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2004 Chevrolet Trailblazer Ext Problems and Recalls

Owners filed 261 complaints with NHTSA about the 2004 Chevrolet Trailblazer Ext, most often about the electrical (56% of complaints, typically around 63,000 miles). It is the 2nd most complained-about Trailblazer Ext model year since 2000 and has 1 recall.

Complaints261
Recalls1
Crashes reported6
Fires reported3
Injuries reported13

Most common 2004 Chevrolet Trailblazer Ext problems

  1. Electrical

    145 complaints · 56%

    Half of these problems showed up before 63,000 miles. Parts named most often: instrument cluster/panel.

    I have a 2004 trailblazer with the same problems with the recall that is going on with gm. The instrument cluster is doing the same exact thing as the tahoe, avalanche, and I forgot what the other the car was. The fuel, water, and battery gauges, the airbag light, a long with the battery light stays on. Went to the…
    Owner report to NHTSA, 2008, at 62,580 miles
    I am complaining about a 2004 chevy trailblazer problem the speedometer is measuring incorrect speed or not working at all. I can be parked and it reads 60 MPH I am driving it reads 120 MPH. In speaking with several gm owners this is a problem with quite a few gm vehicles and is very dangerous. I think this should be…
    Owner report to NHTSA, 2006, at 62,000 miles
  2. Fuel system

    46 complaints · 18%

    Half of these problems showed up before 81,500 miles. Parts named most often: storage, delivery, fuel injection system.

    The nipple part of the fuel tank that connects the filler line to the fuel tank has cracked and leaks fuel when we fill up and when we drive and do to the fact that we park in the garage with the (wet) leaky side of the fuel tank within five feet of our gas water heater we are lucky people to be alive. (this is a…
    Owner report to NHTSA, 2009, at 80,000 miles
    Lights started flashing, gas gauge went to empty, car died. Restarted drove 1/4 mile died. Stereo system completely failed (whole unit). Keeps popping circuits changed out still doing. Cannot shut off heat due to banging sound. Car speeds up and down on own. Cannot read gas gauge correctly, not sure how full tank is.
    Owner report to NHTSA, 2014, at 83,000 miles
  3. Engine

    21 complaints · 8%

    Half of these problems showed up before 72,500 miles. Parts named most often: exhaust system, engine.

    Ticking noise from engine has been diagnosed as a cracked exhaust manifold. This should be covered by gm as a warranty item since there have been so many exhaust manifold failures related to the 4.2 liter six cylinder engine.
    Owner report to NHTSA, 2009, at 70,000 miles
    2004 trailblazer , transmission dipstick rusted and broke, transmission went out from water getting inside / do not know how this could have happened ! And the bearings in the waterpump went out leaving the fan shaft wiggling / loose. With only 65000 miles on my trailblazer not traveling no faster than 75 MPH max.…
    Owner report to NHTSA, 2009, at 65,459 miles
  4. Transmission

    17 complaints · 7%

    Half of these problems showed up before 65,500 miles. Parts named most often: automatic transmission, driveline, transfer case (4-wheel drive).

    2004 trailblazer, the transmission dip stick rusted and broke and water in transmission. Transmission went out. Many other owners having same problem with same 2004 trailblazers. Bad dip stick manufacture position getting water inside.
    Owner report to NHTSA, 2009, at 65,465 miles
    2004 trailblazer , transmission dipstick rusted and broke, transmission went out from water getting inside / do not know how this could have happened ! And the bearings in the waterpump went out leaving the fan shaft wiggling / loose. With only 65000 miles on my trailblazer not traveling no faster than 75 MPH max.…
    Owner report to NHTSA, 2009, at 65,459 miles
  5. Lights

    13 complaints · 5%

    Half of these problems showed up before 59,000 miles. Parts named most often: turn signal, brake lights.

    I was driving my trailblazer to minneapolis and the turn signals were working fine, I stop and when I started driving again I went to use my left turn signal and the flashers went on instead. It continued to do this everytime I used it. I had to go and get the flasher modules replace at the cost of 200.00. I see that…
    Owner report to NHTSA, 2008, at 59,000 miles
    Starting june 17, 2008, the low beams on my 2004 Chevrolet trail blazer lt go out intermittently - the high beams, fog lights, hazard lights, and turn signal lights still work - only low beams causing problems. I keep my lights setting in the postion that they come on when I start my car. I consider this a safety…
    Owner report to NHTSA, 2008, at 44,000 miles
  6. Speed control

    9 complaints · 3%

    Half of these problems showed up before 53,500 miles.

    The speedometer sticks and does not give accurate readings of speed (I.e. 70mph when stopped at traffic light). This began today and has not corrected itself. There are serious potential consequences of this problem as drivers will not be able to know their true speed. Nothing has been done yet to correct the failure.…
    Owner report to NHTSA, 2009, at 51,320 miles
    2004 Chevrolet Trailblazer Ext. Rpm gauge stop working and then now the RPM and speedometer is not working. I found a number of reports from others online stating that their RPM and speedo also stopped working. I have seen no recalls on this problem. I have no idea how fast I'm traveling.
    Owner report to NHTSA, 2011, at 62,500 miles
  7. Equipment

    8 complaints · 3%

    Half of these problems showed up before 48,500 miles. Parts named most often: electrical.

    I have a 2004 chevy trailblazer with about 79000 miles on it. The instrument cluster started being incorrect about a year and a half ago. At that time I was not aware of what the problem was and did not realize that this problem is so widespread among trailblazer owners. The gauges stick. When this first started it…
    Owner report to NHTSA, 2010, at 48,000 miles
    1. Normal driving, 2. The cd player will not eject the cd, 3. Attempted to get it out and then researched for how to's and found it was impossible to fix without getting a new stereo.
    Owner report to NHTSA, 2011, at 49,000 miles
  8. Steering

    8 complaints · 3%

    Half of these problems showed up before 53,500 miles. Parts named most often: linkages, column, hydraulic power assist.

    : the contact stated while at a stop, the steering wheel was adjusted, but would not lock in position. The vehicle was taken to the sales/service dealer. On inspection, the contact was informed that the tilt rack would not lock and the steering column needed to be replaced. The manufacturer was notified.
    Owner report to NHTSA, 2006, at 46,250 miles
    In cold weather, the steering fluid becomes filled with air. Then it foams and boils out of the pump.the car is impossible to steer. It has done it twice.
    Owner report to NHTSA, 2012, at 90,000 miles

Complaints are owner reports to NHTSA, not verified defects. One complaint can name several components, so shares add up to more than 100%.

2004 Chevrolet Trailblazer Ext recalls

  1. Lights: brake lights

    NHTSA 04V527000 · November 1, 2004 · 871,473 vehicles

    Risk: 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.

    Fix: 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.

    Full defect summary

    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.

Recall repairs are free at any franchised dealer. Enter your VIN at nhtsa.gov/recalls to see which recalls are still open on your car.

NHTSA defect investigations

Questions about the 2004 Chevrolet Trailblazer Ext

What are the most common problems with the 2004 Chevrolet Trailblazer Ext?
By NHTSA owner complaints: electrical (145 complaints, typically around 63,000 miles); fuel system (46 complaints, typically around 81,500 miles); engine (21 complaints, typically around 72,500 miles).
How many recalls does the 2004 Chevrolet Trailblazer Ext have?
1 recall listed by NHTSA, the latest from November 1, 2004 (lights). Check your VIN at nhtsa.gov/recalls to see which ones are still open on your car.
Is the 2004 a bad year for the Chevrolet Trailblazer Ext?
It is the 2nd most complained-about Trailblazer Ext model year since 2000, with 261 complaints. Complaint counts are not adjusted for how many cars were sold, so popular years collect more of them, and the newest years have had less time to.

Other Chevrolet Trailblazer Ext years

Chevrolet Trailblazer Ext problems by year