NHTSA owner reports · September 18, 2026 snapshot.
Vehicle Speed Control complaints
76 reportsClear category filter62,000 miles · Jul 23, 2014
Electrical SystemEngine And Engine CoolingFuel System, Gasoline
TL* THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. WHILE DRIVING APPROXIMATELY 25 MPH, THE BRAKES FAILED. THE FAILURE OCCURRED INTERMITTENTLY FOR THREE YEARS. THE DEALER WAS UNABLE TO DUPLICATE THE FAILURE. THE MANUFACTURER WAS NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 62,000. THE WINDOW REGULATOR, BATTERY CABLE, TANK LEVEL…
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TL* THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER. WHILE DRIVING APPROXIMATELY 25 MPH, THE BRAKES FAILED. THE FAILURE OCCURRED INTERMITTENTLY FOR THREE YEARS. THE DEALER WAS UNABLE TO DUPLICATE THE FAILURE. THE MANUFACTURER WAS NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 62,000. THE WINDOW REGULATOR, BATTERY CABLE, TANK LEVEL SENSOR, CLUTCH FAN, SERPENTINE BELT, TIGHT OUTER TIE ROD, HOOD LATCH,WATER PUMP, WERE ALL REPLACED. ALSO, THE ROTORS WERE WARPED, DUE TO RUST BY CLIMATE, THE REAR BRAKES PADS WERE WORN AND HAD TO BE REPLACED. THE FRONT ROTORS WERE MACHINED. THERE WAS AN INTERMITTENT SURGE AFTER ACCELERATING FROM A STOP. THERE WAS A SQUEALING NOISE COMING FROM THE BRAKES. THE PASSENGER SIDE BRAKE LIGHTS WERE BLOWING OUT. THE TAIL LIGHT CIRCUIT BOARD WAS REPLACED. THE CHECK ENGINE LIGHT ILLUMINATED, DUE TO A FAULTY EMISSION VENT VALVE AND HOSE ASSEMBLY. THE ABS WAS ENGAGING, WHEN COMING TO A STOP. UPDATED 10/01/14
NHTSA ODI #10615557
52,000 miles · Jul 20, 2014
Electrical SystemFuel System, GasolineVehicle Speed Control
THE VEHICLE PRESENTED WITH ERROR ON READING THE SPEED ONE IS TRAVELING AT. FUEL GAUGE NOT WORKING PROPERLY AND NOT READING GAS CORRECTLY. *TR
NHTSA ODI #10614826
95,000 miles · Jun 5, 2014
Electrical SystemFuel/propulsion SystemVehicle Speed Control
CLUSTER GAUGES ARE GOING OUT. THE SPEEDOMETER QUICK WORKING A FEW YEARS AGO AND IS INTERMITTENT AT BEST ON A DAILY BASIS. IT EITHER INDICATES A LESSER OR GREATER SPEED THAN ACTUAL OR JUST FALLS TO POINT STRAIGHT DOWN. I HAVE BEEN USING A MOUNTED GPS TO INDICATE SPEED. INITIAL REPAIR COST ESTIMATES WERE $500+ FOR THE PARTS SI…
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CLUSTER GAUGES ARE GOING OUT. THE SPEEDOMETER QUICK WORKING A FEW YEARS AGO AND IS INTERMITTENT AT BEST ON A DAILY BASIS. IT EITHER INDICATES A LESSER OR GREATER SPEED THAN ACTUAL OR JUST FALLS TO POINT STRAIGHT DOWN. I HAVE BEEN USING A MOUNTED GPS TO INDICATE SPEED. INITIAL REPAIR COST ESTIMATES WERE $500+ FOR THE PARTS SINCE THEY WILL ONLY REPLACE THE ENTIRE GAUGE CLUSTER. WITH LABOR, THE ESTIMATE WAS IN EXCESS OF $800. FUEL GAUGE IS NOW INOPERATIVE OR INTERMITTENT. WHEN I FILL THE TANK, THE FUEL GAUGE READS WAY PAST THE FULL LINE. HAVING TO RELY OF THE FUEL TO EMPTY AND THE FUEL USED COMPUTER INFORMATION ALONG WITH THE TRIP METER TO ESTIMATE FUEL. RECEIVED ANOTHER ESTIMATE FOR A MECHANIC TO PULL THE GAUGE CLUSTER AND REBUILD EACH INDIVIDUAL GAUGE MOTOR FOR AN ESTIMATE OF $500. BASED UPON THE NUMBER SIMILAR COMPLAINTS ON THIS SAME THING, THIS APPEARS TO BE A MANUFACTURING DEFECT THAT NEEDS TO BE CORRECTED BY GM. *TR
NHTSA ODI #10596333
106,200 miles · Apr 1, 2014
EngineSteeringVehicle Speed Control
WE WERE DRIVING AT ABOUT 55 (WE DON'T KNOW EXACT SPEED AS OUR CONTROL PANEL IS NOT WORKING) AND THE STEERING WENT OUT. IT WAS HARD PULLING TO THE RIGHT AND A FEW TIMES WE COULD NOT CONTROL IT AND WENT OFF THE ROAD. WE HAD ANOTHER INCIDENT LIKE THAT WHEN WE WERE DRIVING IN THE SNOW. WHEN WE PURCHASED THE CAR WE HAD A FUEL ISSU…
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WE WERE DRIVING AT ABOUT 55 (WE DON'T KNOW EXACT SPEED AS OUR CONTROL PANEL IS NOT WORKING) AND THE STEERING WENT OUT. IT WAS HARD PULLING TO THE RIGHT AND A FEW TIMES WE COULD NOT CONTROL IT AND WENT OFF THE ROAD. WE HAD ANOTHER INCIDENT LIKE THAT WHEN WE WERE DRIVING IN THE SNOW. WHEN WE PURCHASED THE CAR WE HAD A FUEL ISSUE THAT COVERED UNDER A RECALL.... NOW OUR WHOLE PANEL IS OUT. WE DON'T KNOW THE SPEED WE ARE GOING, THE OIL LIGHT AND ENGINE LIGHT ARE ALWAYS ON. WE TAKE CARE OF OUR CAR SO WE KNOW ITS NOT LOW ON ANYTHING. *TR
NHTSA ODI #10576118
111,416 miles · Mar 31, 2014
EngineFuel System, GasolineVehicle Speed Control
PROBLEMS WITH MY 2005 CHEVY TRAILBLAZER STARTED WITH A SERIES OF ENGINE LIGHTS, MISFIRING AND STALLING AT LOW SPEEDS AND UPON ACCELERATION. MY THERMOSTAT HAS BEEN REPLACED NUMEROUS AMOUNT OF TIMES . I DO PREVENTATIVE MAINTENANCE TO KEEP MY CAR IN GOOD WORKING CONDITION. I'M A SINGLE PARENT I NEED MY CAR. MY ENTIRE DASHBOARD S…
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PROBLEMS WITH MY 2005 CHEVY TRAILBLAZER STARTED WITH A SERIES OF ENGINE LIGHTS, MISFIRING AND STALLING AT LOW SPEEDS AND UPON ACCELERATION. MY THERMOSTAT HAS BEEN REPLACED NUMEROUS AMOUNT OF TIMES . I DO PREVENTATIVE MAINTENANCE TO KEEP MY CAR IN GOOD WORKING CONDITION. I'M A SINGLE PARENT I NEED MY CAR. MY ENTIRE DASHBOARD STOPPED WORKING AFTER GETTING STUCK ON AND OFF. THE FUEL GAUGE WAS LAST TO GO 3 DAYS AGO. I FILL UP MY TANK IT STILL READS EMPTY WITH THE LIGHT. MY TAILGATE DOOR THE LATCH LOCKS UP. I MANUALLY HAVE TO MOVE TO LATCH SO IT CLOSES. MY DOORS STICKING WHEN THE CAR IS UNLOCKED AND IT HARD TO GET OUT THE LOCKS DON'T UNLATCH THE FIRST TIME. MY CAR IS VERY NICE UNTIL U GET IN IT TO SEE EVERYTHING IS MALFUNCTIONING. I GUESS MY SPEED, GAS LEVEL AND THAT'S NOT COOL. I BEEN GOING THROUGH THESE SAME PROBLEMS SINCE 2011 AND IT'S 2014. THE FUEL GAUGE WAS THE LAST TO GO RECENTLY. WHEN I FILL UP MY TANK IT STILL READS EMPTY WITH THE INDICATOR LIGHT. MY REPAIR WAS $565 WE THOUGHT IT WAS EXHAUST LEAK AND HAD TO REPLACE THE ENTIRE MANIFOLD IT WAS CRACKED... I ABSOLUTELY CAN'T AFFORD ANYTHING ELSE AND I NEED TIRES.PLEASE HELP I'M FURIOUS. . WHEN YOU PURCHASE A VEHICLE YOU EXPECT IT TO LAST. THAT DOESN'T. MY MECHANICS HAVE BEEN THE SAME SINCE DAY ONE AND HAVE GIVEN ME EVERY DISCOUNT AND WARRANTY . I WANT MY VEHICLE REPAIRED I CAN'T PHYSICALLY CAUSE THIS TYPE OF DAMAGE . IT'S INTERNAL AND NOT MY FAULT. I HAVE NEVER HAD A CAR WITH THIS TEMPERAMENT . I HAVE HAD 4 CARS PREVIOUS TO THIS ONE AND THEY LASTED THROUGH THE YEARS UNTIL I DECIDED TO CHANGE CARS. EVERYONE HAS THE SAME PROBLEMS WITH THEIR VEHICLE AS I DO . HOW IS THAT POSSIBLE? MANUFACTURERS SHOULD VALUE QUALITY NOT QUANTITY. I HAVE EVERY SINGLE DOCUMENT TO VERIFY THIS AS WELL AS MY MECHANICS. I WOULD LIKE MY VEHICLE REPAIRED AND TO BE REIMBURSED. *TR
NHTSA ODI #10575963
69,000 miles · Nov 30, 2013
Electrical SystemVehicle Speed Control
DRIVING ON THE HIGHWAY TO THE SHORE MY SPEEDOMETER INCREASED TO 95 MPH. WHEN WE PARKED IT WAS STUCK ON 10. SINCE THEN IT HAS HAPPENED MANY TIMES. WHEN I PARK I HAVE TO CHECK WHAT IT STOPS AT. SOMETIMES, ITS 10, 20, 30, ETC. I HAVE TRIED DISCONNECTING THE NEGATIVE BATTERY CABLE AND THAT HELPS AS A TEMP FIX. MY DEALER SAYS T…
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DRIVING ON THE HIGHWAY TO THE SHORE MY SPEEDOMETER INCREASED TO 95 MPH. WHEN WE PARKED IT WAS STUCK ON 10. SINCE THEN IT HAS HAPPENED MANY TIMES. WHEN I PARK I HAVE TO CHECK WHAT IT STOPS AT. SOMETIMES, ITS 10, 20, 30, ETC. I HAVE TRIED DISCONNECTING THE NEGATIVE BATTERY CABLE AND THAT HELPS AS A TEMP FIX. MY DEALER SAYS THERE IS NO RECALL, BUT I SAW ONLINE A CLASS ACTION SUIT AGAINST GM, BUT NOT FOR TRAILBLAZERS. THIS IS A GM ISSUE AND I DON'T HAVE THE MONEY TO GET IT FIXED. UPDATED 03/11/14
NHTSA ODI #10554183
148,605 miles · Nov 22, 2013
Electrical SystemVehicle Speed Control
I WAS DRIVING ON THE HIGHWAY WHEN I SLOWED DOWN & STOPPED FOR AN ACCIDENT AHEAD OF ME. I DID NOT SLAM ON MY BRAKES AND I DID NOT GO OVER ANY BUMPS THAT WOULD JAR THE VEHICLE. I WAS STOPPED FOR APPROXIMATELY 20 MINUTES. WHEN I BEGAN ACCELERATING I NOTICED THE SPEEDOMETER WAS NO LONGER ACCURATELY READING MY SPEED. I WAS DOING…
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I WAS DRIVING ON THE HIGHWAY WHEN I SLOWED DOWN & STOPPED FOR AN ACCIDENT AHEAD OF ME. I DID NOT SLAM ON MY BRAKES AND I DID NOT GO OVER ANY BUMPS THAT WOULD JAR THE VEHICLE. I WAS STOPPED FOR APPROXIMATELY 20 MINUTES. WHEN I BEGAN ACCELERATING I NOTICED THE SPEEDOMETER WAS NO LONGER ACCURATELY READING MY SPEED. I WAS DOING AROUND 50 MPH, BUT MY SPEEDOMETER WAS READING 22 MPH. I TRIED TURNING THE CAR OFF ONCE I GOT HOME, THEN RESTARTING IT, BUT IT WAS STILL READING 22 MPH. WHEN I DROVE IT THE NEXT DAY, IT STARTED OUT READING 10 MPH, AND HAS VARIED SINCE THEN, BUT STILL NOT READING ACCURATELY. *TR
NHTSA ODI #10553310
Mileage unknown · Nov 7, 2013
Electrical SystemExterior LightingVehicle Speed Control
I WENT INTO TOWN TO GRAB DINNER AND AS I AM DRIVING ALONG, MY HEADLIGHTS SHUT OFF. THE ONLY THING THAT REMAINED ON, WERE THE ORANGE TURN SIGNAL LIGHTS. I FRANTICALLY TURNED THE HEADLIGHT KNOB ON AN OFF AND NOTHING HAPPENED. I WAS LOOKING FOR A PLACE TO TURN OFF THE HIGHWAY, HOWEVER IT WAS NIGHT TIME AND I HAD NO HEADLIGHTS. I EN…
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I WENT INTO TOWN TO GRAB DINNER AND AS I AM DRIVING ALONG, MY HEADLIGHTS SHUT OFF. THE ONLY THING THAT REMAINED ON, WERE THE ORANGE TURN SIGNAL LIGHTS. I FRANTICALLY TURNED THE HEADLIGHT KNOB ON AN OFF AND NOTHING HAPPENED. I WAS LOOKING FOR A PLACE TO TURN OFF THE HIGHWAY, HOWEVER IT WAS NIGHT TIME AND I HAD NO HEADLIGHTS. I ENDED UP PULLING OVER TO THE GRAVEL SIDE OF THE ROAD, AND TURNED THE CAR OFF. NOW I AM STUCK ON THE SIDE OF THE HIGHWAY AT NIGHT TIME, WITH NO WORKING HEADLIGHTS. I TURNED THE CAR OFF AND GOT OUT, TAPPED THE HEADLIGHTS AND LOOKED FOR ANY PHYSICAL DAMAGE AND DID NOT FIND AN ANSWER. UPON STARTING THE CAR AGAIN, IT SOUNDED LIKE SOMEONE HAD TURNED ON A VACUUM CLEANER. THE NOISE PITCHED UP FOR ABOUT 5 SECONDS BEFORE PITCHING BACK DOWN. AFTER RE-STARTING THE OIL PRESSURE GAUGE MOVED FROM ITS NORMAL POSITION AT "12 O'CLOCK" TO AN ABNORMAL "6 O'CLOCK". I TRIED TO CALL ONSTAR FOR A VEHICLE DIAGNOSTIC, HOWEVER NOW MY RADIO WOULD NOT WORK EITHER. I TRIED THE HEADLIGHTS AGAIN, AND THEY STILL WOULD NOT TURN ON. I TURNED ON MY HIGH BEAMS, AND PROCEEDED BACK HOME. WHILE EN ROUTE MY SPEEDOMETER WAS READING 10MPH OVER MY ACTUAL SPEED. WHEN I PULLED INTO MY DRIVEWAY AND TURNED THE CAR OFF, THE SPEEDOMETER STAYED AT 10MPH. I FIND IT VERY HARD TO BELIEVE THAT ALL OF THESE THINGS HAPPENED ALL AT ONCE AS A COINCIDENCE. THIS IS A HUGE SAFETY CONCERN AS I LOST THE ABILITY TO SEE AT NIGHT, AS WELL AS THE ABILITY TO MONITOR MY SPEED ALL WHILE TRYING TO DRIVE. NOT TO MENTION ALL OF THE MOTORISTS WHO WERE BLINDED BY MY HIGH BEAMS ON THE WAY BACK. *TR
NHTSA ODI #10551456
50,000 miles · Oct 16, 2013
Electrical SystemVehicle Speed Control
BOUGHT THIS VEHICLE USED IN OCT 2010. NOT LONG THEREAFTER, NOTICED THE SPEEDOMETER WOULDN'T WORK ALL THE TIME - NORMALLY IT WORKS WHEN I FIRST START DRIVING BUT WHEN THE VEHICLE WARMS UP, IT STOPS WORKING ALL TOGETHER. I THINK IT'S A SAFETY ISSUE IF YOU DO NOT KNOW HOW FAST YOU ARE GOING. THE CRUISE CONTROL ALSO DOESN'T WORK …
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BOUGHT THIS VEHICLE USED IN OCT 2010. NOT LONG THEREAFTER, NOTICED THE SPEEDOMETER WOULDN'T WORK ALL THE TIME - NORMALLY IT WORKS WHEN I FIRST START DRIVING BUT WHEN THE VEHICLE WARMS UP, IT STOPS WORKING ALL TOGETHER. I THINK IT'S A SAFETY ISSUE IF YOU DO NOT KNOW HOW FAST YOU ARE GOING. THE CRUISE CONTROL ALSO DOESN'T WORK ONCE IN A WHILE. MOST OF THE TIME IT DOES, BUT OCCASIONALLY I CAN'T GET IT TO GO ON AT ALL. *TR
NHTSA ODI #10548108
Mileage unknown · Jun 17, 2013
Fuel/propulsion SystemVehicle Speed Control
AFTER FILLING UP MY GAS TANK THE FUEL SENSOR READ EMPTY AND THE GAS LIGHT WAS ON. ALSO, WHIEL DRIVING THE FUEL SENSOR WOULD JUMP AROUND SHOWING EMPTY, FULL AND THE GAS LIGHT WOULD COME ON. THE VEHCILE WAS STILL UNDER WARRANTY AT THE TIME SO I TOOK IT TO THE DEALERSHIP TO HAVE IT REPAIRED. THE SERVICE REP AT THE DEALERSHIP INIDCA…
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AFTER FILLING UP MY GAS TANK THE FUEL SENSOR READ EMPTY AND THE GAS LIGHT WAS ON. ALSO, WHIEL DRIVING THE FUEL SENSOR WOULD JUMP AROUND SHOWING EMPTY, FULL AND THE GAS LIGHT WOULD COME ON. THE VEHCILE WAS STILL UNDER WARRANTY AT THE TIME SO I TOOK IT TO THE DEALERSHIP TO HAVE IT REPAIRED. THE SERVICE REP AT THE DEALERSHIP INIDCATED THAT IT WAS A COMMON PROBLEM WITH THE FUEL SENSOR AND IT WOULD NEED TO BE REPLACED. HE MENTIONED THAT I WAS LUCKY THE VEHICLE WAS STILL UNDER WARRANTY BECAUSE THE REPAIR WAS VERY COSTLY. MY VEHICLE OCCASSIONALY LURCHES WHEN IT PUT INOT GEAR FROM BEING PARKED OR IDLE AS IF IT WANTS TO JUST TAKE OFF RIGHT AWAY. I CONTACTED GM ON THIS AND THEY STATED THERE WAS NOTHING THEY COULD DO, BUT I HAVE RESEARCHED AND FOUND THAT MANY OTHERS HAVE HAS THIS SAME PROBLEM. ANOTHER ISSUDE I HAVE HAD WAS MY SPEEDOMETER AND ENTIRE DASH CLUSTER FAILING. WHILE DRIVING ON THE INTERSTATE MY SPEEDOMETER JUMPED TO OVER 100 MPH AND THEN BACK DOWN TO 0. AT THAT POINT IT STOPPED WORKING FOR A FEW MINUTES THEN STARTED WORKING PROPERLY AGAIN. FINALLY IT STOPPED WORKING ALTOGETHER. I TOOK IT TO MY MECHANIC AND HE REPLACED THE ENITRE CLUSTER PANEL WHICH COST ME AROUND $800.00. AGAIN, HE DID SOME RESEARCH AND FOUND THIS TO BE A COMMON PROBLEM. I SENT GM A LETTER WITH A COPY OF THE REPAIR BILL ALONG WITH DOCUMENTATION OF THE MANY COMPLAINTS I FOUND ONLINE WITH THE SAME ISSUE. I HEARD NOTHING. I REACHED OUT WITH A PHONE CALL AND WAS TOLD THE ISSUE DID NOT WARRANT A RECALL. THIS COULD BE A SERIOUS SAFETY ISSUE. PLEASE CONSIDER A RECALL AS IT APPERAS THIS VEHICLE WAS JUST POORLY MADE AND MANY OTHER PEOPLE ARE EXPERIENCING THE SAME ISSUES. *TR
NHTSA ODI #10520074
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.