NHTSA owner reports · September 18, 2026 snapshot.
Power Train complaints
10 reportsClear category filter160,000 miles · Dec 6, 2020
Air BagsPower TrainSeat BeltsCrash
YES I WAS DRIVING ON THE 65 MILES AN HOUR IN THE PASSENGER LANE ARE CARPOOL LANE ALL THE SUDDEN FOR NO REASON BOTH CURTAIN AIRBAGS JUST DEPLOYED I HAD MY HEAD RIGHT NEXT TO KNOCK ME OUT COLD I DIDN'T PROCEED OVER AND HIT THE WALL 21 TIMES JUST SKIP DOWN IN WHEN I CAME TO I THOUGHT I WAS I THOUGHT IT AND OTHER VEHICLES LIKELY THA…
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YES I WAS DRIVING ON THE 65 MILES AN HOUR IN THE PASSENGER LANE ARE CARPOOL LANE ALL THE SUDDEN FOR NO REASON BOTH CURTAIN AIRBAGS JUST DEPLOYED I HAD MY HEAD RIGHT NEXT TO KNOCK ME OUT COLD I DIDN'T PROCEED OVER AND HIT THE WALL 21 TIMES JUST SKIP DOWN IN WHEN I CAME TO I THOUGHT I WAS I THOUGHT IT AND OTHER VEHICLES LIKELY THAT WAS NOT THE CASE DID CAUSE SOME TESTA INJURY HURT MIGHT PULL MY CAR ALLEGEDLY FOR MY RIBCAGE IN GOT MY NECK IN MY HEAD I SEE THIS IS HAPPENED MANY TIMES THE 2008 BUT YET THEY KEEP SAYING THERE'S NO PROBLEM THAT EVEN THOUGH IT'S A 2% LEAN AND EXPOSED THE 16 FOR THE ROLE OVER TO KICK IN THAT ESCAPE SCREWING EVERYBODY YEAH THE VEHICLES ON THE HIGHWAY GOING STRAIGHT NO TURNS NO BOMBS NOTHING JUST DEPLOYED I HAVE VIDEO PICTURES OF THE WALL IT SCREWED UP MY RAMS AND OF COURSE THE 4 WHEEL DRIVE MESSED UP AND SHOW THE BACK AXLE IN THE PUMPKIN SO NOW THATS WHINING SO I KNOW IT'S GONNA FAIL SOON POWER STEERING LINKIN TRUCK NEVER LEAD TO DROP ANOTHER WITH SILENT AT THE GREAT V6 IN IT NOW THE FRONT END STEERING ALL SCREWED UP AND I CAN SEE THAT IT'S HAPPENED MANY MANY TIMES BEFORE
NHTSA ODI #11378181
157,000 miles · Nov 30, 2015
Fuel/propulsion SystemPower Train
MY 2008 TRAILBLAZER IS HAVING A ROUGH IDLING ISSUE.. WHEN I FIRST START MY VEHICLE IT DOES NOT WANT TO KEEP RUNNING. IT DOESNT WANT TO MOVE EITHER. IT IS THE THROTTLE POSITION SENSOR AND IT COST 300.00 TO BUY THE PART
NHTSA ODI #10807375
62,916 miles · Sep 1, 2015
Power Train
WHILE DRIVING ON HIGHWAY, STOPPED AT A LIGHT, I WENT TO ACCELERATE AND TRUCK LURCHED FORWARD, MADE A LOUD BANG AND WOULD NOT ENGAGE. THE ENGINE WHINES WHEN ACCELERATOR IS PRESSED, BUT NO MOVEMENT. ALSO, VEHICLE WOULD ROLL BACK WITHOUT THE EMERGENCY BRAKE ON. THERE WERE ZERO WARNINGS PRIOR TO COMPLETE FAILURE OF TRUCK. CONTACTED…
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WHILE DRIVING ON HIGHWAY, STOPPED AT A LIGHT, I WENT TO ACCELERATE AND TRUCK LURCHED FORWARD, MADE A LOUD BANG AND WOULD NOT ENGAGE. THE ENGINE WHINES WHEN ACCELERATOR IS PRESSED, BUT NO MOVEMENT. ALSO, VEHICLE WOULD ROLL BACK WITHOUT THE EMERGENCY BRAKE ON. THERE WERE ZERO WARNINGS PRIOR TO COMPLETE FAILURE OF TRUCK. CONTACTED GM AND CHEVY, AND WAS OFFERED NO HELP, UNTIL OUT OF POCKET DIAGNOSTICS ARE COMPLETED AT A GM/CHEVY DEALER (AND AT THIS POINT SINCE VEHICLE IS OUT OF WARRANTY, OWNER WAS TOLD THAT HELP FROM GM IS NOT GUARANTEED). TRUCK IS AT A PRIVATE SHOP, PRELIMINARY FINDINGS ARE THAT THE FRONT DIFFERENTIAL IS DAMAGED. THE POWER OUTPUT SHAFT AND SPLINE IS STRIPPED, THE CAUSE IS VEHICLE (DRIVETRAIN) DESIGN DOES NOT ALLOW ENGINE OIL TO GET TO THESE COMPONENTS. THE PARTS BECOME DRY AND BRITTLE, WHICH IS WHY THE GEARS ARE STRIPPED AND FAILURE OCCURRED. THIS IS NOT AN OWNER MAINTENANCE ISSUE, BUT A COMPLETE DESIGN FLAW. THESE COMPONENTS SHOULD BE ENCASED AND BE GETTING LUBRICATED FROM THE ENGINE OIL. FURTHER FINDINGS WILL BE REPORTED.
NHTSA ODI #10760680
92,000 miles · Jan 8, 2015
Power Train
LEAVING MY PLACE OF EMPLOYMENT, I MADE A LEFT TURN ON TO THE ROAD. WHILE IN THE TURN, MY SUV BEGAN TO STALL.THE ENGINE MALFUNCTION INDICATOR LAMP CAME ON. I MANAGED TO COAST ON TO SOMEONE'S PROPERTY. I TURNED THE ENGINE OFF AND SAT THERE FOR APPROXIMATELY 15 MINUTES. THEN, I RESTARTED THE ENGINE AND MANAGED TO GET HOME. I USED A…
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LEAVING MY PLACE OF EMPLOYMENT, I MADE A LEFT TURN ON TO THE ROAD. WHILE IN THE TURN, MY SUV BEGAN TO STALL.THE ENGINE MALFUNCTION INDICATOR LAMP CAME ON. I MANAGED TO COAST ON TO SOMEONE'S PROPERTY. I TURNED THE ENGINE OFF AND SAT THERE FOR APPROXIMATELY 15 MINUTES. THEN, I RESTARTED THE ENGINE AND MANAGED TO GET HOME. I USED A SCANNER TO GET THE CODE FOR THE POSSIBLE MALFUNCTION. THE MALFUNCTION WAS LISTED AS P2135, WHICH READ, IN PART "THROTTLE/PEDAL POSITION SENSOR/SWITCH A/B VOLTAGE CORRELATION". THIS SAME PROBLEM WAS CITED IN NHTSA: ACTION NUMBER: 10047220 SERVICE BULLETIN NUMBER: 340852., FOR THE MODEL YEAR 2008. HOWEVER, THE DEALERSHIP AND GM, HAVE STATED THAT MY VEHICLE IS NOT COVERED. THIS IS A GREAT SOURCE OF FRUSTRATION. WITH THE HUNDRED OF THOUSAND OF VEHICLES THAT HAS BEEN RECALLED BY GM FOR A MULTITUDE OF DEFECTS, SOMEHOW THE MODEL YEAR 2008, IS A MODEL OF PERFECTION. FORTUNATE FOR ME, THAT I WAS NOT ON THE FREEWAY WHEN MY VEHICLE BEGAN TO LOOSE POWER. *TR
NHTSA ODI #10671008
69,000 miles · Apr 1, 2014
Electrical SystemPower TrainFire
REPEATED ISSUE. SMELL OF SMOKE/BURNING TRIGGERS DASH WARNING SIGNALS. SAME DASH WARNING SIGNALS COME ON WITHOUT SMELL OF SMOKE/BURNING. CYCLE REPEATS ITSELF WITHOUT PATTERN, AND INCLUDES DURING 4 WHEEL USE. VEHICLE TAKEN TO MULTIPLE CHEVROLET DEALERSHIPS FOR SERVICE (UTAH, NORTH CAROLINA AND WASHINGTON) WITH THE DASH WARNING…
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REPEATED ISSUE. SMELL OF SMOKE/BURNING TRIGGERS DASH WARNING SIGNALS. SAME DASH WARNING SIGNALS COME ON WITHOUT SMELL OF SMOKE/BURNING. CYCLE REPEATS ITSELF WITHOUT PATTERN, AND INCLUDES DURING 4 WHEEL USE. VEHICLE TAKEN TO MULTIPLE CHEVROLET DEALERSHIPS FOR SERVICE (UTAH, NORTH CAROLINA AND WASHINGTON) WITH THE DASH WARNING LIGHTS ON. UTAH AND NC CLAIM UNABLE TO REPLICATE EVENT OR IDENTIFY PROBLEM, SO LISTED AS UNKNOWN WITHOUT CORRECTION. GMC EXECUTIVE OFFICE INTERDICTION RESULTED IN REPLACEMENT OF STEREO EVEN THOUGH DASH LIGHT INDICATE POWERTRAIN & ELECTRICAL. STEREO BROKE 2 MOS LATER. GMEO AND WA IDENTIFIED FUSE ISSUE RELATED TO 4 WHEEL DRIVE, BUT UNABLE TO REPLICATE SMOKE/BURNING BEFORE CLAIMING ISSUE RESOLVED. DASH WARNING LIGHTS CONSTANTLY COME ON AND OFF INDICATING PROBLEM WITH POWERTRAIN/ELECTRICAL. GMEO CLOSED CASE AS RESOLVED. *TR
NHTSA ODI #10576300
32,800 miles · Oct 16, 2012
Electrical SystemPower Train
I BOUGHT THIS VEHICLE BACK IN SEPTEMBER 2009. EVER SINCE I BOUGHT THE VEHICLE I HAVE HAD PROBLEMS WITH THE TRACTION CONTROL LIGHTS COMING ON FOR NO APPARENT REASON. THIS HAPPENS WHEN ITS HOT AND COLD, DRY OR WET. JUST STARTING THE ENGINE MAKES THEN COME ON. I HAVE BEEN BACK TO THE DEALER FOR 2 YEARS NOW FOR THE SAME PROBLEM AND …
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I BOUGHT THIS VEHICLE BACK IN SEPTEMBER 2009. EVER SINCE I BOUGHT THE VEHICLE I HAVE HAD PROBLEMS WITH THE TRACTION CONTROL LIGHTS COMING ON FOR NO APPARENT REASON. THIS HAPPENS WHEN ITS HOT AND COLD, DRY OR WET. JUST STARTING THE ENGINE MAKES THEN COME ON. I HAVE BEEN BACK TO THE DEALER FOR 2 YEARS NOW FOR THE SAME PROBLEM AND THEY TELL ME THAT THEY DON'T KNOW WHY IT IS HAPPENING AND CAN'T FIX IT. MY VEHICLE IS NOW OUT OF WARRANTY AND WILL NEVER BE FIXED. ?*TR
NHTSA ODI #10480742
15,000 miles · Jan 21, 2011
Power Train
TL*THE CONTACT OWNS A 2008 CHEVROLET TRAILBLAZER 4WD. WHILE DRIVING APPROXIMATELY 30 MPH DURING INCLEMENT WEATHER, THE STABILITRAK SERVICE LIGHT CAME ON THE DASHBOARD. SHE STATED THAT THE STABILITRAK DOES NOT WORK WHILE DRIVING OVER AN ICE PATCH. THE VEHICLE WAS TAKEN TO THE DEALER FOR THE FAILURE WHO RESET THE LIGHT. THE VEHIC…
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TL*THE CONTACT OWNS A 2008 CHEVROLET TRAILBLAZER 4WD. WHILE DRIVING APPROXIMATELY 30 MPH DURING INCLEMENT WEATHER, THE STABILITRAK SERVICE LIGHT CAME ON THE DASHBOARD. SHE STATED THAT THE STABILITRAK DOES NOT WORK WHILE DRIVING OVER AN ICE PATCH. THE VEHICLE WAS TAKEN TO THE DEALER FOR THE FAILURE WHO RESET THE LIGHT. THE VEHICLE WAS TAKEN TO THE DEALER AT LEAST SEVEN TIMES FOR THE FAILURE; HOWEVER, THE FAILURE CONTINUED TO OCCUR. THE VEHICLE WAS NOT REPAIRED FOR THE FAILURE. WHILE DRIVING 70 MPH, THE VEHICLE WOULD SHIFT FROM TWO WHEEL TO FOUR WHEEL DRIVE LOW. THE VEHICLE WAS TAKEN TO THE DEALER AND THEY RESET THE LIGHT. OVER A TWO YEAR PERIOD, THE VEHICLE WAS TAKEN BACK AND FORTH TO THE DEALER AND EVENTUALLY THE DEALER REPLACED THE TRANSFER CASE. THE VEHICLE WAS REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 15,000 AND THE CURRENT MILEAGE WAS 70,000.
NHTSA ODI #10378140
26,000 miles · Jun 14, 2010
Power TrainInjury
TL* THE CONTACT OWNS A 2008 CHEVROLET TRAILBLAZER. THE CONTACT WAS EXITING THE VEHICLE WITH THE ENGINE OFF AND THE VEHICLE INDEPENDENTLY BEGAN ROLLING BACKWARD. THE DRIVER'S DOOR KNOCKED HER DOWN AND SHE SUFFERED MINOR INJURIES. THE VEHICLE CONTINUED TO ROLL INTO THE STREET WITHOUT INCIDENT. THE CONTACT DID NOT TAKE THE VEHICLE …
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TL* THE CONTACT OWNS A 2008 CHEVROLET TRAILBLAZER. THE CONTACT WAS EXITING THE VEHICLE WITH THE ENGINE OFF AND THE VEHICLE INDEPENDENTLY BEGAN ROLLING BACKWARD. THE DRIVER'S DOOR KNOCKED HER DOWN AND SHE SUFFERED MINOR INJURIES. THE VEHICLE CONTINUED TO ROLL INTO THE STREET WITHOUT INCIDENT. THE CONTACT DID NOT TAKE THE VEHICLE TO THE DEALER FOR DIAGNOSIS OR REPAIRS. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE AND CURRENT MILEAGES WERE 26,000.
NHTSA ODI #10336221
15 miles · Mar 17, 2010
Power Train
2008 TRAILBLAZER SHAKES FRONT END AT HIGHWAY SPEED, AND TRANSMISSION BOGS DOWN TRAVELING NORMAL SPEED AS WELL. *TR
NHTSA ODI #10320370
1,326 miles · Sep 8, 2008
Power Train
RENTED 2009 CHEVROLET TRAILBLAZER SUV FROM NATIONAL CAR RENTAL ON 8/31/08 WITH 436 MILES ON ODOMETER. DROVE APPROX 800 MILES OVER A PERIOD OF 7 DAYS. ON 9/6/08, WHILE DRIVING ON I-75 SOUTHBOUND AT 70MPH, VEHICLE SHIFTED ITSELF INTO 3RD GEAR, WOULD NOT GO INTO 4TH OR OVERDRIVE. RPM'S AT 70 MPH WERE APPROX 3,500. PULLED OFF …
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RENTED 2009 CHEVROLET TRAILBLAZER SUV FROM NATIONAL CAR RENTAL ON 8/31/08 WITH 436 MILES ON ODOMETER. DROVE APPROX 800 MILES OVER A PERIOD OF 7 DAYS. ON 9/6/08, WHILE DRIVING ON I-75 SOUTHBOUND AT 70MPH, VEHICLE SHIFTED ITSELF INTO 3RD GEAR, WOULD NOT GO INTO 4TH OR OVERDRIVE. RPM'S AT 70 MPH WERE APPROX 3,500. PULLED OFF ROAD AT INTERSTATE EXIT, TRANSMISSION MADE A "CLUNK", JOLTING ME AND MY WIFE RATHER INTENSELY. TOPPED OFF THE FUEL, QUITE GINGERLY BEGAN OUR TRIP AGAIN. AS VEHICLE REACHED 45-50MPH, IT DOWNSHIFTED ITSELF INTO 3RD GEAR, JUMPING THE RPM'S AND CAUSING THE VEHICLE TO LURCH HARSHLY. CALLED NATIONAL, REQUESTED THEY "TALK US IN" TO SAGINAW, MI OFFICE FOR VEHICLE EXCHANGE. NATIONAL REP TOLD ME SHE "COULD NOT READ A MAP" AND "CAN'T TELL WHAT EXIT YOU SHOULD TAKE TO GET HERE". WE ONCE AGAIN PULLED OFF THE ROAD AT AN EXIT, SLOWED TO A STOP, PUT VEHICLE IN PARK WHILE ATTEMPTING TO LOCATE A NATIONAL OFFICE. WHILE ON "HOLD" WITH NATIONAL'S ROADSIDE ASSISTANCE DEPT., DECIDED TO TRY TO GET ON THE ROAD AGAIN. REACHED 40MPH ON I-75, WHEN TRANSMISSION COMPLETELY FAILED. MOTOR REVVED WHEN THROTTLE DEPRESSED, BUT NO FORWARD MOTION OCCURRED. PULLED OFF IN EMERGENCY LANE (NARROW, NEXT TO A STEEP DITCH), AND WERE STUCK THERE FOR NEARLY TWO HOURS WHILE NATIONAL PERFORMED A "TOW-EXCHANGE". EVENTUALLY, ANOTHER VEHICLE WAS BROUGHT OUT, BUT NOT UNTIL AFTER WE WERE STUCK WITH HUGE SEMI TRACTORS RUNNING 80MPH PAST US FOR TWO HOURS, AND HAVING NO MEANS OF SHELTER FROM THE POTENTIAL OF BECOMING "ROADKILL"!! FAILURE OF TRANSMISSION WAS UNPRECEDENTED. VEHICLE DROVE NORMALLY UNTIL IT WOULD NOT SHIFT INTO 4TH / OVERDRIVE. FAILURE WAS PROGRESSIVE AND SEVERE THEREAFTER. *TR
NHTSA ODI #10241343
NHTSA investigations
1RQ17002 · 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.