NHTSA owner reports · September 18, 2026 snapshot.
Electrical System complaints
627 reportsClear category filter68,000 miles · Jul 9, 2010
Electrical System
THE SPEED, OIL, AND TACH GAUGES ON A CHEVY TRAILBLAZER 2004 STARTED TO INDICATE INCORRECT READINGS. AFTER SOME TIME THE GAUGES WOULD JUST STOP WORKING. GM WILL REPLACE THEM FOR FEE STARTING AT $300+. NOW YOU CAN GET A USED CLUSTER TO REPLACE THIS BUT YOU WILL HAVE THE WRONG ODOMETER READING WHICH WILL CAUSE A FRAUD. GM WILL NOT …
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THE SPEED, OIL, AND TACH GAUGES ON A CHEVY TRAILBLAZER 2004 STARTED TO INDICATE INCORRECT READINGS. AFTER SOME TIME THE GAUGES WOULD JUST STOP WORKING. GM WILL REPLACE THEM FOR FEE STARTING AT $300+. NOW YOU CAN GET A USED CLUSTER TO REPLACE THIS BUT YOU WILL HAVE THE WRONG ODOMETER READING WHICH WILL CAUSE A FRAUD. GM WILL NOT RESET THE ODOMETER ON A USED CLUSTER! THIS CAUSES SOMEONE TO PAY THE HIGH PRICE OR DRIVE AROUND WITH BROKEN GAUGES. DOING A SEARCH ON THE WEB, I AM SEEING THAT THIS IS NOT JUST THE TRAILBLAZER AND THERE IS A LOT OF COMPLAINTS. I WOULD THINK NOT KNOWING THE SPEED OR OTHER INSTRUMENT READING COULD BE A SAFETY ISSUE, SINCE THEY ARE THERE FOR A REASON. *TR
NHTSA ODI #10342133
116,000 miles · Jun 29, 2010
Electrical System
YESTERDAY MY SPEEDOMETER NEEDLE STARTED JUMPING BETWEEN NUMBERS RATHER THAN MOVING SMOOTHLY. TODAY IT STOPPED WORKING COMPLETELY, IT STAYED BELOW THE 0 AND WOULDN'T REGISTER THE SPEED AT ALL. I STOPPED AT A CHEVY DEALERSHIP ON THE WAY INTO WORK AND WAS TOLD THE INSTRUMENT CLUSTER HAD TO BE REPLACED AT MY COST OF ABOUT $400. D…
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YESTERDAY MY SPEEDOMETER NEEDLE STARTED JUMPING BETWEEN NUMBERS RATHER THAN MOVING SMOOTHLY. TODAY IT STOPPED WORKING COMPLETELY, IT STAYED BELOW THE 0 AND WOULDN'T REGISTER THE SPEED AT ALL. I STOPPED AT A CHEVY DEALERSHIP ON THE WAY INTO WORK AND WAS TOLD THE INSTRUMENT CLUSTER HAD TO BE REPLACED AT MY COST OF ABOUT $400. DRIVING AWAY FROM THE DEALERSHIP THE SPEEDOMETER STARTED MOVING SLOWLY (I WAS GOING AROUND 55 MPH BUT THE SPEEDOMETER SHOWED 15 - 20 MPH.) WHEN I GOT TO WORK I RAN AN INTERNET SEARCH AND FOUND THAT THIS IS A RECALL FOR CHEVY TRUCKS BUT NOT FOR TRAILBLAZERS. ALSO FOUND NUMEROUS COMPLAINT SITES WITH CONSUMERS REPORTING THE EXACT SAME ISSUE (MODEL YEAR AND MILEAGE VARIED.) OBVIOUSLY THIS IS A WIDESPREAD ISSUE AND SHOULD BE ADDRESSED BY A RECALL FROM GM. THIS PRESENTS A SAFETY HAZARD AS MOST CONSUMERS DON'T HAVE THE MONEY FOR THE REPAIR COST SO THEY AREN'T FIXING THE FAULTY SPEEDOMETERS WHICH COULD LEAD TO ACCIDENTS AND FATALITIES. *TR
NHTSA ODI #10340599
52,000 miles · Jun 25, 2010
Electrical System
THE SPEEDOMETER GOES OFF MOST OF THE TIME YOU CAN TURN OF VEHICLE THEN JUST KEEP CLICKING AND IT WILL GO BACK TO 0 SOMETIMES YOU STAR DRIVING AND IT WILL GO START ACTING UP AGAIN AND SOMETIMES IT STAYS THE WAY IT SHOULD BE. I THINK THIS IS A SAFETY HAZARD YOU DON'T KNOW IF IT IS WORKING PROPERLY OR NOT AND YOU REALLY DON'T KNOW …
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THE SPEEDOMETER GOES OFF MOST OF THE TIME YOU CAN TURN OF VEHICLE THEN JUST KEEP CLICKING AND IT WILL GO BACK TO 0 SOMETIMES YOU STAR DRIVING AND IT WILL GO START ACTING UP AGAIN AND SOMETIMES IT STAYS THE WAY IT SHOULD BE. I THINK THIS IS A SAFETY HAZARD YOU DON'T KNOW IF IT IS WORKING PROPERLY OR NOT AND YOU REALLY DON'T KNOW THE SPEED WHICH YOU ARE TRAVELING. I HAVE REQUEST AT MANY PLACES TO FIX THE PROBLEM BUT HAVE BEEN TOLD OVER AND OVER AGAIN THAT I MAY SPEND THE MONEY TO REPLACE THE CLUSTER WHICH IS WHAT IS CAUSING THIS PROBLEM BUT IT WOULD PROBABLY DO THE SAME THING. FROM THERE KNOWLEDGE OF THIS PROBLEM THERE ARE MANY OF THESE WITH THIS PROBLEM AND I AM TOLD IF I REPLACE IT THE OTHER THAT I REPLACE IT WITH WOULD PROBABLY DO THE SAME THING. SO I AM JUST WONDERING HOW CAN THIS COMPANY GET AWAY WITH LETTING THIS PROBLEM EXIST. THIS IS A VERY UNSAFE ISSUE AND IF I CANT RESOLVE THIS I AM GOING TO HAVE TO TRADE IN FOR ANOTHER FORM OF TRANSPORTATION. PLEASE HELP ME WITH THIS ISSUE I HAVE KIDS AND A GRANDCHILD THAT DEPEND ON THIS CAR FOR TRANSPORTATION AND I WANT THEM TO BE SAFE ALL THE TIME NOT JUST SOMETIMES WHEN THE CLUSTER WANTS TO WORK. *TR
NHTSA ODI #10339943
60,000 miles · Jun 24, 2010
Electrical System
TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 65 MPH, SUDDENLY THE SPEEDOMETER DISPLAYED AN INACCURATE READING. THE READING WOULD FLUCTUATE INTERMITTENTLY AT ANY GIVEN SPEED. THE CONTACT STATED THE FAILURE COULD BE CORRECTED BY TURNING THE ENGINE OFF AND RESTARTING; AND DISAB…
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TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 65 MPH, SUDDENLY THE SPEEDOMETER DISPLAYED AN INACCURATE READING. THE READING WOULD FLUCTUATE INTERMITTENTLY AT ANY GIVEN SPEED. THE CONTACT STATED THE FAILURE COULD BE CORRECTED BY TURNING THE ENGINE OFF AND RESTARTING; AND DISABLING THE BATTERY CABLE. THE FAILURE PROGRESSED. THE VEHICLE HAD NOT BEEN DIAGNOSED OR REPAIRED AT THE TIME OF THE COMPLAINT. THE FAILURE MILEAGE WAS 60,000.
NHTSA ODI #10339825
37,000 miles · Jun 14, 2010
Electrical System
TRAILBLAZER REFUSED TO CHARGE THE BATTERY ON THE TRAVEL TRAILER. THE DASH LIGHTS OCCASIONALLY FLICKERED, THEN CAME BACK ON STRONG. GM DEALER COULD NOT FIND THE PROBLEM. A LOCAL MECHANIC SIMPLY TOOK THE COVER OFF THE ELECTRICAL DISTRIBUTION BOX AT THE FRONT RIGHT OF THE ENGINE, THEN PUSHED ALL THE WIRES DEEPER INTO THEIR CONTACT …
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TRAILBLAZER REFUSED TO CHARGE THE BATTERY ON THE TRAVEL TRAILER. THE DASH LIGHTS OCCASIONALLY FLICKERED, THEN CAME BACK ON STRONG. GM DEALER COULD NOT FIND THE PROBLEM. A LOCAL MECHANIC SIMPLY TOOK THE COVER OFF THE ELECTRICAL DISTRIBUTION BOX AT THE FRONT RIGHT OF THE ENGINE, THEN PUSHED ALL THE WIRES DEEPER INTO THEIR CONTACT SOCKETS. THAT RESOLVED THE PROBLEMS, AT LEAST UNTIL NOW. NOW THE SERVICE ENGINE LIGHT IS ON AGAIN, AND IT SAYS IT IS FOR THE PRESSURE SYSTEM. *TR
NHTSA ODI #10336180
110,000 miles · Jun 14, 2010
Electrical System
SPEEDOMETER GAUGE ONLY WORKS CORRECTLY INTERMITTENTLY. NUMEROUS GAUGE PROBLEMS AND NUMEROUS HEADLIGHT FAILURES. *TR
NHTSA ODI #10336121
Mileage unknown · Jun 11, 2010
Electrical SystemExterior Lighting
THERE ARE SEVERAL DEFECTS ON CHEVY TRAIL BLAZERS MINE IN PARTICULAR IS WITH THE INSTRUMENT CLUSTER PANEL BECAUSE IT STOPPED RECORDING THE SPEED, AMOUNT OF GAS IN MY VEHICLE, ESSENTIAL TO DRIVING SAFETY, PROPER SPEED MAINTENANCE AND ENSURING IT WONT STALL OUT DUE TO LACK OF GAS IN THE VEHICLE WHILE ON THE FREEWAY AT HIGH SPEEDS. …
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THERE ARE SEVERAL DEFECTS ON CHEVY TRAIL BLAZERS MINE IN PARTICULAR IS WITH THE INSTRUMENT CLUSTER PANEL BECAUSE IT STOPPED RECORDING THE SPEED, AMOUNT OF GAS IN MY VEHICLE, ESSENTIAL TO DRIVING SAFETY, PROPER SPEED MAINTENANCE AND ENSURING IT WONT STALL OUT DUE TO LACK OF GAS IN THE VEHICLE WHILE ON THE FREEWAY AT HIGH SPEEDS. IN ADDITION THE NIGHT LIGHTS TURN OFF RANDOMLY WHILE DRIVING AT NIGHT AND THAT IS DANGEROUS TO ME AND MY CHILDREN WHEN DRIVING AT NIGHT WHICH I DO OFTEN TO COMMUTE HOME FROM WORK. THERE ARE DIFFERENT DATES FOR THE DEFECTS THE CLUSTER PANEL GAGE WAS PROXIMATELY 6 OR 8 MONTHS OLD, THE MANUFACTURER WAS CONTACTED THEY STATED IT WAS NOT HAZARDOUS TO MY DRIVING AND THAT SINCE IT WAS NOT UNDER WARRANTY DUE TO BEING A 2004 THE BEST THEY COULD DO WAS 10% OFF, I FELT IT WAS A HAZARD AT THE TIME OF THE REPORT THEY FIXED AN ISSUE WITH THE TURN SIGNALS BUT NOW MY HEADLIGHTS ARE TURNING ON AND OFF RANDOMLY AT NIGHT AND IT IS SCARY TO BE DRIVING AT NIGHT AND YOUR LIGHTS GO OFF AND YOU CANT SEE A THING. THE LIGHTS HAVE BEEN MALFUNCTIONING FOR THE LAST 3 TO 4 MONTHS HAVE NOT REPORTED IT BECAUSE OF THE LACK OF RESPONSE BY THE MANUFACTURER WITH PRIOR ISSUE. *TR
NHTSA ODI #10335862
58,000 miles · Jun 8, 2010
Electrical System
TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE AIR BAG WARNING LIGHT WOULD INTERMITTENTLY ILLUMINATE AND THE RPM GAUGE WOULD CONTINUE TO FLUCTUATE BETWEEN RPMS. THE DEALER PERFORMED A DIAGNOSTIC AND FOUND THAT THE INSTRUMENT PANEL WAS FAILING. THE VEHICLE WAS NOT REPAIRED. IN ADDITION, THE CONTAC…
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TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE AIR BAG WARNING LIGHT WOULD INTERMITTENTLY ILLUMINATE AND THE RPM GAUGE WOULD CONTINUE TO FLUCTUATE BETWEEN RPMS. THE DEALER PERFORMED A DIAGNOSTIC AND FOUND THAT THE INSTRUMENT PANEL WAS FAILING. THE VEHICLE WAS NOT REPAIRED. IN ADDITION, THE CONTACT STATED THE SEAT BELTS WOULD NOT OPERATE AND THE INSTRUMENT PANEL COMPLETELY FAILED. THE FAILURE MILEAGE WAS 58,000 AND THE CURRENT MILEAGE WAS 73,000.
NHTSA ODI #10335199
52,000 miles · Jun 7, 2010
Electrical SystemCrash
2004 CHEVY TRAILBLAZER INSTRUMENTATION PANEL CLUSTER OUT SPEEDOMETER GAS OIL PRESSURE BATTERY AND RPM. 2 SPEEDING TICKETS. SPEEDO WAS OFF BY 40 AT THE TIME,NOW DOES NOT WORK AT ALL. NO GAS ON FREEWAY. AND BATTERY OUT CAUSED A CRASH. CHEVY DEALERSHIP REFUSES TO HELP ALTHOUGH THERE IS A RECALL FOR OTHER CHEVY PRODUCTS WITH SIMILAR…
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2004 CHEVY TRAILBLAZER INSTRUMENTATION PANEL CLUSTER OUT SPEEDOMETER GAS OIL PRESSURE BATTERY AND RPM. 2 SPEEDING TICKETS. SPEEDO WAS OFF BY 40 AT THE TIME,NOW DOES NOT WORK AT ALL. NO GAS ON FREEWAY. AND BATTERY OUT CAUSED A CRASH. CHEVY DEALERSHIP REFUSES TO HELP ALTHOUGH THERE IS A RECALL FOR OTHER CHEVY PRODUCTS WITH SIMILAR PROBLEMS. CHEVY SERVICE DEPARTMENT OFFERS NOTHING AND REFUSES TO HELP OR ACKNOWLEDGE ANYTHING WRONG. THIS IS A SAFETY PROBLEM I AM NOT THE ONLY ONE HAVING THIS PROBLEM. PLEASE HELP FORCE GM TO RECALL THE INSTRUMENT CLUSTER PANEL. *TR
NHTSA ODI #10335124
70,000 miles · Jun 7, 2010
Electrical System
MY WIFE OWNS A 2004 CHEVY TRAILBLAZER AND THE INSTRUMENT CLUSTER IS GOING HAYWIRE. WE HAVE ALREADY SPENT HUNDREDS OF DOLLARS TAKING IT TO THE DEALERSHIP TO HAVE IT FIXED WITH NO SUCCESS. I AM A PRETTY GOOD MECHANIC, BUT NOT WHEN IT COMES TO ALL THE ELECTRONICS ON CARS THESE DAYS. I REFUSE TO TAKE IT BACK AND GET SCREWED OUT OF M…
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MY WIFE OWNS A 2004 CHEVY TRAILBLAZER AND THE INSTRUMENT CLUSTER IS GOING HAYWIRE. WE HAVE ALREADY SPENT HUNDREDS OF DOLLARS TAKING IT TO THE DEALERSHIP TO HAVE IT FIXED WITH NO SUCCESS. I AM A PRETTY GOOD MECHANIC, BUT NOT WHEN IT COMES TO ALL THE ELECTRONICS ON CARS THESE DAYS. I REFUSE TO TAKE IT BACK AND GET SCREWED OUT OF MORE MONEY. I GUESS THIS IS HOW CHEVROLET IS MAKING UP FOR THEIR LOSS. I STILL CAN'T BELIEVE THAT THERE IS NOT A RECALL ON THIS AS OF YET. THE INTERNET IS LOADED WITH COMPLAINTS WITH THIS ISSUE. I HAVE ALWAYS BEEN A CHEVY MAN, BUT IT LOOKS LIKE I MAY END UP CHANGING MY LOYALTY TO ANOTHER COMPANY. WITH AS MUCH AS WE HAVE TO PAY FOR VEHICLES THESE DAYS WE SHOULD BE RECEIVING BETTER SERVICE ON THEM. I WILL BE BUYING A USED CLUSTER OFF THE INTERNET AND INSTALLING IT MYSELF. THE DEALERSHIP EVEN WANTS A FORTUNE TO REPLACE A PART THEY SHOULD HAVE A RECALL ON ANYWAY. *TR
NHTSA ODI #10334964
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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