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2004 Chevrolet Trailblazer

Owner reports · Recalls · Investigations

More warning signs than most Trailblazer years

Owner complaints for the 2004 Chevrolet Trailblazer are substantially higher than the model-year median of 87.5.

About this comparison →

When problems were reported

Mileage at the reported incident

899 reports with mileage · 182 unknown

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Electrical System. Review the 627 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Exterior Lighting. Review the 101 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Fuel System, Gasoline. Review the 93 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

56 crash reports31 fire reports47 injury reports

Suspension complaints

14 reports
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160,000 miles · Sep 27, 2018
StructureSuspension

TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE UNDERCARRIAGE OF THE VEHICLE WAS SEVERELY RUSTED. THE CONTACT BECAME AWARE OF THE CORROSION BY VISIBLY INSPECTING THE VEHICLE. THE CONTACT STATED THAT THE REAR STABILIZER BAR WAS TOTALLY RUSTED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE I…

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TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE UNDERCARRIAGE OF THE VEHICLE WAS SEVERELY RUSTED. THE CONTACT BECAME AWARE OF THE CORROSION BY VISIBLY INSPECTING THE VEHICLE. THE CONTACT STATED THAT THE REAR STABILIZER BAR WAS TOTALLY RUSTED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE INSPECTED. THE CONTACT WAS INFORMED THAT THE SUBFRAME THAT SUPPORTED THE REAR SUSPENSION NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. A DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOTIFIED AND PROVIDED CASE NUMBER: 8-4669457241. THE APPROXIMATE FAILURE MILEAGE WAS 160,000.

NHTSA ODI #11131964

3 miles · Oct 17, 2017
Power TrainSuspension

CERTAIN SPORT UTILITY VEHICLES EQUIPPED WITH 4 -WHEEL DRIVE FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 101, NO. 110, NO. 114, NO. 225, NO. 209, & NO. 208. VECHICLES WERE BUILT WITH A LEFT -FRONT BRAKE PIPE WITH A CIRCUMFERENTIAL SCORE AT A RANDOM LOCATION ALONG THE LENGHT OF THE PIPE AS THE…

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CERTAIN SPORT UTILITY VEHICLES EQUIPPED WITH 4 -WHEEL DRIVE FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 101, NO. 110, NO. 114, NO. 225, NO. 209, & NO. 208. VECHICLES WERE BUILT WITH A LEFT -FRONT BRAKE PIPE WITH A CIRCUMFERENTIAL SCORE AT A RANDOM LOCATION ALONG THE LENGHT OF THE PIPE AS THE RESULT OF THE MANUFACTURING PROCESS. IF THE BRAKE PIPE PARTIALLY OR FULLY FRACTURED,BRAKE PEDAL TRAVEL WOULD IMMEDIATELY INCREASE AND FRONT BRAKE PERFORMANCE WOULD BE REDUCED UNDER CERTAIN CIRCUMSTANCES THE FRONT LOWER CONTROL ARM BRACKETS MAY FRACTURE. MISSING WELDS ON THE REAR FLOW PLAN THE CALIBRATION OF THE TRANSFER CASE CONTROL MODULE COULD CAUSE INSUFFICIENT HIGH SPEED GEAR ENGAGEMENT. THIS FRACTURE COULD RESULT IN SEPARATION OF THE FRONT LOWER CONTROL ARM FROM THE FRAME SOME OF THESE VEHICLES WERE BUILT WITH A RANGE SHIFT COLLAR IN THE TRANSMISSION TRANSFER CASE THAT CONTAINS CRACKS.

NHTSA ODI #11034190

122,494 miles · Sep 17, 2015
StructureSuspensionWheelsCrashInjury

DRIVING I-85 NORTH BOUND ON THE MORNING ON 6/15/2015 HEADED TO WORK WHEN THE REAR PASSENGER TIRE BLEW OUT CAUSING MY 2004 CHEVROLET TRAILBLAZER TO CROSS OVER INTO ANOTHER LANE THEN BACK INTO THE LANE I WAS IN, SPIN UNCONTROLLABLE, ALL OF A SUDDEN THE STEERING WHEEL STARTED SPINNING AND THEN THE VEHICLE JUST SHUT DOWN, STEERING W…

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DRIVING I-85 NORTH BOUND ON THE MORNING ON 6/15/2015 HEADED TO WORK WHEN THE REAR PASSENGER TIRE BLEW OUT CAUSING MY 2004 CHEVROLET TRAILBLAZER TO CROSS OVER INTO ANOTHER LANE THEN BACK INTO THE LANE I WAS IN, SPIN UNCONTROLLABLE, ALL OF A SUDDEN THE STEERING WHEEL STARTED SPINNING AND THEN THE VEHICLE JUST SHUT DOWN, STEERING WHEEL LOCKS, THE CAR COMES TO A STOP AND SLAMS INTO A GUARD RAIL WHERE I AM FACING SOUTH BOUND TRAFFIC, NONE OF MY AIR BAGS DEPLOY, I HAVE A NECK AND BACK INJURY THAT TO THIS DAY I AM STILL BEING TREATED FOR AND MY PASSENGER WHO WAS A COWORKER RIDING TO WORK WITH ME THAT MORNING ALSO HAD A BACK INJURY. MY VEHICLE WAS DEEMED A TOTAL LOSS BY INSURANCE COMPANY COULD NOT BE REPAIRED, LOST TIME FROM WORK, STILL HAVE MEDICAL BILLS, OCCURRING, ALTHOUGH I HAVE FULL COVERAGE INSURANCE BUT BECAUSE IT WAS A ONE VEHICLE ACCIDENT THERE IS NOTHING THAT CAN BE DONE ABOUT LOSS WAGES. JUST HAD THESE TIRES PUT ON MY TRUCK ABOUT 6 MONTHS AGO, HEARD ABOUT PEOPLE PASSING THESE BAD TIRES ON AS NEW TIRES , DON'T KNOW IF THIS IS THE CASE OR NOT. DON'T KNOW WHY AIR BAGS DID NOT DEPLOY, DON'T KNOW WHY STEERING WHEEL SPIN THEN LOCKED UP, THANK GOD IT WAS NOT WORSE! STATE TROOPER SAID IT COULD HAVE BEEN WORSE FROM THE WAY I LANDED.

NHTSA ODI #10764520

134,000 miles · Jan 11, 2015
Electrical SystemElectronic Stability Control (esc)Suspension

WELL I BOUGHT THIS SUV USED FROM AMERICAS CARMART IN GADSDEN ALABAMA.THEY HAVE A 100 PLUS LOTS AND ADVERTISE GOOD USED QUALTIY CARS..WHEN I BOUGHT THE SUV I WANTED TO TAKE IT TO THE CHEVY DEALER BUT WAS TOLD THEIR ON SITE CERTIFIED MECHANIC CHECKED IT ALL OUT AND WITH THE SERVICE AGREEMENT THOUGHT I WAS OK....HAD IT TWO DAYS AND…

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WELL I BOUGHT THIS SUV USED FROM AMERICAS CARMART IN GADSDEN ALABAMA.THEY HAVE A 100 PLUS LOTS AND ADVERTISE GOOD USED QUALTIY CARS..WHEN I BOUGHT THE SUV I WANTED TO TAKE IT TO THE CHEVY DEALER BUT WAS TOLD THEIR ON SITE CERTIFIED MECHANIC CHECKED IT ALL OUT AND WITH THE SERVICE AGREEMENT THOUGHT I WAS OK....HAD IT TWO DAYS AND THE TRANSMISSION WENT OUT..THE SUSPENSION WAS ALSO AN ISSUE THEN 12/21/2014 ..GOING PAST 50 IT SHOOK LIKE CRAZY....AND THEN THE TRANSMISSION WAS SLIPPING AGAINI PURCHASED A SERVICE AGREEMENT FOR $595.00..IT COVERS WHAT MY PROBLEMS ARE...BUT THE CONTRACT SAYS THEY CAN USE NON MANUFACTER PARTS WHICH IS FINE...WHEN I BROUGHT IT TO THEM WITH THE TRANSMISSION..THEY PUT A JUNKYARD SALVAGE TRANSMISSION WITH 100.000 MILES ON IT...WHEN I CALLED THEM IN DECEMBER ABOUT THE SHAKING AND SUSPENSION AND THE TRANSMISSION...THEY SAID BRING IT IN...I ASKED THEM WHERE THEY WERE GOING TO TAKE IT..THEY REFUSED TO TELL ME...AND I TOLD THEM I DIDN'T WANT A JUNKYARD SUSPENSION OR TRANSMISSION AS PER CONTRACT WAS NOT SUPPOSE TO HAPPEN..I ALSO ASKED FOR A CERTIFIED MECHANIC TO DO THE WORK...THEY SAID THEY WOULD SEE WHAT THEY COULD DO.I DO A LOT OF DRIVING IN TENNESSEE..ALOT OF MOUNTAIN DRIVING AND I WAS NOT GOING TO HAVE THE FRONT END {BALL JOINTS,ETC GO OUT THERE..NOT REAL SAFE..THEY CAME AND GOT THE CAR...I THOUGHT THEY WERE GOING TO FIX IT AS AGREED...THAT WAS ON THE 8TH OF JAN..NOW THEY SAY THEY ARE GOING TO SUE ME FOR THE REMAINING BALANCE....I JUST WANT TO CALL ATTENTION TO THIS SUV AS IT IS NOT SAFE..AND ITS MY OPINION THEY DO THIS A LOT TO OTHER PEOPLE...I WANTED TO DRAW THIS TO YOUR ATTENTION AS I WOULD FEEL BAD IF I HEARD OF SOMEONE GETTING SERIOUSLY HURT..DUE TO THEIR INABILITY TO SELL QUALITY USED CARS AS THEY ADVERTISE...AND BELIEVE THEIR PRACTICES ON REPAIRING THESE CARS WITH A SERVICE AGREEMENT GETS CHECKED INTO..I FILED A COMPLAIT W/THE FTC AND AGOFFICE. *TR

NHTSA ODI #10671689

105,000 miles · Sep 26, 2014
Power TrainSuspension

THREE TIMES SINCE PURCHASING THIS VEHICLE IN JANUARY 2012, I HAVE HAD TO REPLACE THE RIGHT FRONT WHEEL HUB ASSEMBLY DUE TO BEARING FAILURE. RECENTLY THE TRANSMISSION, WHICH HAS NOT EXHIBITED A LEAK, WAS VERY LOW ON FLUID, (3 QUARTS) AND THE FLUID WAS BURNED. THE TRANSMISSION NOW SLIPS AND IS CHANGING ERRATICALLY. THE VEHICLE WA…

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THREE TIMES SINCE PURCHASING THIS VEHICLE IN JANUARY 2012, I HAVE HAD TO REPLACE THE RIGHT FRONT WHEEL HUB ASSEMBLY DUE TO BEARING FAILURE. RECENTLY THE TRANSMISSION, WHICH HAS NOT EXHIBITED A LEAK, WAS VERY LOW ON FLUID, (3 QUARTS) AND THE FLUID WAS BURNED. THE TRANSMISSION NOW SLIPS AND IS CHANGING ERRATICALLY. THE VEHICLE WAS REGULARLY SERVICED AT BUFF WHELAN CHEVROLET IN STERLING HEIGHTS, MI. *TR

NHTSA ODI #10639419

125,000 miles · Feb 17, 2011
Electrical SystemEngine And Engine CoolingExterior Lighting

INSTRUMENT CLUSTER FAILURE ON 2004 CHEVROLET TRAILBLAZER. OIL PRESSURE AND AMPS GAUGE MALFUNCTION. MECHANIC QUOTED PRICE $650 TO REPLACE CLUSTER. EMISSIONS FAILURE PAID DEALER APPROXIMATELY $375 TO REPLACE EMISSIONS PUMP. AIR CONDITIONING MODE MOTOR ACTUATOR OUT; BLOWER DOESN'T OPERATE ON HIGH SETTING. DEALER QUOTED PRICE $750 T…

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INSTRUMENT CLUSTER FAILURE ON 2004 CHEVROLET TRAILBLAZER. OIL PRESSURE AND AMPS GAUGE MALFUNCTION. MECHANIC QUOTED PRICE $650 TO REPLACE CLUSTER. EMISSIONS FAILURE PAID DEALER APPROXIMATELY $375 TO REPLACE EMISSIONS PUMP. AIR CONDITIONING MODE MOTOR ACTUATOR OUT; BLOWER DOESN'T OPERATE ON HIGH SETTING. DEALER QUOTED PRICE $750 TO FIX AIR CONDITIONER. SPORADIC ELECTRICAL ISSUES-SERVICE ENGINE SOON LIGHT ON-FIRST TIME CODE READ FAULTY THERMOSTAT COOLING SENSOR, NEXT IT READ FAULTY AIR MASS SENSOR, ANOTHER TIME IT READ FAULTY EMISSIONS SENSOR. MECHANIC QUOTED PRICE $40 PER HOUR PLUS PARTS TO ISOLATE PROBLEM. A PERSON COULD GO BROKE BEFORE FIXING POSSIBLE PROBLEMS, CONSIDERING NO ACCIDENT OCCURRED DUE TO ALL THESE POSSIBILITIES. FRONT SUSPENSION PROBLEMS, HARD TO ISOLATE. PAID MECHANIC $135 TO REPLACE RIGHT SIDE INNER TIE ROD END. DID NOT FIX PROBLEM. PROBLEM OCCURS WHEN RETURNING STEERING WHEEL FROM A RIGHT TURN, FRONT RIGHT SIDE MAKES A SINGLE "POP" SOUND. HAD TO REPLACE "BURNT" HEADLIGHT PIGTAILS ON FRONT, AND PARK LIGHT PIGTAIL ON RIGHT REAR. PROPERTY DAMAGE IS CONSIDERED DAMAGE TO VEHICLE DUE TO THE COMPLAINTS LISTED. *TR

NHTSA ODI #10383037

120,000 miles · May 22, 2009
Suspension

SWAY BAR LINKS (ALSO CALLED STABILIZER LINKS) REPLACED SEVERAL TIMES ON MY 2004 CHEVROLET TRAILBLAZER: I HAD ALL 4 REPLACED IN MAY 2007 BY A LOCAL REPAIR BUSINESS, THEN 10 MONTHS LATER THE REAR 2 WERE REPLACED BY AUTODEALERSHIP IN MARCH 2008, THEN YET AGAIN 8 MONTHS LATER I HAD THE RIGHT REAR ONE REPLACED BY SAME AUTODEALERSHIP…

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SWAY BAR LINKS (ALSO CALLED STABILIZER LINKS) REPLACED SEVERAL TIMES ON MY 2004 CHEVROLET TRAILBLAZER: I HAD ALL 4 REPLACED IN MAY 2007 BY A LOCAL REPAIR BUSINESS, THEN 10 MONTHS LATER THE REAR 2 WERE REPLACED BY AUTODEALERSHIP IN MARCH 2008, THEN YET AGAIN 8 MONTHS LATER I HAD THE RIGHT REAR ONE REPLACED BY SAME AUTODEALERSHIP (IN ALL CASES PARTS WERE ONLY GOOD FOR 12,000 MILES AND I HAD TRAVELED OVER THE LIMIT). I ASKED THE AUTO DEALERSHIP IF THEY THEMSELVES HAVE SEEN A TREND IN REPLACING THESE PARTS THEY GAVE ME A GM# TO CALL - WHICH I DIDN'T. I FIGURED I WOULD START HERE FIRST. (I KNEW THERE WAS SOME KIND OF PROBLEM IN ALL THREE CASES WHEN I HEARD LOUD RATTLING NOISES COMING FROM REAR OF THE SUV - I ADDITIONALLY HAD ALL 3 REPAIR PLACES SHOW ME THE OLD SWAY BAR LINKS TO OBSERVE DAMAGE.) I DO HAVE HIGH MILEAGE ON MY TRAILBLAZER BUT REPLACING SWAY BAR LINKS 3 TIMES ON SAME VEHICLE SEEMS EXCESSIVE. *TR

NHTSA ODI #10269694

65,000 miles · Aug 28, 2007
Suspension

HAD BANGING NOISES UNDER THE CAR WHICH AT SOME POINT FELT AS IF MY SUSPENSION WAS BAD SINCE IT WAS NOT STABLE RIDING. THE SUV SEEMED AS IF IT WERE DARTING ACROSS THE ROADS AND LEFT US DRIVERS FEELING AS IF WE WERE ALWAYS ADJUSTING THE SUV TO KEEP IT IN THE LANE. TURNED OUT THAT ALL FOUR SWAY BAR LINKS WHERE BAD WHICH LEADS MY FA…

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HAD BANGING NOISES UNDER THE CAR WHICH AT SOME POINT FELT AS IF MY SUSPENSION WAS BAD SINCE IT WAS NOT STABLE RIDING. THE SUV SEEMED AS IF IT WERE DARTING ACROSS THE ROADS AND LEFT US DRIVERS FEELING AS IF WE WERE ALWAYS ADJUSTING THE SUV TO KEEP IT IN THE LANE. TURNED OUT THAT ALL FOUR SWAY BAR LINKS WHERE BAD WHICH LEADS MY FAMILY TO WONDER WHY WOULD ALL FOUR SWAY BAR LINKS TWO IN THE FRONT & TWO IN THE REAR GO BAD AT THE SAME TIME AND IN LESS THEN A YEAR OF HAVING THE SUV INSPECTED BY THE SAME DEALER WHOM FOUND THE SWAY BAR LINKS FRONT & REAR TO BE BAD. SEEMS TO ME THAT THESE PARTS ARE NOT OF QUALITY AND POORLY MADE AND MAKE THE AUTO VERY UNSTABLE WHEN THEY FAIL AND COULD CAUSE AN ACCIDENT IN DOING SO. WE ENDED UP REPLACING THE TWO FRONT SWAY BAR LINKS BUT, ARE HOLDING OFF ON THE REAR FOR RIGHT NOW. I FEEL THESE SWAY BAR LINKS SHOULD BE LOOKED INTO FOR A POSSIBLE RECALL. *JB

NHTSA ODI #10201041

62,000 miles · May 2, 2007
Suspension

TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT WHEN SHE STEERED THE VEHICLE SHE HEARD A GRINDING NOISE AND SOMETIMES FELT VIBRATION. THE FAILURE OCCURRED WHEN TURNING OR JUST SWITCHING LANES. SPEED WAS NOT A FACTOR. THE NOISES BEGAN THE FIRST WEEK OF APRIL 2007, AND BECAME MORE DISTINCT, CONSIS…

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TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT WHEN SHE STEERED THE VEHICLE SHE HEARD A GRINDING NOISE AND SOMETIMES FELT VIBRATION. THE FAILURE OCCURRED WHEN TURNING OR JUST SWITCHING LANES. SPEED WAS NOT A FACTOR. THE NOISES BEGAN THE FIRST WEEK OF APRIL 2007, AND BECAME MORE DISTINCT, CONSISTENT, AND LOUD. ALSO, THE CONTACT ALSO STATED THAT THEREWAS NOW A PERIODIC RATTLING AND CLUNKING SOUND COMING FROM UNDER THE HOOD OF THE VEHICLE. THE CURRENT MILEAGE IS 62,400, AND FAILURE MILEAGE WAS 62,000. THE CONTACT HAD THE NAME OF THE DEALER WHERE THE VEHICLE WAS PURCHASED, BUT COULD NOT PROVIDE THE ADDRESS OR TELEPHONE NUMBER. *AK

NHTSA ODI #10189499

18,000 miles · Jan 10, 2007
Suspension

SNAPPING AND POPPING FROM FRONT AND REAR SUSPENSION. TOOK TO DEALER AND THEY REPLACED THE STABALIZER LINKS. THIS SEEMD TO TAKE CARE OF THE PROBLEM FOR A WHILE. NOW THE NOISE IS BACK AND AT TIMES IS QUITE LOUD. VEHICLE HAS 21,000 MILES. *JB

NHTSA ODI #10178284

Official recalls

2

05V198000 · Exterior Lighting:turn Signal

May 5, 2005

ON CERTAIN TRUCKS AND SPORT UTILITY VEHICLES, THE DRIVER WISHING TO SIGNAL A TURN BY MOVING THE DIRECTIONAL SIGNAL LEVER, (UP OR DOWN) MAY CAUSE THE FRONT MARKER/TURN LIGHTS AND REAR TURN LIGHTS TO FLASH IN A MANNER SIMILAR TO HAZARD WARNING, RATHER THAN FLASHING ON THE DESIRED SIDE ONLY.

Consequence & remedy

Consequence: THE DRIVER MAY NOT BE ABLE TO CLEARLY SIGNAL THEIR INTENTIONS TO TURN, CHANGE TRAVEL LANES, OR POTENTIALLY WARN OTHERS OF AN IMPAIRED VEHICLE OPERATING CONDITION INCREASING THE RISK OF A CRASH.

Remedy: DEALERS WILL REPLACE THE SUSPECT FLASHER MODULES WITH A NEW FLASHER MODULE DESIGNED WITH SEALED RELAYS AND MORE DURABLE CONTACT MATERIAL INSIDE OF THE RELAYS FREE OF CHARGE. THE RECALL BEGAN ON AUGUST 4, 2005. ISUZU BEGAN MAILING OWNER LETTERS ON AUGUST 4, 2005. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, ISUZU AT 1-800-255-6727, BUICK AT 1-866-608-8080, AND OLDSMOBILE AT 1-800-630-6537.

04V527000 · Exterior Lighting:brake Lights

Nov 1, 2004

ON CERTAIN SPORT UTILITY VEHICLES, VIBRATION AND HEAT MAY CAUSE THE TAIL LAMP/STOP LAMP BULB TO LOOSEN IN ITS SOCKET. IF THIS OCCURS, THE BULB MAY FLICKER AND EVENTUALLY BECOME INOPERATIVE.

Consequence & remedy

Consequence: AN INOPERATIVE BRAKE LAMP WILL NOT CONVEY THE DRIVER'S INTENTION OF STOPPING TO DRIVERS IN FOLLOWING VEHICLES, AND AN INOPERATIVE REAR TURN SIGNAL LAMP WILL NOT CONVEY THE DRIVER'S INTENTION TO TURN TO DRIVERS IN FOLLOWING VEHICLES. BOTH OF THESE FAILURES CAN INCREASE THE RISK OF A CRASH.

Remedy: DEALERS WILL INSPECT THE TAIL LAMP/STOP LAMP ASSEMBLIES, AND IF NECESSARY, REPLACE THEM. THE RECALL BEGAN ON NOVEMBER 22, 2004. OWNERS SHOULD CONTACT CHEVROLET AT 1-800-630-2438, OLDSMOBILE AT 1-800-630-6537, BUICK AT 1-866-608-8080, 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

4

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.

EA07009 · Fuel Pump Module Leaks Gasoline

Opened Jul 10, 2007 · Closed Aug 28, 2008

Status: closed (inferred from source dates) · Fuel System, Gasoline:delivery:fuel Pump

DURING THE COURSE OF THIS EA INVESTIGATION, ODI OBSERVED THAT THE MAJORITY OF THE COMPLAINTS (88%) AND WARRANTY CLAIMS (94%) WERE REPORTED FOR VEHICLES THAT ARE REGISTERED FOR USE IN THE SALT BELT REGION OF THE US.THIS AREA INCLUDES 20 STATES IN THE NORTHEAST, MID ATLANTIC AND THE MIDWEST REGIONS AND THE DISTRICT OF COLUMBIA.CONSUMERS IN THE SALT BELT REGION REPORTED TO ODI THAT THEY COULD SMELL FUEL VAPORS IN THEIR VEHICLES WHILE DRIVING.UPON FURTHER EXAMINATION OF THEIR VEHICLES, THEY DISCOVERED THAT FUEL VAPORS WERE COMING OUT OF THE TOP OF THE FUEL TANK. THIS CONDITION IS CAUSED BY CORROSION OF THE RETURN AND SENDER LINES OF THE FUEL PUMP MODULE.WATER AND ROAD SALT COLLECT ON TOP OF THE FUEL PUMP LEADING TO SMALL PINHOLES APPEARING ON THE FUEL LINES.FUEL MAY LEAK AND COLLECT ON TOP OF THE MODULE AND/OR SPILL ONTO THE GROUND.THE DATA EVALUATED UNDER THIS INVESTIGATION REFLECT A RELATIVELY LOW FREQUENCY OF OCCURRENCE THAT LARGELY ARISES IN SALT BELT STATES.GM HAS EXTENDED THE WARRANTY ON THE SUBJECT COMPONENT TO TEN YEARS OR 120,000 MILES.FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED AT THIS TIME; ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT NO SAFETY-RELATED DEFECT EXISTS.THE AGENCY RESERVES THE RIGHT TO TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.FOR ADDITIONAL INFORMATION SELECT DOCUMENT SEARCH.

EA04021 · Brake Lamp Failure

Opened Aug 3, 2004 · Closed Nov 4, 2004

Status: closed (inferred from source dates) · Exterior Lighting:brake Lights

GM STATES THAT SOME BRAKE/TAIL LAMP BULBS CAN PREMATURELY BECOME INOPERATIVE DUE TO MALFUNCTIONING BRAKE/TAIL LAMP SOCKETS.ON MARCH 2, 2004, GM INITIATED A 6-YEAR/72,000 MILE SPECIAL POLICY FOR 989,487 SUBJECT VEHICLES TO INSPECT AND REPLACE THE REAR BRAKE/TAIL LAMP BULB SOCKET ASSEMBLIES.ON APRIL 4, 2004, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION (PE04-032) BASED ON CONSUMER COMPLAINTS ALLEGING BRAKE LIGHTS NOT OPERATING WHEN THE BRAKE PEDAL IS DEPRESSED.ON AUGUST 3, 2004 ODI UPGRADED PE04-032 TO AN ENGINEERING ANALYSIS (EA04-021).BY LETTER DATED OCTOBER 27, 2004 GM NOTIFIED NHTSA THAT IT WILL CONDUCT A SAFETY RECALL (NHTSA # 04V527) COVERING SUBJECT VEHICLES THAT WERE NOT ALREADY REPAIRED UNDER GM'S SPECIAL POLICY.MY 2004 SUBJECT VEHICLES BUILT AFTER AUGUST 8, 2003 CONTAIN IMPROVED BRAKE LAMP ASSEMBLIES AND ARE NOT INCLUDED IN THE RECALL.GM DEALERS WILL INSTALL THE IMPROVED BRAKE LAMP ASSEMBLY ON SUBJECT VEHICLES BUILT ON AUGUST 8, 2003 AND EARLIER.THE ACTION TAKEN BY GM IS SUFFICIENT TO RESOLVE THE ISSUES RAISED BY THIS INVESTIGATION.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.

PE04032 · Brake Lamp Failure

Opened Apr 6, 2004 · Closed Aug 3, 2004

Status: closed (inferred from source dates) · Exterior Lighting:brake Lights

THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED THIS INVESTIGATION ON MODEL YEAR (MY) 2002-04 CHEVROLET TRAILBLAZER VEHICLES.GM REPORTS THAT OTHER VEHICLES SHARING THIS PLATFORM AND BRAKE LAMP DESIGN ARE THE MY 2002-2004 CHEVROLET TRAILBLAZER EXT; GMC ENVOY, XL, XUV; OLDSMOBILE BRAVADA AND 2004 BUICK RAINIER.COMPLAINTS ALLEGE THAT THE REAR BRAKE LAMP DOES NOT OPERATE WHEN THE BRAKE PEDAL IS DEPRESSED.THERE IS NO INDICATION TO THE DRIVER FROM INSIDE THE VEHICLE THAT ONE OR MORE BRAKE LAMPS BULBS ARE NOT FUNCTIONING.GM FOUND THAT HEAT FROM THE BULB COULD DEFORM THE LAMP SOCKET, PRODUCE ELECTRICAL ARCING AND AN INOPERATIVE BULB.TO CORRECT THE CONDITION, GM CHANGED THE BULB TO A BULB THAT TRANSMITS LESS HEAT TO THE SOCKET AND CHANGED THE SOCKET TO A THERMOPLASTIC POLYMER TO IMPROVE THERMAL STABILITY.THESE CHANGES WERE IMPLEMENTED INTO PRODUCTION VEHICLES ON OCTOBER 1, 2003.GM IMPLEMENTED A SPECIAL POLICY BY NOTIFYING CONSUMERS THAT IF THEY SHOULD EXPERIENCE A BRAKE LAMP FAILURE TO GO TO THEIR GM DEALERSHIP TO HAVE THE CIRCUIT BOARD CONTAINING THE BRAKE LAMP REPLACED ALONG WITH NEW BULBS.THIS POLICY IS GOOD FOR THE FIRST 6 YEARS OR 72,000 MILES OF THE LIFE OF THE VEHICLE.ODI WILL UPGRADE THIS INVESTIGATION TO EA 04-021 AND INCLUDE THE ABOVE MENTIONED VEHICLES.