NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
1,466 reports96,000 miles · Mar 19, 2013
Electrical System
MY SPEEDOMETER STARTED TO GO CRAZY JUMPING AROUND WHILE ON THE HIGHWAY IT STARTED OFF READING FINE THEN ALL OF THE SUDDEN IT READ THAT I WAS GOING 120MPH BY THE TIME I GOT HOME IT DID NOT WORK AT ALL HAD TO GUESS MY SPEED THEN ABOUT A TWO WEEKS LATER IT STARTED TO WORK AGAIN SAME DAY IT WENT HAYWIRE AGAIN AND NOW IT DOES NOT WOR…
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MY SPEEDOMETER STARTED TO GO CRAZY JUMPING AROUND WHILE ON THE HIGHWAY IT STARTED OFF READING FINE THEN ALL OF THE SUDDEN IT READ THAT I WAS GOING 120MPH BY THE TIME I GOT HOME IT DID NOT WORK AT ALL HAD TO GUESS MY SPEED THEN ABOUT A TWO WEEKS LATER IT STARTED TO WORK AGAIN SAME DAY IT WENT HAYWIRE AGAIN AND NOW IT DOES NOT WORK AT ALL. ALSO I HAVE BEEN HAVING PROBLEMS WITH BATTERY DRAINING I HAVE BEEN TO SEVERAL PLACES TO GET IT CHECK OUT ALL THAT CAN BE FOUND OUT IS THAT SOMETHING IS STAYING ON WHILE THE CAR IS IN THE OFF POSITION. THERE ARE TIMES WHEN I HAVE TO JUMP MY CAR SEVERAL TIMES IN A DAY AND THERE ARE TIMES WHEN I CAN GO DAYS, WEEKS WITHOUT THE PROBLEM JUST NEVER KNOW WHEN IT IS GOING TO HAPPEN. *TR
NHTSA ODI #10503566
92,600 miles · Mar 16, 2013
Electrical SystemEngine
VEHICLE WOULD NOT START. HAD IT TOWED TO MECHANIC SHOP. BATTERY WAS COMPLETELY DEAD, THOUGH THE BATTERY WAS ONLY 1 YEAR OLD AND WAS A VERY EXPENSIVE AC DELCO 6 YR BATTERY. MECHANIC CHANGED THE ALTERNATOR AND THE BATTERY AND EVERYTHING TESTED THE SAME. PUT OLD BATTERY AND ALTERNATOR BACK IN, AS BATTERY HE CHARGED WAS HOLDING THE…
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VEHICLE WOULD NOT START. HAD IT TOWED TO MECHANIC SHOP. BATTERY WAS COMPLETELY DEAD, THOUGH THE BATTERY WAS ONLY 1 YEAR OLD AND WAS A VERY EXPENSIVE AC DELCO 6 YR BATTERY. MECHANIC CHANGED THE ALTERNATOR AND THE BATTERY AND EVERYTHING TESTED THE SAME. PUT OLD BATTERY AND ALTERNATOR BACK IN, AS BATTERY HE CHARGED WAS HOLDING THE CHARGE OK. COULD NOT LOCATE SOURCE OF PROBLEM. THE NEXT DAY, THE DASH LIGHTS WERE NOT WORKING, NOR THE INTERIOR LIGHTS. AS I DROVE ALONG THE HIGHWAY, THE DASHLIGHTS BLINKED AND THEN STAYED ON. CEILING LIGHT WORKS INTERMITTENTLY. THE ALTERNATOR SHOWS THAT IT IS CHARGING VERY HARD. ACCORDING TO OTHER INCIDENTS REPORTED ON THE INTERNET, THERE IS AN ELECTRICAL PROBLEM IN THE 2005 TRAILBLAZER THAT MAY OR MAY NOT BE ASSOCIATED WITH THE PASSLOCK ANTI-THEFT SYSTEM, BUT IN ANY CASE, SHOWS SLOW LEAK OF ELECTRICAL CURRENT THAT SLOWLY DRAINS THE BATTERY 24/7, UNTIL THE BATTERY IS DEAD. WHY IS NO RECALL ISSUED MAKING GENERAL MOTORS RESPONSIBLE TO FIND AND FIX THIS PROBLEM WITHOUT COST TO THE OWNERS OF 2005 TRAILBLAZERS. I SPENT $130.00 AT THE MECHANIC SHOP AND THEY COULD NOT FIND WHAT THE PROBLEM IS, MUCH LESS FIX IT. MY VEHICLE IS PARKED IN A GARAGE MOST OF THE TIME, AND THERE IS NO REASON FOR THIS MALFUNCTION OTHER THAN FAULTY GM PART SOMEWHERE. OUR LOCAL CHEVY DEALER TOLD ME THEY THINK THE PROBLEM IS RELATED TO THE PASSLOCK ANTI-THEFT SYSTEM BUT THEY HAVE NEVER BEEN ABLE TO NAIL IT DOWN. THEY REFERENCE A VEHICLE WHICH THEY KEPT FOR TWO WEEKS FOR DIAGNOSIS OF A "WON'T START" COMPLAINT, AND THE VEHICLE STARTED SOME DAYS AND NOT OTHER DAYS WITH NO PATTERN TO THE MALFUNCTION. *TR
NHTSA ODI #10503247
113,000 miles · Mar 11, 2013
Electrical System
TL* THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT WHILE DRIVING AT VARIOUS SPEEDS, THE SPEEDOMETER FAILED. THE CONTACT WAS UNABLE TO SEE CURRENT VEHICLE SPEED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS FOUND THAT THE INSTRUMENT CLUSTER HAD FAILED AND NEEDED TO BE REPLACED. THE MANUFACTURER WAS CON…
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TL* THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT WHILE DRIVING AT VARIOUS SPEEDS, THE SPEEDOMETER FAILED. THE CONTACT WAS UNABLE TO SEE CURRENT VEHICLE SPEED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS FOUND THAT THE INSTRUMENT CLUSTER HAD FAILED AND NEEDED TO BE REPLACED. THE MANUFACTURER WAS CONTACTED. THE FAILURE AND CURRENT MILEAGES WERE APPROXIMATELY 113,000. *TR
NHTSA ODI #10502294
127,000 miles · Mar 9, 2013
Electrical System
FIRST MY SPEED GAUGE STARTED GOING CRAZY READING DIFFERENT EVERYTIME I CRANK THE VEHICLE THEN THE ALTERNATOR GAUGE STARTED READING OFF THE CHART MY HIGHEST NUMBER ON THE GAUGE IS 19 IT IS READING AT THE 210 ON THE TEMP GAUGE THAT IS HOW FAR PAST THE 19 IT IS TODAY HOWEVER IT MAY BE DIFFERENT LATER I LOVE CHEVY MY FAMILY ARE ALL …
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FIRST MY SPEED GAUGE STARTED GOING CRAZY READING DIFFERENT EVERYTIME I CRANK THE VEHICLE THEN THE ALTERNATOR GAUGE STARTED READING OFF THE CHART MY HIGHEST NUMBER ON THE GAUGE IS 19 IT IS READING AT THE 210 ON THE TEMP GAUGE THAT IS HOW FAR PAST THE 19 IT IS TODAY HOWEVER IT MAY BE DIFFERENT LATER I LOVE CHEVY MY FAMILY ARE ALL CHEVY PEOPLE AND IT IS SAD THAT CHEVY HAS FORGOTTEN ABOUT THERE CUSTOMERS I AM IN LAW SCHOOL NOT LONG LEFT WHEN I AM FINISHED I AM FILING A SUIT FOR ALL THE PEOPLE WHO OWN THIS VEHICLE CHEVY NEEDS TO STEP UP AN TAKE RESPONSIBILITY IT IS NOT A FLUKE THAT THIS MANY PEOPLE ARE HAVING THE SAME PROBLEMS AND IT IS RIDICULOUS THAT CHEVY HAS DROPPED SO LOW THAT THEY EXPECT US TO JUST EAT THESE PROBLEM WELL QUITE FRANKLY I AM FULL UP OF THE BS I AM ALSO WRITING MY LOCAL PAPER AND NEWS STATION AND I WILL BUG THEM UNTIL THEY RUN AN ARTICLE AND AIR THESE PROBLEMS AN SOME OTHER PROBLEMS THESE VEHICLES ARE HAVING CHEVY WON'T FIX OUR PROBLEMS THEY WON'T LISTEN TO THE ONES WHOM KEEP THEM IN BUSINESS WELL MAYBE THEY WILL LISTEN TO A JUDGE STEP UP CHEVY IT IS CRAZY THAT YOU WON'T TAKE RESPONSIBILITY FOR MALFUNCTIONING PARTS YOU WILL SEE YOUR DAY IN COURT. *TR ## VIN FAILED ##
NHTSA ODI #10502169
112,539 miles · Feb 25, 2013
Electrical SystemFuel/propulsion SystemVehicle Speed Control
THE OIL PRESSURE GAUGE STOPPED WORKING. SECOND INCIDENT AT A LATER DATE, THE SPEEDOMETER STOPPED WORKING CORRECTLY, THIRD INCIDENT AT A DIFFERENT TIME, THE FUEL GAUGE READS INCORRECTLY, FOURTH INCIDENT, THE BATTERY GAUGE IS WORKING SPORADICALLY. MOST OF THE TIME THE GAUGES DO NOT FUNCTION PROPERLY OR NOT AT ALL. *TR
NHTSA ODI #10500065
122,000 miles · Feb 23, 2013
Electrical System
2005 CHEVERLOT TRAILBLAZER HAS HAD AN ISSUE SINCE I PURCHASED IT IN 2004 WITH STALLING OUT. HOWEVER OVER THE LAST 4 YEARS I HAVE HAD AN ISSUE OF NO START... EVERYTHING HAS BEEN REPLACED BY THE DEALER IGNITION SWITCH, ALTERNATOR, STARTER, EXHAUST, ETC.... LAST RESULT WAS THE PCM POWERTRAIN MODULE SUPPOSEDLY THE BRAINS OF THE CAR…
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2005 CHEVERLOT TRAILBLAZER HAS HAD AN ISSUE SINCE I PURCHASED IT IN 2004 WITH STALLING OUT. HOWEVER OVER THE LAST 4 YEARS I HAVE HAD AN ISSUE OF NO START... EVERYTHING HAS BEEN REPLACED BY THE DEALER IGNITION SWITCH, ALTERNATOR, STARTER, EXHAUST, ETC.... LAST RESULT WAS THE PCM POWERTRAIN MODULE SUPPOSEDLY THE BRAINS OF THE CAR. HOWEVER THE SAME DAY IT STALLED AGAIN, MOST RECENTLY MY DEALERSHIP TOOK IT FOR A WEEK AND SAID THEY COULD NOT REDUPLICATE ISSUE. SO THERE AGAIN I AM AT THE SAME PLACE WHERE THE CAR WILL BE FINE FOR WEEKS THEN DO A NO START UNTILL AFTER SERVERAL ATTEMPTS AND SMELL OF GAS FINALLY THE CAR WILL START. CHEVRELOT TRAILBLAZER HAVE KNOWN THIS PROBLEM FOR AWHILE HAS DONE NOTHING ABOUT IT ...RESOLVE THE ISSUE AND DO A RECALL SPENT OVER $10,000 ON JUST MAINTENANCE.. WHAT IS CHEVY GOING TO DO ABOUT THIS ISSUE? *TR ## VIN FAILED ##
NHTSA ODI #10499783
89,000 miles · Feb 20, 2013
Electrical System
SPEEDOMETER JUST STOP WORKING. LEAVING FROM WORK AND SPEEDOMETER WASN'T WORKING, PERIOD. *TR
NHTSA ODI #10499436
60,000 miles · Feb 10, 2013
Electrical SystemFuel System, Gasoline
THE FUEL GAUGE READS EMPTY WHEN THERE IS PLENTY OF GAS IN THE TANK. IT SOMETIMES READ FULL WHEN THERE IS LITTLE GAS LEFT. *TR
NHTSA ODI #10497677
52,000 miles · Feb 8, 2013
Visibility/wiper
TL* THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT DURING INCLEMENT WEATHER, WATER ENTERED THE VEHICLE THROUGH THE WINDSHIELD. THE MANUFACTURER WAS CONTACTED AND STATED THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN ID NUMBER: 05V035000 (VISIBILITY). THE FAILURE MILEAGE WAS 52,000.
NHTSA ODI #10496893
146,000 miles · Feb 7, 2013
Air BagsPower TrainStructureCrashInjury
CRASHED STRAIGHT INTO THE BACK END OF A VEHICLE DOING 60 WHILE I WAS DOING ATLEAST 80, OR 85, MAYBE MORE, I DON'T REMEMBER. THE FIRST THING I REMEMBER SEEING IS REALIZING I'M ALRIGHT DESPITE THE BLOOD IN THE COCKPIT AND ON MY FACE DESPITE SNEEZING WHICH WAS SPREADING BLOOD. IS THIS A VEHICLE DEFECT OR WHAT? MY MATH SAYS T…
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CRASHED STRAIGHT INTO THE BACK END OF A VEHICLE DOING 60 WHILE I WAS DOING ATLEAST 80, OR 85, MAYBE MORE, I DON'T REMEMBER. THE FIRST THING I REMEMBER SEEING IS REALIZING I'M ALRIGHT DESPITE THE BLOOD IN THE COCKPIT AND ON MY FACE DESPITE SNEEZING WHICH WAS SPREADING BLOOD. IS THIS A VEHICLE DEFECT OR WHAT? MY MATH SAYS THAT CRASHING AT 85MPH INTO A VEHICLE DOING 60 IS LIKE CRASHING INTO A BRICK WALL AT 25MPH. I'VE HAD A LOCAL MECHANIC CHECK IT OUT AND HE SAYS ACCORDING TO HIS OBD-II COMPUTER EVERYTHING IS WORKING FINE (OR WAS ATLEAST) :) ANYWAYS, PLEASE FEEL FREE TO CONTACT ME AGAIN WITH ANY MORE QUESTION YOU MAY HAVE. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
NHTSA ODI #10496767
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.