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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.

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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

Power Train complaints

62 reports
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48,420 miles · Jun 30, 2009
Electrical SystemPower Train

THE SPEEDOMETER QUIT WORKING ON MY 2004 CHEVY TRAILBLAZER ABOUT 9 MONTHS AGO. TACH ALSO HAS A TENDENCY TO STICK. TRANSMISSION STARTED GOING OUT 2 WEEKS AFTER PURCHASE (USED IN JULY 2008 WITH 42,000 MILES). TRANSMISSION WENT COMPLETELY OUT IN NOVEMBER 2008. *TR

NHTSA ODI #10275397

101,576 miles · Jun 4, 2009
Power TrainService Brakes, HydraulicFire

TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE TRANSMISSION SUN GEAR WAS FAULTY. AN ELECTRICAL COMPONENT WAS BURNING INSIDE THE VEHICLE, ALONG WITH ABS FAILURE. THE VEHICLE WAS TAKEN BACK TO THE DEALER AND THEY STATED THAT THERE WAS NO GUARANTEE THAT THE VEHICLE WAS WORKING PROPERLY. THE OIL NE…

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TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE TRANSMISSION SUN GEAR WAS FAULTY. AN ELECTRICAL COMPONENT WAS BURNING INSIDE THE VEHICLE, ALONG WITH ABS FAILURE. THE VEHICLE WAS TAKEN BACK TO THE DEALER AND THEY STATED THAT THERE WAS NO GUARANTEE THAT THE VEHICLE WAS WORKING PROPERLY. THE OIL NEEDED TO BE CHANGED, SO THE CONTACT CHANGED IT HIMSELF. THE FAILURES OCCURRED RIGHT AFTER THE VEHICLE WAS PURCHASED FROM THE DEALER. THE DEALER PERFORMED A 120 POINT INSPECTION, BUT THEY NEVER REPAIRED THE VEHICLE. THE FAILURE MILEAGE WAS 101,576.

NHTSA ODI #10272879

64,000 miles · Apr 16, 2009
Power Train

TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. WHILE DRIVING 25 MPH, THE CONTACT HEARD A RUBBING NOISE COMING FROM THE FRONT PASSENGER SIDE OF THE VEHICLE. SHE THEN NOTICED A BURNING ODOR COMING FROM THE ENGINE. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP AND THEY DETERMINED THAT THE OIL CAP FOR THE FOUR-WHEEL DRIVE FAILE…

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TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. WHILE DRIVING 25 MPH, THE CONTACT HEARD A RUBBING NOISE COMING FROM THE FRONT PASSENGER SIDE OF THE VEHICLE. SHE THEN NOTICED A BURNING ODOR COMING FROM THE ENGINE. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP AND THEY DETERMINED THAT THE OIL CAP FOR THE FOUR-WHEEL DRIVE FAILED. THE CAP WAS REPLACED AT THE COST OF $5 AND THE CONTACT WAS ADVISED TO NEVER PLACE THE VEHICLE INTO FOUR-WHEEL DRIVE. ONE YEAR LATER, WHILE DRIVING AT AN UNKNOWN SPEED, THE CONTACT HEARD A HUMMING NOISE COMING FROM THE FRONT OF THE VEHICLE. SHE WAS ABLE TO SAFELY DRIVE THE VEHICLE TO HER DESTINATION. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP AND THE TECHNICIAN DETERMINED THAT THE FRONT DIFFERENTIAL FAILED. THE REPAIR WOULD COST $2,000. THE VEHICLE HAS NOT YET BEEN REPAIRED. THE CONTACT CALLED THE MANUFACTURER AND WAS INFORMED THAT BECAUSE THE VEHICLE DID NOT RECEIVE REGULAR MAINTENANCE FROM A DEALER, NO COMPENSATION WOULD BE PROVIDED TOWARDS THE REPAIR. THE VIN WAS UNAVAILABLE. THE FAILURE MILEAGE WAS 64,000 AND CURRENT MILEAGE WAS 81,000.

NHTSA ODI #10265568

56,000 miles · Feb 10, 2009
Electrical SystemPower Train

I OWN A 2004 CHEVY TRAILBLAZER WITH 56K MILEAGE. IN DECEMBER 2008, THE SPEEDOMETER STOPPED WORKING. I WOULD BE AT STOP, AND THE NEEDLE SHOWED 80 MPH. I BROUGHT THE CAR TO THE DEALERSHIP RIGHT AWAY AND THEY TOLD ME THAT THE CLUSTER NEEDS TO BE REPLACED - BUT THEY NEEDED TO ORDER THE REPLACEMENT PART. I FINALLY GOT IT FIXED A WEEK…

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I OWN A 2004 CHEVY TRAILBLAZER WITH 56K MILEAGE. IN DECEMBER 2008, THE SPEEDOMETER STOPPED WORKING. I WOULD BE AT STOP, AND THE NEEDLE SHOWED 80 MPH. I BROUGHT THE CAR TO THE DEALERSHIP RIGHT AWAY AND THEY TOLD ME THAT THE CLUSTER NEEDS TO BE REPLACED - BUT THEY NEEDED TO ORDER THE REPLACEMENT PART. I FINALLY GOT IT FIXED A WEEK LATER AND IT COST ME APPROXIMATELY $525. NOW, FOR THE PAST TWO WEEKS, THE ENGINE HAD SUDDENLY SHUT OFF IN THE MIDDLE OF DRIVING. THE "REDUCED POWER" & "CHECK ENGINE" LIGHTS CAME ON. BOTH TIMES, IT STARTED BACK UP AFTER I PARKED IT, TURNED OFF THE IGNITION, AND RE-STARTED. BUT AFTER THE SECOND TIME, I BROUGHT IT IN TO THE DEALERSHIP. I HAD TO HAVE THE ACCELERATOR PEDAL REPLACED. COST ME APPROX $360. THESE TWO ISSUES ARE VERY CONCERNING WITH ME BECAUSE IF I WERE DRIVING AT HIGHER SPEED (65MPH) IN THE MIDDLE OF THE HIGHWAY (INSTEAD OF 30MPH AROUND TOWN), I COULD HAVE DIED FROM CONTACTS WITH OTHER VEHICLES BECAUSE MY VEHICLES STOPPED FUNCTIONING! *TR

NHTSA ODI #10258189

102,000 miles · Jan 5, 2009
Power Train

TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT TOOK THE VEHICLE TO MIDAS FOR PREVENTIVE MAINTENANCE. THE TRANSMISSION WAS FLUSHED AND THE OIL WAS REPLACED WITH A LIFE X-TEND OIL, WHICH CAUSED THE TRANSMISSION TO SLIP AND MAKE A LOUD NOISE WHEN SHIFITNG INTO REVERSE OR DRIVE. THE DEALER STATED THAT THE BEARING F…

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TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT TOOK THE VEHICLE TO MIDAS FOR PREVENTIVE MAINTENANCE. THE TRANSMISSION WAS FLUSHED AND THE OIL WAS REPLACED WITH A LIFE X-TEND OIL, WHICH CAUSED THE TRANSMISSION TO SLIP AND MAKE A LOUD NOISE WHEN SHIFITNG INTO REVERSE OR DRIVE. THE DEALER STATED THAT THE BEARING FAILED. THE CONTACT FEELS THAT THE OIL THAT WAS PLACED IN THE TRANSMISSION REVEALED THAT THE TRANSMISSION HAD PREVIOUS FAILURES. A REPORT WAS FILED WITH THE MANUFACTURER. THE MANUFACTURER STATED THAT THEY WILL INVESTIGATE THE FAILURE. THE X-TEND OIL MANUFACTURER STATED THAT THEY WOULD PAY FOR THE REPAIR IF IT IS PROVEN THAT THE OIL WAS THE CAUSE FOR THE TRANSMISSION FAILURE. THE CURRENT AND FAILURE MILEAGES WERE 102,000.

NHTSA ODI #10253844

45,000 miles · Jun 3, 2008
Power Train

BOTH ISSUES OCCUR DAILY: APPARENT TRANSMISSION PROBLEMS...VEHICLE CANNOT SEEM TO "GET IN GEAR" WHEN CRUISING ANYWHERE FROM 40 - 70 MPH. IT BOUNCES BACK AND FORTH BETWEEN GEARS - NOT NORMAL DRIVING CONDITIONS. MULTIPLE TRIPS TO 2 DIFFERENT GM DEALERS HAS EXPOSED NO PROBLEMS, AS THEY "CANNOT REPLICATE THE PROBLEM". THEY MU…

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BOTH ISSUES OCCUR DAILY: APPARENT TRANSMISSION PROBLEMS...VEHICLE CANNOT SEEM TO "GET IN GEAR" WHEN CRUISING ANYWHERE FROM 40 - 70 MPH. IT BOUNCES BACK AND FORTH BETWEEN GEARS - NOT NORMAL DRIVING CONDITIONS. MULTIPLE TRIPS TO 2 DIFFERENT GM DEALERS HAS EXPOSED NO PROBLEMS, AS THEY "CANNOT REPLICATE THE PROBLEM". THEY MUST NOT HAVE DRIVEN THE CAR AT THOSE SPEEDS AS IT DOES IT RELIGIOUSLY. LIKE MANY OTHER COMPLAINTS LISTED HERE, AND THROUGHOUT SEARCHES DONE FOR 2004 TRAILBLAZER ISSUES, MY TACHOMETER & SPEEDOMETER ARE FAULTY. THEY DO NOT WORK PROPERLY... AT ANY TIME MAY SHOW 8000 RPMS OR 100+ MPH WHEN SITTING AT A STOPLIGHT, OR RESTING AT 0 RPMS AND 0 MPH WHEN CRUISING ON A HIGHWAY. THIS IS DANGEROUS, AND GM NEEDS TO FIX THIS PROBLEM ASAP FOR MODELS EXPERIENCING THIS ISSUE. I'M VERY DISAPPOINTED THERE HAS NOT BEEN A RECALL - MY FAMILY HAS ALWAYS BEEN OWNERS OF GM VEHICLES...BUT WILL BE NO MORE. *TR

NHTSA ODI #10229747

46,000 miles · May 19, 2008
Power Train

WE TOOK OUR CAR ON WEDNESDAY 5/14 TO SUPERIOR CHEVROLET IN CINCINNATI OH BECAUSE ON TUESDAY EVENING THE TRANSMISSION FELT LIKE IT WAS STARTING TO SLIP AND NOT DRIVING CORRECTLY. THE DEALERSHIP CONTACTED US ON THURSDAY 5/15 TO SAY THEY WERE WAITING FOR THE WARRANTY REPRESENTATIVE TO COME OUT AND GIVE APPROVAL BEFORE IT COULD BE R…

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WE TOOK OUR CAR ON WEDNESDAY 5/14 TO SUPERIOR CHEVROLET IN CINCINNATI OH BECAUSE ON TUESDAY EVENING THE TRANSMISSION FELT LIKE IT WAS STARTING TO SLIP AND NOT DRIVING CORRECTLY. THE DEALERSHIP CONTACTED US ON THURSDAY 5/15 TO SAY THEY WERE WAITING FOR THE WARRANTY REPRESENTATIVE TO COME OUT AND GIVE APPROVAL BEFORE IT COULD BE REPAIRED. ON FRIDAY AFTERNOON, WE WERE ADVISED THE CLAIM WAS DENIED BECAUSE THERE WAS WATER IN THE TRANSMISSION. THE SERVICE MANAGER SAID IT WAS DUE TO A GM DEFECT WITH THE DIP STICK - THE WAY IT WAS POSITIONED ALLOWED WATER TO GET INTO THE TRANSMISSION AND RUST, SO THE WARRANTY WAS NULL AND VOID. THE SERVICE MANAGER SAID HE SPOKE W/HIS GM REP AND THEY WOULD AGREE TO "DO US A FAVOR" AND SPLIT THE COST OF THE NEW TRANSMISSION - $1200 STILL OUT OF POCKET FOR US. WHEN WE PUSHED BACK AND ASKED WHY WE WOULD HAVE TO PAY ANYTHING, THEY REFUSED TO ANSWER - JUST TOLD US TO FIGHT IT WITH OUR WARRANTY COMPANY. I'VE BEEN RESEARCHING ONLINE TO FIGURE OUT HOW TO FIGHT THIS AND PREVENT OTHER PEOPLE FROM SUFFERING AS WELL. IF IT'S A GM DEFECT IN THE WAY THE DIP STICK IS POSITIONED, THE CONSUMER SHOULD NOT HAVE TO PAY FOR THE DAMAGE CAUSED BY THE DEFECT. ANY HELP YOU CAN PROVIDE WOULD BE GREATLY APPRECIATED. THE CAR IS A 2004 CHEVY TRAILBLAZER WITH A FULL EXTENDED WARRANTY, BUT IT DOES SPECIFICALLY STATE IT'S VOID IF THE PROBLEM IS DUE TO WATER. AFTER READING ON SEVERAL CHAT ROOMS, THERE SEEMS TO BE MANY PEOPLE WITH THIS SAME ISSUE. *TR

NHTSA ODI #10228159

45,000 miles · Jan 6, 2008
Power TrainCrash

THE FAILURE INVOLVES THE ELECTRO-MECHANICAL DEVICE THAT SHIFTS THE CAR INTO FOUR-WHEEL DRIVE. THE FOUR-WHEEL IS ENGAGED BY SELECTING 4WD WITH A DASHBOARD SELECTOR SWITCH. THE SWITCH WILL SHOW A LIGHTED INDICATOR MOVING FROM 2WD TO THE 4WD. THIS INDICATION IS FAULTY. WHILE DRIVING TOWARDS A SNOW COVERED MOUNTAIN ROAD WITH SEVERAL…

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THE FAILURE INVOLVES THE ELECTRO-MECHANICAL DEVICE THAT SHIFTS THE CAR INTO FOUR-WHEEL DRIVE. THE FOUR-WHEEL IS ENGAGED BY SELECTING 4WD WITH A DASHBOARD SELECTOR SWITCH. THE SWITCH WILL SHOW A LIGHTED INDICATOR MOVING FROM 2WD TO THE 4WD. THIS INDICATION IS FAULTY. WHILE DRIVING TOWARDS A SNOW COVERED MOUNTAIN ROAD WITH SEVERAL SHARP TURNS GOING UP THE MOUNTAIN THE VEHICLES SELECTOR SWITCH WAS MOVED TO THE 4WD POSITION AND THE INDICATOR LIGHT SHOWN IT WAS ENGAGE IN THE 4WD MODE. HOWEVER THE INDICATION WAS FAULTY AND THE VEHICLE WAS ACTUALLY ONLY IN 2WD. THE SELECTOR SWITCH ENGAGES AN ACTUATOR THAT CAUSES A FORK TO MOVE THE GEARS IN THE FRONT TRANSFER CASE INTO OR OUT OF 4WD. THE RESULT OF THE FALSE INDICATION OF THE VEHICLE BEING IN 4WD WHEN IT WAS ACTUALLY IN 2WD CAUSE THE REAR OF THE VEHICLE TO BREAK TRACTION AND THE ENTIRE VEHICLE TO START INTO A SPIN WHICH RESULTED IN THE VEHICLE LEAVING THE ROAD AND DAMAGE TO THE FRONT END OF THE VEHICLE. THE MAIN PROBLEM IS THAT THE VEHICLE GAVE A FALSE INDICATION OF BEING IN 4WD WHEN IT WAS ACTUALLY IN 2WD. *TR

NHTSA ODI #10213976

48,000 miles · Jun 26, 2007
EquipmentPower Train

IN APRIL 2007, THE '04 TRAILBLAZER'S TRANSMISSION FAILED. AT THE TIME THE VEHICLE HAD LESS THAN 50,000 MILES. I DRIVE THE CAR VERY WELL - MOSTLY HIGHWAY MILES AS I COMMUTE FOR WORK - AND THE VEHICLE HAD NEVER BEEN USED TO TOW. THE TRANSMISSION WAS REPAIRED AT A CHEVROLET DEALER, AND LESS THAN 2 MONTHS LATER, THE TRANSMISSION…

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IN APRIL 2007, THE '04 TRAILBLAZER'S TRANSMISSION FAILED. AT THE TIME THE VEHICLE HAD LESS THAN 50,000 MILES. I DRIVE THE CAR VERY WELL - MOSTLY HIGHWAY MILES AS I COMMUTE FOR WORK - AND THE VEHICLE HAD NEVER BEEN USED TO TOW. THE TRANSMISSION WAS REPAIRED AT A CHEVROLET DEALER, AND LESS THAN 2 MONTHS LATER, THE TRANSMISSION FAILED AGAIN. I AM VERY UNSATISFIED WITH THE QUALITY OF THIS VEHICLE.*AK

NHTSA ODI #10194259

25,605 miles · Jun 15, 2007
Power Train

2004 CHEVROLET TRAILBLAZER 2 WHEEL DRIVE (2WD) TRANSMISSION FAILURE. TRANSMISSION FAILED WHILE UNDER NORMAL HIGHWAY OPERATING CONDITIONS, SPEED APPROXIMATELY 55 MPH, TWO LANE HIGHWAY, SURFACE CONDITIONS DRY, MILEAGE 25605. FAILURE PROCEEDED BY STRANGE NOISE, THEN COMPLETE DISENGAGEMENT / LOSS OF POWER. SERVICE ENGINE CHECK L…

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2004 CHEVROLET TRAILBLAZER 2 WHEEL DRIVE (2WD) TRANSMISSION FAILURE. TRANSMISSION FAILED WHILE UNDER NORMAL HIGHWAY OPERATING CONDITIONS, SPEED APPROXIMATELY 55 MPH, TWO LANE HIGHWAY, SURFACE CONDITIONS DRY, MILEAGE 25605. FAILURE PROCEEDED BY STRANGE NOISE, THEN COMPLETE DISENGAGEMENT / LOSS OF POWER. SERVICE ENGINE CHECK LIGHT ILLUMINATED; LATER DIAGNOSED BY GMC DEALORSHIP AS AN OPEN / LOOSE GAS CAP AS TH E CAUSE. THE VEHICLE WAS MANUEVERED / COASTED WITHOUT POWERTRAIN ASSISTANCE TO PARKING LOT ADJACENT TO THE HIGHWAY WITHOUT INJURY / INCIDENT. VEHICLE TOWED TO DEALORSHI ON . 6/15/07) INFORMED BY GM REPRESENTATIVE THAT COMPONENT REPLACEMENT / REPAIR NEEDED, SPECIFICS UNKNOWN, COST $2400 OF WHICH GM WOULD PAY 50%; MY COST $1200. *AK

NHTSA ODI #10193465

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.