW ABOUT THIS WEBSITE. WILL ANYTHING BE DONE BEFORE SOMEONE IS KILLED OR IS THAT WHAT IT WILL TAKE! *TR
NHTSA ODI #10209209
5,000 miles · Nov 13, 2007
Electrical SystemExterior Lighting
TL*THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. WHILE THE VEHICLE IS BEING DRIVEN OR IDLING, THE ELECTRICAL SYSTEM SHUTS DOWN. THE FAILURE OCCURRED AT NIGHT WHEN SHUTTING OFF THE HEADLIGHTS AND THE INSTRUMENT PANEL; HOWEVER, THE ENGINE DOES NOT SHUT OFF, ONLY THE ELECTRICAL SYSTEM. THE FAILURE HAS OCCURRED ON SIX OCCASIONS.…
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TL*THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. WHILE THE VEHICLE IS BEING DRIVEN OR IDLING, THE ELECTRICAL SYSTEM SHUTS DOWN. THE FAILURE OCCURRED AT NIGHT WHEN SHUTTING OFF THE HEADLIGHTS AND THE INSTRUMENT PANEL; HOWEVER, THE ENGINE DOES NOT SHUT OFF, ONLY THE ELECTRICAL SYSTEM. THE FAILURE HAS OCCURRED ON SIX OCCASIONS. SPEED WAS NOT A FACTOR. THE DEALER REPLACED ONE OF THE CIRCUIT PANELS, BUT THE ELECTRICAL SYSTEM CONTINUES TO FAIL. THE CONTACT STATED THAT THE DEALER WAS GIVING THEM THE RUN AROUND AFTER EXTENDING THE ELECTRICAL SYSTEM WARRANTY TO 100,000 MILES. SHE ALSO STATED THAT THERE HAS BEEN ELECTRICAL FAILURE SINCE THE VEHICLE WAS PURCHASED. THE PURCHASE DATE WAS UNKNOWN. THE CURRENT MILEAGE WAS 50,000 AND FAILURE MILEAGE WAS 5,000. THE CONSUMER STATED THE PROBLEM STILL EXISTS. UPDATED 12/04/07 *TR
NHTSA ODI #10208766
41,000 miles · Nov 11, 2007
Electrical System
I HAVE A CHEVY TRAILBLAZER 2005 AND THE LIGHTS KEEP FLICKERING AT NIGHT TIME WHEN YOU INCREASE AND DECREASE POWER, I HAVE REPORTED IT BUT NOTHING. *TR
NHTSA ODI #10208617
Mileage unknown · Nov 10, 2007
Structure
THE PART ABOVE THE BACK HATCH (RIGHT ABOVE WINDOW) BLEW OFF WHILE I WAS DRIVING DOWN THE INTERSTATE. AFTER TAKING IT TO THE BODY SHOP FOR AN ESTIMATE-HE STATED THIS HAS HAPPENED TO SEVERAL TRAILBLAZERS. *TR
NHTSA ODI #10208586
10,000 miles · Nov 9, 2007
Electrical System
LIGHTS FLASH DIM THEN BRIGHT SHORTLY AFTER BRAKE IS PRESSED. THE PROBLEM IS INTERMITTENT. *TR
NHTSA ODI #10208509
47,800 miles · Nov 3, 2007
Power Train
TRANSMISSION STARTED ACTING UP ABOUT 2 WEEKS AGO AT RIGHT AROUND 47,000 MILES. IT'S GOTTEN TO WHERE I CANNOT GO MORE THAN 45 MILES AN HOUR OR SO AND IT TAKES ME 5 MINUTES TO ACCELERATE TO THAT POINT. I AM TAKING IT TO THE DEALERSHIP, EVEN THOUGH MY WARRANTY IS EXPIRED BY 11,000 MILES, AND ONE MONTH! *TR
NHTSA ODI #10207821
Mileage unknown · Oct 26, 2007
Electrical SystemExterior Lighting
MY HEADLIGHTS FLICKER AND THE VOLTAGE METER BOUNCES AROUND. THE FLICKERING HEADLIGHTS ARE A DANGER TO MYSELF AND OTHERS AS THOSE AHEAD OF ME THINK I AM TRYING TO FLAG THEM DOWN. *TR
NHTSA ODI #10207048
25,000 miles · Oct 26, 2007
Electrical System
LIGHTS (INTERNAL AND EXTERNAL) DIM OR FLASH WHEN THE GAS IS LET OFF WHILE DRIVING. THIS IS A VERY DANGEROUS SITUATION, PEOPLE PULL OVER, FLASH YOU BACK, AND IN ONE INSTANCE I POLICE OFFICER PULLED ME OVER. IT SEEMS TO HAPPEN WORSE WHEN THE TEMPERATURE IS COLDER THAN 50 DEGREES. IT'S BEEN TO 2 DIFFERENT SERVICE DEPARTMENTS AND IS…
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LIGHTS (INTERNAL AND EXTERNAL) DIM OR FLASH WHEN THE GAS IS LET OFF WHILE DRIVING. THIS IS A VERY DANGEROUS SITUATION, PEOPLE PULL OVER, FLASH YOU BACK, AND IN ONE INSTANCE I POLICE OFFICER PULLED ME OVER. IT SEEMS TO HAPPEN WORSE WHEN THE TEMPERATURE IS COLDER THAN 50 DEGREES. IT'S BEEN TO 2 DIFFERENT SERVICE DEPARTMENTS AND IS STILL UNDER WARRANTY BUT THEY EITHER NEGATE THE PROBLEM AS NORMAL OR CLAIM THEY CAN'T REPLICATE IT. SOME GM EXPLANATIONS REFER TO LOW SPEEDS AND BRIEF DRIVE TIMES, I CAN SAY FIRST HAND IT'S HAPPENED EVERY MILE OF A 300 MILE TRIP, MULTIPLE TIMES. I'VE READ NUMEROUS IDENTICAL COMPLAINTS IN YOUR COMPLAINT DATABASE. IS IT GOING TO TAKE A HORRIBLE ACCIDENT TO GET YOU TO MAKE GM FIX THIS PROBLEM? *TR
NHTSA ODI #10206964
40,000 miles · Oct 21, 2007
Electrical SystemExterior LightingFuel System, Other
MY HEAD LIGHTS AND DASH BOARD LIGHTS DIM AND FLICKER. MY FUEL GAUGE IS NEVER CORRECT IT WILL SHOW EMPTY RIGHT AFTER A FILL-UP. *TR
NHTSA ODI #10206441
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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