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KLUNK
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2004 Chevrolet Trailblazer

The Verdict

5 Total Klunk

The 2004 Chevrolet Trailblazer has 1,367 owner complaints filed with NHTSA. The most reported issues are electrical (839 complaints) and engine (280 complaints). With a Klunk Score of 5/100, it earns a "Total Klunk" rating. If you're shopping for a Chevrolet Trailblazer, consider the 2025 model year which has 98% fewer complaints.

Safe Bet

The 2025 has 98% fewer complaints

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5

Klunk Score: Total Klunk

Among the most complained-about vehicle years on record. Strongly consider alternatives.

How is this calculated?

The Klunk Score ranks this vehicle year against all others in our database based on total owner complaints filed with NHTSA. 100 = fewest complaints (top tier), 0 = most complained-about. Scores above 60 are better than average; below 40 means more problems than most.

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Under the Hood

Each number is a complaint. Darker = bigger problem.

YearBodyBrakesElectricalEngineTransmission
200226150347323306
200325839469370130
20041572283928069
20051432772878746
20061362234180443
2007861032334914
2008361594419
2009112141
20215726234330
20223211122026
2023101212189
202484893
202531735

By Category

Electrical
839
Engine
280
Body
157
Transmission
69
Brakes
22

By Severity

1
627
2
635
3
9
4
93
5
3

Worst Problems

Complaints

Electrical 4

I was driving and a girl pulled out from a stop sign and hit my passenger side front of my trailblazer. Her airbags deployed immediately, meanwhile mine didn't deploy. My husband saved my face by throwing his arm over me!

11mo ago
Electrical 2

The contact owns a 2004 Chevrolet Trailblazer. The contact stated while driving at various speeds, the headlights became inoperable. After a while, the headlights became operational. There were no warning lights illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The approximate failure mileage was 189,000.

46mo ago
Engine 1

Electronic throttle body? No throttle control, motor will only idle, turn ignition switch off, then restart it will run. Reduced Engine Power light comes on. Happens for no apparent reason. Very unsafe situation.

55mo ago
Body 4

The contact owned a 2004 Chevrolet Trailblazer. The contact stated that while driving at an undisclosed speed, there was smoke coming from the rear passenger side. The contact pulled over and noticed that underneath the rear passenger's seat had caught fire. The fire department was able to extinguish the fire. The contact sustained burns to his left shoulder, hands, and elbows. However, no medical treatment was received. A police report was filed. The contact was unaware if there was a fire department report. The vehicle was towed to a tow yard and deemed totaled by the insurance company. The manufacturer was not made aware of the failure. The failure mileage was approximately 153,000. Vehicle caught on fire on the inside driving.

55mo ago
Body 1

The contact owns a 2004 Chevrolet Trailblazer equipped with Hankook tires Model:Dynapro HT Tire Size: P245/70R16 Dot Number:Unknown. The contact stated that she had both rear tires, driver side and passenger side, replaced with the Hankook tires by an independent mechanic. After the instillation, the contact stated that the vehicle would shake while driving at various speeds without warning . The vehicle was taken to another independent mechanic who inspected the tires and made adjustments; however, the shaking persisted. While driving at 65 MPH, the lost control of the vehicle's steering as the vehicle began to abruptly fishtail. As the vehicle continued to spin out of control, the contact was able to stop the vehicle moments before the vehicle hit a highway barrier. The contact discovered that the rear driver side tire tread had separated from the rim of tire. Due to the failure, the contact had the tire replaced with a spare and was able to drive the vehicle home. The contact called the place where the tires were purchased; they offered no assistance and stated they were no responsible for the failure. The manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired. The tire failure mileage was approximately 1,700. The vehicle failure mileage was approximately 89,000.

56mo ago
Engine 1

FUL PUMP

63mo ago
Electrical 2

MY CLUSTERBOARD IS COMPLETELY NON FUNCTIONING THE READINGS ARE NOT WORKING

67mo ago
Engine 1

TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THE HE NOTICED A FUEL ODOR EMITTING FROM UNDERNEATH THE DRIVER'S SIDE OF THE VEHICLE. THE CONTACT ALSO STATED THAT THE FUEL MILEAGE HAD ALSO DECREASED WHEN DRIVING THE VEHICLE. THE CONTACT TOOK THE VEHICLE TO HAVE AN EVAP SMOKE TEST PERFORMED ON HIS VEHICLE. THE RESULT OF THE TEST DISCOVERED THAT A CRACK HAD FORMED ON THE FUEL NECK THAT CONNECTS TO THE FUEL TANK, WHICH WAS THE CAUSE OF THE FAILURE. THE CONTACT THEN SPOKE WITH J.B.A. CHEVROLET (7327 RITCHIE HWY, GLEN BURNIE, MD 21061) WHERE HE WAS INFORMED THAT THERE WERE NO RECALLS ON THE VEHICLE FOR THE FAILURE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 126,432.

72mo ago
Engine 1

TRANSMISSION SLIPPING AND THE HEATER CIRCUIT. *TR

74mo ago
Engine 2

AS YOU COME TO A COMPLETE STOP OR GO UNDER 5 MPH, THE VEHICLE'S OIL GAUGE WILL GO ALL THE WAY DOWN. ONCE YOU ACCELERATE, THE OIL GAUGE GOES BACK TO NORMAL. WHEN PUMPING GAS INTO THE VEHICLE, THE GAS PUMP WILL RESET AS IF THE GAS TANK IS FULL BUT THE GAUGE SHOWS IT'S HALF EMPTY. *TR

74mo ago
Electrical 2

MOST OF THE GAUGES ARE VERY ERRATIC WHEN IN MOTION OR STOPPED. TACHOMETER JUMPS AROUND, OIL PRESSURE READS ALL OVER, SPEEDOMETER GOES TO ZERO OR FULL SCALE, AMP METER DROPS BELOW 14 AND LIGHTS DIM WHEN THIS HAPPENS, (HAVE HAD THE ALTERNATOR REPLACED 3 TIMES, THIS IS QUITE A SAFETY CONCERN FOR ME AS I HAVE NO IDEA WHAT TO BELIEVE ON ANY OF THE GAUGES. NO REPAIR SHOP HAS BEEN ABLE TO SOLVE THE PROBLEM.

78mo ago
Body 4

TL* THE CONTACT'S SON OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT THE DRIVER'S SIDE WINDOW LOOKED ABNORMAL. WHEN THE DOOR WAS OPENED, THE CONTACT NOTICED THAT THE DRIVER'S SEAT HAD CAUGHT FIRE AND EXTINGUISHED ITSELF OUT. FIRE AND POLICE REPORTS WERE NOT FILED. THERE WERE NO INJURIES. THE VEHICLE WAS NOT TAKEN TO A DEALER OR INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING OR REPAIRS. THE MANUFACTURER INFORMED THE CONTACT THAT THERE WAS NO RECALL TO PROVE THAT THE MALFUNCTION WAS A MANUFACTURER DEFAULT. THE VIN WAS NOT AVAILABLE. THE FAILURE MILEAGE WAS APPROXIMATELY 190,000. *LN PHOTOS ATTACHED. *JB

82mo ago
Electrical 4

WELL I HIT A TREE AN THE AIRBAGS DIDN'T DEPLOYED BUT THE AIRBAG LIGHT IS ON

82mo ago
Electrical 2

1 OWNER VEHICLE - BOUGHT IN 2004 & HAD 8 MILES ON IT. HAS BEEN VERY WELL KEPT & CURRENTLY HAS ONLY 65,000 MILES ON IT AS OF 9/16/19. AS OTHERS, THE ELECTRICAL CLUSTER HAS MALFUNCTIONED. SPEEDOMETER QUIT WORKING OVER A YEAR AGO & NOW THE FUEL GAUGE HAS FAILED. PROBLEM IS WITH THE CLUSTER AS "ESTIMATED MILEAGE" STILL WORKS. HAVE NOTICED THAT OTHER GAUGES ACT ERRATIC AT TIMES. THIS HAS BEEN AN ONGOING ISSUE THAT CHEVY IS WELL AWARE OF YET FAIL TO ACT. TO TB TO DEALER FOR REPAIRS THEY STATED THERE IS NO RECALL. COST OUT OF MY POCKET FOR REPAIR WILL BE OVER $800.00. SPEEDOMETER ORIGINALLY FAILED WHILE DRIVING ON HWY. IT STARTED TO WORK AGAIN BUT FAILED AGAIN WHILE DRIVING ON THE HWY A FEW WEEKS LATER. FUEL GUAGE SIMPLY STOPPED WORKING AFTER STARTING VEHICLE.

83mo ago
Electrical 2

TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. WHILE DRIVING APPROXIMATELY 45 MPH, THE LOW BEAM HEADLIGHTS WENT OUT WITHOUT WARNING. THE FAILURE RECURRED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO WAS UNABLE TO DUPLICATE THE FAILURE; HOWEVER, THEY REPLACED THE FRONT PANEL SWITCH AND CONNECTOR. THE FAILURE RECURRED. THE DEALER AND MANUFACTURER WERE NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 146,577.

84mo ago
Electrical 3

WHEN DRIVING OUR VEHICLE FROM MYRTLE BEACH THIS WEEK WE NOTICED A SMELL ABOUT HALF WAY HOME THAT REEKED OF ROTTEN EGGS. THE SMELL WAS SO BAD THAT I BECAUSE NAUSEOUS AND DEVELOOED A SEVERE HEADACHE. AFTER WE REACHED OUR HOUSE AND SHUT OFF THE VEHICLE THE NEXT DAY I TRIED TO CRANK THE VEHICLE AND IT WOULD NOT CRANK SO AFTER RESEARCHING THE SMELL AND POSSIBLE CAUSES WE BOUGHT A NEW BATTERY FOR THE VEHICLE AND CHANGED THE BATTERY OURSELVES WHICH CAUSED MY HUSBAND TO DEVELOP A SEVERE COUGH AND UPPER RESPITORY PROBLEMS DUE TO THE BOILING THAT WAS OCCURING INSIDE THE BATTERY. HENCE THE SMELL OF ROTTEN EGGS.

84mo ago
Transmission 2

ACCELERATING ON IT'S OWN AND IDLING

84mo ago
Engine 1

SMELL OF GAS WHEN DRIVING VERY STRONG MUST DRIVE WITH WINDOW OPEN

85mo ago
Electrical 4

TAKATA RECALL/ I WAS IN A ACCIDENT AND MY AIR BAGS NEVER WENT OFF WHY IS THAT I THOUGHT IT WAS A SAFTEY FEATURE?

85mo ago
Body 1

TL* THE CONTACT OWNS A 2004 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT WHILE THE BRAKES WERE BEING SERVICED BY AN INDEPENDENT MECHANIC, THE TECHNICIAN NOTICED THAT THE ENTIRE FRONT END FRAME WAS RUSTED. THE DEALER AND THE MANUFACTURER WERE NOT CONTACTED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 150,542.

86mo ago

1367 total

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