Electrical System. Review the 617 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Fuel System, Gasoline. Review the 435 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Exterior Lighting. Review the 140 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

59 crash reports25 fire reports41 injury reports

Electrical System complaints

617 reports

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40,000 miles · Feb 16, 2009

Electrical System

SPEEDOMETER IS NOT WORKING PROPERLY. SOMETIMES WORKS, SOMETIMES NOT. CANNOT ACCURATELY GAUGE WHAT SPEED YOU'RE TRAVELLING. *TR

NHTSA ODI #10258843

50,000 miles · Feb 16, 2009

Electrical SystemFuel System, GasolineInterior Lighting

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JUST WANT TO ADDRESS THE GAS GAUGE AND SPEEDOMETER ISSUES. I HAVE A 05 TRAILBLAZER AND HAD BOTH OF THESE PROBLEMS. FORTUNATELY I WORK WITH A GREAT DEALERSHIP AND I PURCHASED THE EXTENDED WARRANTY BECAUSE GM WOULD DO NOTHING AND THE FIXES ARE VERY EXPENSIVE. YOU CAN LIVE WITH THE GAS GAUGE NOT READING CORRECTLY BY TRACKING YOUR MILEAGE BUT THE STUPID BELL GOES OFF ALL THE TIME TELLING YOU YOUR NEAR EMPTY BUT YOU CANNOT DRIVE SAFELY IF YOU DO NOT KNOW HOW FAST YOU ARE GOING AND YOU CERTAINLY CANNOT GO WITH THE FLOW AS EVERYONE SEEMS TO DRIVE FASTER THAN ALLOWED AND I DO NOT THINK THE OFFICER WHO PULLS YOU OVER WILL CARE IF YOUR SPEEDOMETER DOES NOT WORK. I ALSO NOTICE THAT MY INTERIOR PANEL LIGHTS WILL FLASH OFF AND BACK ON AGAIN, MAKES ME THINK I AM SEEING THINGS. I THINK GM NEEDS TO FIND ANSWERS AND FIX THESE PROBLEMS. I LOVE MY TB BUT IT JUST SEEMS LIKE A LEMON AND I WILL LOOK AT SOMETHING DIFFERENT WHEN I PURCHASE AGAIN. *TR

NHTSA ODI #10258782

49,500 miles · Feb 16, 2009

Electrical System

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WHEN DRIVING SOMETIMES LIGHTS WILL BECOME DIM. WHEN ADJUSTING SEAT TO DRIVERS SIDE MIRROR ALSO TURNS UPWARD. IF OPENING RIGHT SIDE PASSENGER DOOR IN BACK WITH RADIO ON, RADIO GETS TERRIBLE BUZZING NOISE. I HAVE TO SHUT VEHICLE OFF AND TURN BACK ON AGAIN. ALSO MY CD PLAYERS HAS QUIT WORKING FOR NO REASON AT ALL AND GETS VERY HOT AND ALSO SOMETIMES WHEN YOU START VEHICLE THE MILEAGE GAUGE WILL NOT WORK. HAVE TO SHUT VEHICLE OFF AND RESTART SOMETIMES. THIS IS A 2005 TRAILBLAZER. *TR

NHTSA ODI #10258781

70,194 miles · Feb 11, 2009

Electrical SystemFuel System, Gasoline

1. CHECK ENGINE LIGHT STAYS ON CONSISTENTLY NO MATTER WHAT REPAIRS I HAVE DONE. 2. SPEEDOMETER FAILS TO CONSTANTLY. I RECENTLY GOT A SPEEDING TICKET FOR NOT STAYING WITHIN SPEED LIMIT. 3. DEALERSHIP HAS CONSTANTLY SAID THEY HAVE NOT HEARD OF ANY COMPLAINTS BY ANY CONSUMERS. 4. ONSTAR SYSTEM HAS FAILED FROM A YEAR AFTER PURCHA…

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NHTSA ODI #10258414

50,000 miles · Feb 11, 2009

Electrical System

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WHEN DRIVING AT NIGHT AND NOT ON THE THROTTLE THE HEADLIGHTS AND INSTRUMENT LIGHTS FLASH ON AND OFF IN MY 05 TRAILBLAZER. IT DOES IT EVERY NIGHT AS I DRIVE HOME AND CAUSES PEOPLE AROUND ME TO DRIVE ERRATICALLY. THE TRUCK ALSO SUDDENLY REVS WHILE COMING TO A STOP. TWICE IT HAS CAUSED ME TO TAP THE PERSON IN FRONT OF ME WHILE MY HEADLIGHTS ARE FLASHING SO IT BADLY SCARES PEOPLE AROUND ME. THE DEALERSHIP CLAIMS THEY CAN FIND NO FAULT IN THE TRUCK BUT THE PROBLEMS ARE BECOMING SO BAD THAT I AM AFRAID TO DRIVE THE TRUCK AND THAT IS A VERY BAD PLACE TO BE STUCK IN. I HAVE READ THAT MORE THEN A FEW PEOPLE HAVE THESE ISSUES AND THAT THERE IS NO FIX ACCORDING TO GM- SO I FELT THAT I HAD BETTER REPORT THIS HERE AS WELL. *TR

NHTSA ODI #10258317

53,300 miles · Feb 5, 2009

Electrical SystemExterior Lighting

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THE SPEEDOMETER STICKS AT VARIOUS SPEEDS. SOMETIMES IT SHOWS *BELOW* ZERO WHEN I'M MOVING. LAST NIGHT, I WAS TRAVELING AT APPROX. 65-70MPH, I ASSUME, BUT THE SPEEDOMETER WAS STUCK AT 30. WHEN DECELERATING, THE SPEEDOMETER WILL STICK AT CERTAIN SPEEDS, AND THEN JERK DOWN SUDDENLY. MY TRAILBLAZER ONLY HAS ABOUT 53,000 MILES ON IT. I HAVE SEEN REPORTS OF THIS ISSUE BEGINNING AT 30K, BUT MOST KICK IN AT AROUND 50K. I AM CALLING THE SHOP TODAY. FROM WHAT I'VE READ, IT'S RELATED TO A FAULTY STEPPER MOTOR. IF I AM ABLE TO UPDATE THIS REPORT, I WILL. HOWEVER, I THINK THIS IS VERY UNSAFE AND AM NOT GOING TO WAIT TO REPORT IT UNTIL AFTER THE REPAIR; I'VE SEEN AT LEAST 40 (I STOPPED COUNTING) OTHER COMPLAINTS ABOUT A MALFUNCTIONING SPEEDOMETER IN 05 TRAILBLAZERS ON ABOUTAUTOMOBILE.COM (I ALSO HAVE ISSUES WITH DIMMING LIGHTS AND HEADLIGHTS FLASHING AT NIGHT). *TR

NHTSA ODI #10257547

36,000 miles · Jan 25, 2009

Electrical System

THE FUEL GAUGE DOES NOT WORK PROPERLY. IT MAY SHOW EMPTY, QUARTER,OR HALF FULL EVEN THOUGH IT IS FULL. I SEE A LOT OF PEOPLE HAVE THIS PROBLEM. THERE SHOULD BE A RECALL!! IT'S NO WONDER THEY CAN'T SELL THEM!! *TR

NHTSA ODI #10256294

69,450 miles · Jan 20, 2009

Electrical System

SPEEDOMETER DOES NOT READ CORRECTLY. READS AT 120 MPH REGARDLESS WHAT SPEED YOU ARE DRIVING. HAVE READ ABOUT TOO MANY COMPLAINTS REGARDING THIS SAME PROBLEM. WHY NO RECALL? *TR

NHTSA ODI #10255625

59,170 miles · Jan 17, 2009

Electrical System

MY SPEEDOMETER ISN'T WORKING PROPERLY AND I CAN BE GOING APPROXIMATELY 60 MILES PER HOUR ON THE HIGHWAY AND THE GAUGE SHOWS THAT I AM GOING 25/30 MILES AN HOUR AND I RESEARCHED THIS ON THE INTERNET AND IT SHOWS OTHER COMPLAINTS RELATING TO THE SAME PROBLEM...WHY HASN'T GM RECALLED THIS PROBLEM ON THE 2005 MODELS? *TR

NHTSA ODI #10255389

65,000 miles · Jan 17, 2009

Electrical System

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AFTER I HAVE BEEN DRIVING FOR 20-30 MINUTES MY SPEEDOMETER STOPS FUNCTIONING. IN CITY DRIVING SITUATIONS, THE SPEEDOMETER NEEDLE DROPS TO ZERO AND STAYS THERE FOR THE ENTIRE TRIP. IN HIGHWAY DRIVING SITUATIONS WHEN THE CRUISE CONTROL IS IN USE, THE SPEEDOMETER "STICKS." WHEN I TOUCH THE BREAKS OR THE GAS TO SPEED UP/SLOW DOWN THE SPEEDOMETER NEEDLE STAYS AT WHATEVER SPEED I WAS PREVIOUSLY DRIVING AND STAYS THERE FOR THE REST OF THE TRIP. ONCE THE CAR HAS BEEN PARKED AND TURNED OFF FOR APPROXIMATELY AN HOUR, THE SPEEDOMETER CAN BE RESET BY STARTING THE CAR AND TURNING IT OFF UNTIL THE NEEDLE RETURNS TO ZERO. THIS PROBLEM STARTED WHEN MY TRAILBLAZER HAD APPROXIMATELY 55,000 MILES AND HAS PERSISTED SINCE. THE DEALERSHIP TOLD ME THAT THIS PROBLEM ISN'T COVERED UNDER THE WARRANTY AND I WOULD BE RESPONSIBLE FOR THE $450-550 COST TO REPLACE THE INSTRUMENT CLUSTER. THEY ALSO SAID THAT THIS IS A PREVALENT PROBLEM WITH 2005 TRAILBLAZERS BUT IT WON'T BE COVERED UNDER A SILENT WARRANTY UNLESS MORE COMPLAINTS ARE FILED. THIS IS A SERIOUS AND POTENTIALLY DANGEROUS PROBLEM THAT CAN CAUSE SERIOUS ACCIDENTS AND DEATHS, AND I BELIEVE CHEVY SHOULD BE RESPONSIBLE FOR ENSURING THEIR VEHICLES ARE SAFE FOR THEIR CUSTOMERS TO DRIVE. *TR

NHTSA ODI #10255385

Official recalls

06V417000 · Air Bags:frontal

Oct 31, 2006

CERTAIN VEHICLES ORIGINALLY BUILT WITH CLOTH SEATS THAT WERE EQUIPPED WITH AN AUTOMATIC AIR BAG PASSENGER SENSING SYSTEM AND LATER REUPHOLSTERED WITH AFTERMARKET LEATHER SEAT COVER KITS ARE INVOLVED. TESTING HAS INDICATED THAT THE AFTERMARKET LEATHER SEAT COVERS CAN CAUSE THE PASSENGER SENSING SYSTEM TO MALFUNCTION.

Consequence & remedy

Consequence: IF THE PASSENGER SENSING SYSTEM MALFUNCTIONS, THE FRONT AIR BAG ON THE PASSENGER SIDE MAY BE DISABLED WHEN IT SHOULD BE ENABLED, OR ENABLED WHEN IT SHOULD BE DISABLED. IN EITHER CASE, IN THE EVENT OF A CRASH THAT REQUIRES AIR BAG DEPLOYMENT, A FRONT PASSENGER'S LEVEL OF INJURY MAY BE INCREASED.

Remedy: BECAUSE A REPLACEMENT LEATHER SEAT COVER THAT IS COMPATIBLE WITH THE PASSENGER SENSING SYSTEM IS NOT AVAILABLE, GENERAL MOTORS (GM) WILL REPURCHASE THESE VEHICLES IN ACCORDANCE WITH THE TERMS STATED IN GM'S LETTER TO OWNERS. THE RECALL BEGAN ON NOVEMBER 6, 2006. OWNERS SHOULD CONTACT GM AT 1-877-477-1022 TO BEGIN THE PROCESS OF REPURCHASING THEIR VEHICLE.

05V035000 · Visibility:windshield

Feb 3, 2005

CERTAIN SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 212, 'WINDSHIELD MOUNTING.' THE WINDSHIELD URETHANE BEAD MAY NOT HAVE ADHERED TO THE BODY IN CERTAIN AREAS DURING THE CURE PROCESS.

Consequence & remedy

Consequence: IF A CRASH OCCURS, THE WINDSHIELD MAY NOT BE RETAINED, INCREASING THE RISK OF INJURY TO A VEHICLE OCCUPANT.

Remedy: DEALERS WILL REPLACE THE WINDSHIELD FREE OF CHARGE. THE RECALL BEGAN ON MARCH 10, 2005. OWNERS MAY CONTACT BUICK AT 1-866-608-8080, CHEVROLET AT 1-800-630-2438, OR GMC AT 1-866-996-9463.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

RQ17002 · 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

Fuel System, Other:storage:fuel Gauge System