NHTSA owner reports · September 18, 2026 snapshot.
Electrical System complaints
627 reportsClear category filterMileage unknown · Aug 2, 2007
Electrical System
TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE HEADLIGHTS AND INTERIOR LIGHTS WOULD DIM INTERMITTENTLY. AT TIMES, THE HEADLIGHTS ARE SO DIM THAT HE CAN HARDLY SEE THE ROAD. THE DEALER WAS ABLE TO DUPLICATE THE FAILURE, HOWEVER, THEY WERE UNABLE TO PROVIDE A REMEDY. THE CONTACT WAS ADVISED NOT T…
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TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE HEADLIGHTS AND INTERIOR LIGHTS WOULD DIM INTERMITTENTLY. AT TIMES, THE HEADLIGHTS ARE SO DIM THAT HE CAN HARDLY SEE THE ROAD. THE DEALER WAS ABLE TO DUPLICATE THE FAILURE, HOWEVER, THEY WERE UNABLE TO PROVIDE A REMEDY. THE CONTACT WAS ADVISED NOT TO DRIVE THE VEHICLE AT NIGHT. THE CURRENT MILEAGE WAS 29,000 AND THE FAILURE MILEAGE WAS UNKNOWN. UPDATED 02-01-08. *KB
NHTSA ODI #10198332
Mileage unknown · Jul 25, 2007
Electrical SystemVisibility
I HAVE OWNED THIS VEHICLE FOR 2 1/2 YEARS. THE FIRST PROBLEM WAS NOTICEABLE ONLY AT NIGHT WHEN THE WINDSHIELD GLARE WAS SO BAD ON THE FREEWAY THAT I COULD NOT SEE VERY WELL. WE HAD THE WINDSHIELD REPLACED. THE SECOND PROBLEM HAS BEEN ON-GOING FOR THE PAST SIX TO EIGHT MONTHS. THE SPEEDOMETER SOMETIMES WORKS, BUT IS USUALLY N…
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I HAVE OWNED THIS VEHICLE FOR 2 1/2 YEARS. THE FIRST PROBLEM WAS NOTICEABLE ONLY AT NIGHT WHEN THE WINDSHIELD GLARE WAS SO BAD ON THE FREEWAY THAT I COULD NOT SEE VERY WELL. WE HAD THE WINDSHIELD REPLACED. THE SECOND PROBLEM HAS BEEN ON-GOING FOR THE PAST SIX TO EIGHT MONTHS. THE SPEEDOMETER SOMETIMES WORKS, BUT IS USUALLY NOT VERY CORRECT, AND MOST OF THE TIME IT JUST PICKS A NUMBER AND SITS THERE FOR SEVERAL DAYS, WHETHER THE CAR IS RUNNING OR NOT. I USUALLY USE THE RPMS TO FIGURE OUT HOW FAST I AM GOING UNTIL MY MECHANIC CAN FIX IT FOR MORE THAN A WEEK AT A TIME. *TR
NHTSA ODI #10197464
40,000 miles · Jun 30, 2007
Electrical SystemFuel System, Other
DAILY FAILURE OF SEEDOMETER ON MY 2004 CHEVROLET TRAILBLAZER. THIS WAS IN ADDITION TO FAILURE OF THE FUEL GAUGE. THE SPEEDOMETER PROBLEM WAS INCONSISTENT AND MADE ME QUESTION THE ACTUAL SPEED AT EVERY MOMENT AND MADE ME MEASURE BASED ON OTHER TRAFFIC. IT IS A VERY DISTRACTING WAY TO DRIVE WITH ALL GAUGES MOVING AT TIMES AND THE…
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DAILY FAILURE OF SEEDOMETER ON MY 2004 CHEVROLET TRAILBLAZER. THIS WAS IN ADDITION TO FAILURE OF THE FUEL GAUGE. THE SPEEDOMETER PROBLEM WAS INCONSISTENT AND MADE ME QUESTION THE ACTUAL SPEED AT EVERY MOMENT AND MADE ME MEASURE BASED ON OTHER TRAFFIC. IT IS A VERY DISTRACTING WAY TO DRIVE WITH ALL GAUGES MOVING AT TIMES AND THEN RETURNING TO A FIXED SETTING. I HAD THE CLUSTERBOARD REPLACED BY THE DEALER WHO CLAIMED THIS WAS NOT A COMMON PROBLEM. INSTRUMENT PANELS ON 3 YEAR OLD CARS DO NOT FAIL UNLESS THERE IS A MANUFACTURING PROBLEM. PLEASE PREVENT ACCIDENTS IN THE FUTURE THIS IS NOT A SAFE WAY TO OPERATE A VEHICLE. *TR
NHTSA ODI #10195057
35,000 miles · Jun 13, 2007
Electrical System
TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. SHE STATED THAT THE SPEEDOMETER AND THE GAS GAUGE WORKS INTERMITTENTLY. WHEN MAKING A RIGHT TURN SHE HEARS A HUMMING NOISE. THE DEALER STATED THAT THEY WERE UNABLE TO DUPLICATE THE PROBLEMS HOWEVER; THEY SUGGESTED THAT THE INSTRUMENT PANEL BE REPLACED. THE DEALER HAS NOT MADE…
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TL*THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. SHE STATED THAT THE SPEEDOMETER AND THE GAS GAUGE WORKS INTERMITTENTLY. WHEN MAKING A RIGHT TURN SHE HEARS A HUMMING NOISE. THE DEALER STATED THAT THEY WERE UNABLE TO DUPLICATE THE PROBLEMS HOWEVER; THEY SUGGESTED THAT THE INSTRUMENT PANEL BE REPLACED. THE DEALER HAS NOT MADE THE REPLACEMENT. THE FAILURE MILEAGE WAS 35,000 AND THE CURRENT MILEAGE WAS 49,000.
NHTSA ODI #10193138
38,000 miles · Jun 11, 2007
Electrical System
INSTURMENT PANEL NOT WORKING PROPERLY. THE SPEEDOMOTER STARTED OUT SHOWING RANDOM SPEEDS AND NOWWA S PERMENANTLY STUCK AT 89 MPH NO MATTER IF THE CAWASS RUNNING OR NOT. THE RPM GAUGE ALSO DOID NOT MOVE. THIS SHOULD BE A RECALL, THERE APPEARSE DTO BE A LARGE PROBLEM WITH THIS ISSUE. *AK
NHTSA ODI #10192946
44,000 miles · Jun 1, 2007
Electrical System
2004 CHEVROLET TRAILBLAZER SPEEDOMETER IS MALFUNCTIONING. GIVES A 100 MPH READING WHEN GOING 60. SOMETIMES DOESN'T WORK AT ALL. I KNOW THERE TO BE THOUSANDS OF SIMILAR COMPLAINTS ABOUT GM SPEEDOMETERS. GM SHOULD RECALL THIS AND NOT BE AFRAID TO STAND BEHIND ITS PRODUCT. *TR
NHTSA ODI #10192253
65,000 miles · May 7, 2007
Electrical System
MOST DASHBOARD GAUGES FAILED ON THE 2004 CHEVROLET TRAILBLAZER. TOTAL LOSS OF FUEL GAUGE, AMP GAUGE, TEMPERATURE GAUGE AND OIL PRESSURE GAUGE. IN ADDITION TO THESE FAILURES ODOMETER DID NOT WORK PROPERLY. ALSO, OTHER DRIVER INFORMATION COMPUTER ITEMS DID NOT FUNCTION. ABS, PARKING BRAKE AND BATTERY LIGHTS ILLUMINATED. AFTE…
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MOST DASHBOARD GAUGES FAILED ON THE 2004 CHEVROLET TRAILBLAZER. TOTAL LOSS OF FUEL GAUGE, AMP GAUGE, TEMPERATURE GAUGE AND OIL PRESSURE GAUGE. IN ADDITION TO THESE FAILURES ODOMETER DID NOT WORK PROPERLY. ALSO, OTHER DRIVER INFORMATION COMPUTER ITEMS DID NOT FUNCTION. ABS, PARKING BRAKE AND BATTERY LIGHTS ILLUMINATED. AFTER A WHILE OF DRIVING ALL DASHBOARD FUNCTIONS RETURNED TO NORMAL. THIS HAS HAPPENED SEVERAL TIMES IN THE PAST FEW DAYS.
NHTSA ODI #10189952
38,000 miles · Apr 2, 2007
Electrical System
MY SPEEDOMETER SOMETIMES READS ABOUT 20 MPH OFF THEN WON'T RESET WHEN I TURN THE VEHICLE OFF. IT JUST STAYS AT 20 MPH...THEN SOMETIMES IT DOES RESET AND WORKS FINE. I TOOK THE VEHICLE TO A CHEVY DEALERSHIP AND THEY SAID THAT SINCE THE PROBLEM WASN'T HAPPENING AT THE TIME I TOOK IT IN THEY COULDN'T DO ANYTHING EXCEPT RE-PROGRAM…
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MY SPEEDOMETER SOMETIMES READS ABOUT 20 MPH OFF THEN WON'T RESET WHEN I TURN THE VEHICLE OFF. IT JUST STAYS AT 20 MPH...THEN SOMETIMES IT DOES RESET AND WORKS FINE. I TOOK THE VEHICLE TO A CHEVY DEALERSHIP AND THEY SAID THAT SINCE THE PROBLEM WASN'T HAPPENING AT THE TIME I TOOK IT IN THEY COULDN'T DO ANYTHING EXCEPT RE-PROGRAM THE SPEEDO. THAT DIDN'T HELP, IT HAPPENED AGAIN AFTER THAT. *JB
NHTSA ODI #10186791
52,000 miles · Mar 17, 2007
Electrical System
SPEEDOMETER DOES NOT WORK, SO I DO NOT KNOW HOW FAST I AM GOING. THE TEMPERATURE GAUGE SOMETIMES SAYS MY ENGINE IS TOO HOT WHEN IT IS NOT, SO NOW I AM NOT SURE ABOUT THE STATUS OF MY ENGINE'S COOLING SYSTEM. THIS IS AN ONGOING PROBLEM. I AM EXTREMELY CONCERNED AND DISCOVERED ON THE INTERNET THAT MANY PEOPLE ARE HAVING THIS PROBL…
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SPEEDOMETER DOES NOT WORK, SO I DO NOT KNOW HOW FAST I AM GOING. THE TEMPERATURE GAUGE SOMETIMES SAYS MY ENGINE IS TOO HOT WHEN IT IS NOT, SO NOW I AM NOT SURE ABOUT THE STATUS OF MY ENGINE'S COOLING SYSTEM. THIS IS AN ONGOING PROBLEM. I AM EXTREMELY CONCERNED AND DISCOVERED ON THE INTERNET THAT MANY PEOPLE ARE HAVING THIS PROBLEM.
NHTSA ODI #10185402
10,000 miles · Mar 8, 2007
Electrical System
INTERMITTENT HEADLIGHT AND VOLTAGE PROBLEMS, THE VEHICLE IS A 2004 TRAILBLAZER, THE PROBLEM BEGAN IN THE FALL OF 2004...HEADLIGHTS AND VOLTAGE GAUGE WOULD DIM AND DROP, WOULD CONTINUE TO DO THIS INTERMITTENTLY...DEALERSHIP REPLACED THE ALTERNATOR TWICE..ALSO THE DASH HAS BEEN REPLACED ONCE DUE TO THE VOLTAGE SPIKES CAUSED BY THI…
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INTERMITTENT HEADLIGHT AND VOLTAGE PROBLEMS, THE VEHICLE IS A 2004 TRAILBLAZER, THE PROBLEM BEGAN IN THE FALL OF 2004...HEADLIGHTS AND VOLTAGE GAUGE WOULD DIM AND DROP, WOULD CONTINUE TO DO THIS INTERMITTENTLY...DEALERSHIP REPLACED THE ALTERNATOR TWICE..ALSO THE DASH HAS BEEN REPLACED ONCE DUE TO THE VOLTAGE SPIKES CAUSED BY THIS...THE LAST TIME I TOOK IT IN THE SERVICE MANAGER TOLD ME THAT GM HAD ISSUED A BULLETIN ON THIS SAYING IT WAS " THE NATURE OF THE BEAST" THAT IT WAS CAUSED BY A SECONDARY SMOG PUMP THAT WAS SUPPOSED TO COME ON ONLY WHEN THE VEHICLE WAS 1ST STARTED...BUT COULD ALSO KEEP KICKING IN AND OUT CAUSING A SEVERE VOLTAGE DRAW...MY TRUCK NOW HAS 50,000 MILES ON IT, AM AFRAID THESE VOLTAGE SPIKES WILL TAKE OUT ANOTHER DASH, I FEEL GM HAS A SERIOUS DEFECT WITH THIS AND FEEL THIS A SERIOUS SAFETY ISSUE AS THE HEADLIGHTS ALL BUT GO OUT AT LOW SPEEDS, THE DEALERSHIP HERE HAS DONE ALL THAT GM WILL ALLOW THEM TO DO ACCORDING TO THEM. *JB
NHTSA ODI #10184500
NHTSA investigations
4RQ17002 · 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.
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