NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
1,081 reportsMileage unknown · Mar 25, 2007
Vehicle Speed Control
2004 CHEVROLET TRAILBLAZER. IT SHOWED ZERO WHEN I AM GOING AT LEAST 40 MPH, THEN MOVES A LITTLE, AND NOW IS SHOWING LIKE 110 MPH WHEN I AM GOING AROUND 50 MPH. I HAVE NOTICED THAT THIS WAS A COMMON PROBLEM WITH MY VEHICLE. I HAVE AROUND 56,000 MILES ON IT. IS GM PLANNING ON A RECALL, THISWASA EXTREMELY DANGEROUS AND I SHOU…
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2004 CHEVROLET TRAILBLAZER. IT SHOWED ZERO WHEN I AM GOING AT LEAST 40 MPH, THEN MOVES A LITTLE, AND NOW IS SHOWING LIKE 110 MPH WHEN I AM GOING AROUND 50 MPH. I HAVE NOTICED THAT THIS WAS A COMMON PROBLEM WITH MY VEHICLE. I HAVE AROUND 56,000 MILES ON IT. IS GM PLANNING ON A RECALL, THISWASA EXTREMELY DANGEROUS AND I SHOULD NOT HAVE TO BEAR THE COST OF REPAIRS. *AK
NHTSA ODI #10186099
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
48,000 miles · Mar 6, 2007
Electrical System
SPEEDOMETER FAULTY AND SHOWING WILDLY INACCURATE SPEEDS. WHEN DRIVING ON A HIGHWAY, THE SPEEDOMETER WILL RANGE FROM 10 MPH TO 120 MPH! WHILE CONDUCTING RESEARCH ONLINE, THIS APPEARS TO BE A MAJOR WIDESPREAD PROBLEM WITH GM TRUCKS AND THEY HAVE NOT TAKEN ANY ACTION TO CORRECT THIS DANGEROUS SITUATION. MY VEHICLE IS RECENTLY OU…
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SPEEDOMETER FAULTY AND SHOWING WILDLY INACCURATE SPEEDS. WHEN DRIVING ON A HIGHWAY, THE SPEEDOMETER WILL RANGE FROM 10 MPH TO 120 MPH! WHILE CONDUCTING RESEARCH ONLINE, THIS APPEARS TO BE A MAJOR WIDESPREAD PROBLEM WITH GM TRUCKS AND THEY HAVE NOT TAKEN ANY ACTION TO CORRECT THIS DANGEROUS SITUATION. MY VEHICLE IS RECENTLY OUT OF WARRANTY AND THE REPAIR WILL COST OVER $600. *JB
NHTSA ODI #10184287
45,000 miles · Mar 5, 2007
Electrical System
THE SPEEDOMETER IN MY 2004 CHEVY TRAILBLAZER BEGAN TO SHOW THE WRONG SPEED AT ABOUT 45,000 MILES. THE NEEDLE WOULD INCREASE WITH SPEED AS IT SHOULD HAVE BUT WOULD NOT GO BACK DOWN AGAIN LIKE IT SHOULD. THEN IT QUIT WORKING ALTOGETHER AND THE NEEDLE JUST HANGS LIMP. WE HAD THE SPEEDOMETER DIAGNOSED AT ANOTHER FACILITY SINCE THIS …
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THE SPEEDOMETER IN MY 2004 CHEVY TRAILBLAZER BEGAN TO SHOW THE WRONG SPEED AT ABOUT 45,000 MILES. THE NEEDLE WOULD INCREASE WITH SPEED AS IT SHOULD HAVE BUT WOULD NOT GO BACK DOWN AGAIN LIKE IT SHOULD. THEN IT QUIT WORKING ALTOGETHER AND THE NEEDLE JUST HANGS LIMP. WE HAD THE SPEEDOMETER DIAGNOSED AT ANOTHER FACILITY SINCE THIS OCCURRED AROUND THE HOLIDAYS AND GM DEALERS COULD NOT GET US IN. MY WIFE HAS BEEN COMMUTING 20-30 MILES DAILY HAVING NO IDEA HOW FAST SHE IS GOING BECAUSE GM REFUSES TO CORRECT THE PROBLEM. I HAVE FOUND HUNDREDS OF SIMILAR STORIES AFTER RESEARCHING IT ON THE INTERNET. EVERY PERSON I KNOW WITH A LARGE GM VEHICLE HAS HAD TO REPLACE IT BETWEEN 40,000 AND 50,000 MILES. THE FACILITY THAT DIAGNOSED THE PROBLEM SAID THAT THE SPEEDOMETER HEAD WAS STRIPPED AND THE DEALERSHIPS KNOW THE PRICE OF THIS PART OFF THE TOP OF THEIR HEADS, PRESUMABLY BECAUSE THEY REPLACE MANY OF THEM. *JB
NHTSA ODI #10184189
32,262 miles · Feb 26, 2007
Service Brakes, Hydraulic
WHEN CHECKING MY BRAKES I NOTICED THAT THE INSIDE OF THE FRONT BRAKE ROTORS WHERE CORRODED AND RUSTY. THE VEHICLE IS A 2004 CHEVROLET TRAILBLAZER WITH 32,262 HIGHWAY MILES. APPROXIMATELY 25-30% OF THE INSIDE OF THE ROTOR WERE RUSTED AND HAD WORN DOWN THE BRAKE PAD. SO ONLY 70% OF THE INSIDE BRAKE PAD WAS BEING USED FOR BRAKING.…
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WHEN CHECKING MY BRAKES I NOTICED THAT THE INSIDE OF THE FRONT BRAKE ROTORS WHERE CORRODED AND RUSTY. THE VEHICLE IS A 2004 CHEVROLET TRAILBLAZER WITH 32,262 HIGHWAY MILES. APPROXIMATELY 25-30% OF THE INSIDE OF THE ROTOR WERE RUSTED AND HAD WORN DOWN THE BRAKE PAD. SO ONLY 70% OF THE INSIDE BRAKE PAD WAS BEING USED FOR BRAKING. THIS CAUSES THE BRAKE PADS TO WEAR UNEVENLY. APPEARS THAT THIS COULD BE SERIOUS IN AN EMERGENCY SITUATION. I CHECKED THE REAR ROTORS AND THEY ARE STARTING TO DO THE SAME BUT ONLY 1/2" ON THE OUTER EDGE OF BRAKE ROTOR IS RUSTED. I CHECKED THE RECALLS AND THERE WERE NONE FOR BRAKES. I CHECKED WITH CHEVY AND THEY ARE NOT AWARE OF ANY PROBLEMS. IN CHECKING WEBSITES, TRAILBLAZERCLUB AND TRAILVOY, OTHER PEOPLE HAVE HAD THE SAME OR SIMILAR ISSUE. I WOULD ASSUME THAT THERE IS A PROBLEM WITH THE METAL. *NM
NHTSA ODI #10183504
46,200 miles · Feb 25, 2007
Fuel System, Gasoline
2004 TRAILBLAZER LS WITH CODE P0455 DIAGNOSED WITH BROKEN/CRACKED SEAM ON FUEL TANK INLET NECK. VERY STRONG FUEL ODORS BOTH INSIDE AND OUTSIDE VEHICLE. CHEVY ACKNOWLEDGED THIS SAME PROBLEM WITH THE 2002 MODELS VIA CAMPAIGN #05012. THIS IS A SAFETY ISSUE, CAN LEAKING FUEL AND/OR BREATHING FUMES BE DEEMED AS SAFE? CHEVY NEEDS TO S…
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2004 TRAILBLAZER LS WITH CODE P0455 DIAGNOSED WITH BROKEN/CRACKED SEAM ON FUEL TANK INLET NECK. VERY STRONG FUEL ODORS BOTH INSIDE AND OUTSIDE VEHICLE. CHEVY ACKNOWLEDGED THIS SAME PROBLEM WITH THE 2002 MODELS VIA CAMPAIGN #05012. THIS IS A SAFETY ISSUE, CAN LEAKING FUEL AND/OR BREATHING FUMES BE DEEMED AS SAFE? CHEVY NEEDS TO STEP UP AND PROACTIVELY FIX THE PROBLEM ON ALL TRAILBLAZER MODELS. I KNOW BOTH NHTSA AND CHEVY KNOW OF THIS PROBLEM ALREADY, SO ARE LIABLE IF NOTHING IS DONE. *JB
NHTSA ODI #10183440
32,000 miles · Feb 20, 2007
Electrical System
MY 2004 CHEVY TRAILBLAZERS SPEEDOMETER STARTED MALFUNCTIONING. IT WILL REGISTER SPEEDS 25-35 MILES PER HOUR OVER ACTUAL. IT ALSO DOES NOT OPERATE SMOOTHLY BUT JERKS TO THE NEXT NUMBER. VERY DANGEROUS, AND VERY EXPENSIVE TO FIX. IT APPEARS THAT THIS IS ALSO HAPPENING ON THE ENVOY, TAHOE AND AVALANCHE MODELS. THIS SHOULD BE Q…
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MY 2004 CHEVY TRAILBLAZERS SPEEDOMETER STARTED MALFUNCTIONING. IT WILL REGISTER SPEEDS 25-35 MILES PER HOUR OVER ACTUAL. IT ALSO DOES NOT OPERATE SMOOTHLY BUT JERKS TO THE NEXT NUMBER. VERY DANGEROUS, AND VERY EXPENSIVE TO FIX. IT APPEARS THAT THIS IS ALSO HAPPENING ON THE ENVOY, TAHOE AND AVALANCHE MODELS. THIS SHOULD BE QUALIFIED AS A SAFETY RECALL. *JB
NHTSA ODI #10183092
47,000 miles · Feb 10, 2007
Latches/locks/linkages
REAR HATCH WINDOW POPS OPEN WHILE DRIVING. THIS HAS HAPPEN FOUR TIME THIS WEEK ALONE. *NM
NHTSA ODI #10182177
36,000 miles · Feb 7, 2007
Fuel System, Gasoline
TL*- THE CONTACT OWNS A 2004 CHEVROLET TRAIL BLAZER EXT WITH AN ODOMETER READING OF 40,000 MILES. THE FAILURE MILEAGE WAS 36,000. THE FIRST INCIDENT INVOLVED LEAK IN A FUEL HOSE AND THE SECOND WAS A CRACK IN THE FUEL TANK. THE DEALER ADVISED THE CONTACT TO CALL AND COMPLAIN TO NHTSA SINCE THE 2004 ARE NOT UNDER THE RECALL, AN…
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TL*- THE CONTACT OWNS A 2004 CHEVROLET TRAIL BLAZER EXT WITH AN ODOMETER READING OF 40,000 MILES. THE FAILURE MILEAGE WAS 36,000. THE FIRST INCIDENT INVOLVED LEAK IN A FUEL HOSE AND THE SECOND WAS A CRACK IN THE FUEL TANK. THE DEALER ADVISED THE CONTACT TO CALL AND COMPLAIN TO NHTSA SINCE THE 2004 ARE NOT UNDER THE RECALL, AND THE 2002 ARE UNDER RECALL FOR THE SAME ISSUE. THE DEALER HAD TEMPORARILY REPAIRED THE VEHICLE. THE CONTACT SMELLS FUMES WHILE DRIVING. THE FUMES ARE DETECTABLE WHILE DRIVING AT ANY SPEED. THE CONTACT DID NOT HIT ANYTHING TO CAUSE THE DAMAGE. THE CONTACT HAS REPAIR INVOICES AND PICTURES.
NHTSA ODI #10182662
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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