Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

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hardly worth mentioning
Crashes / Fires:
0 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
54,309 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Chevrolet Trailblazer EXT transmission problems

transmission problem

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2004 Chevrolet Trailblazer EXT Owner Comments

problem #11

Oct 142008

Trailblazer EXT 4WD 6-cyl

  • 123,045 miles


Transmission slipping between 3rd and 4th gear. Engine revs in neutral, then transmission would re-engage. Failure would occur everytime vehicle was driven. Repaired by complete transmission rebuild.

- Syracuse, NY, USA

problem #10

Nov 192010

Trailblazer EXT

  • miles
About 10 miles outside of dallas my check engine light came on but no initial problems. Later that night while driving on the interstate the car would not go faster than 30mph. I returned home that night and left it parked. The next day took it to autozone and the guy did an engine check stating that my transmission has gone out and that it was low on fluids. I added 3 quarts of transmission fluid which seemed to help a little bit, but I do not feel comfortable enough making an 8 hr trip back home.

- Topeka, KS, USA

problem #9

May 142010

Trailblazer EXT

  • 117,000 miles
Driving normally, put car in park, put car back in drive crunching noise, car no longer has reverse or 2nd gear.

- N Chelmsford , MA, USA

problem #8

Apr 162009

Trailblazer EXT

  • miles


I bought my 2004 trailblazer new in 2004 and it has been ok. I got in it last Thursday and put it in reverse to back out of my basement to go to work. It made a horrible noise so I got my husband up to look at it. Come to find out reverse went out on the transmission. The repair shop said reverse was out and some gears were worn. I had no warning and this just happened. This repair person told us this was weak link on the trailblazers and the transmissions would go just like that. If this is a weak link, GM should recall and fix the problem. I did not take out the extended warranty and I only have about 89,000 miles on the vehicle.

- Quinton, AL, USA

problem #7

Mar 092009

Trailblazer EXT

  • 65,459 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. This should not have happened. My friends with the same trailblazer is having the same thing happening. I serviced every 3500 miles since owned 2005. Please help if can.

- Lawrenceburg, IN, USA

problem #6

Mar 072009

Trailblazer EXT

  • 65,465 miles
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.

- Lawrenceburg, IN, USA

problem #5

Jul 272008

Trailblazer EXT

  • 46,069 miles


Automatic transmission shifted out of third and would not shift back while I was on the freeway. Dealer said a transmission flush and fluid change would fix it. After performing flush dealer transmission was shot and needed replacement. Instrument cluster functioning intermittently, speedometer works at first and then slowly goes down to zero.

- Fresno, CA, USA

problem #4

Dec 142007

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 71,256 miles
The reverse transmission bell housing blows out. This is the second Chevrolet vehicle I have owned and the same problem on both the first time $2400 later it was fixed, and now $2200 later the problem will be fixed. I know of 3 people so far that have had the same problem. I will assure you this will be the last Chevrolet vehicle I will buy unless this problem is fixed. Please respond.

- Silver Grove, KY, USA

problem #3

Jul 262006

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 46,000 miles
: the contact stated that while driving up a driveway at 10 mph, the transmission slipped, and would not accelerate when the pedal was depressed. The vehicle was not taken in for service.

- Caldwell, NJ, USA

problem #2

Mar 252005

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 39,000 miles
Transmission shifts hard from 1st to 2nd, sometimes when at a stop it stalls before taking off, sometimes RPM bottoms out. 4 wheel drive only used about 3 or 4 times, each time it stalled before going into 4 wheel then would not come out of 4 wheel for about 2 or 3 minutes.

- Glasgow, KY, USA

problem #1

Feb 022006

Trailblazer EXT 6-cyl

  • Automatic transmission
  • 24,100 miles
Full destruction because of fire I was on the way back from a long trip in southern chile (up to ushuaia) over the "carretera austral" and, after about 9'000 km drive without any problem, I saw a white smoke back my vehicle. Oil pressure: Normal, motor temperature: Normal. This meant immediate stop along the "ruta 40 norte" in argentina (about 100 km North of bariloche, on the way to neuqu). While stopping, I felt the brake pedal just going without immediate reaction but the pression came back. While bringing the gear shift to position parking, I did not feel any sensation, as if it would have no connection; the automatic door blocker connected to the gear shift did not work too, so that we had to unlock the doors manually. After having disconnected the engine, I saw white smoke coming out from the upper left corner of the motor. I opened the capot and the smoke came from the left corner (close to the driver's place). Suddenly, some material in flames fell to the bottom, about middle light left of the car. I tried to put out the flames with the extinguisher, but other burning material fell. Other people had stopped and helped me. We pushed the car a little ahead - though the hand brake was tied and the gear shift on "P", but burning material fell again. In the meantime, my wife and children throw out the luggage, so that we could save almost all of it. But the car burned entirely. What could be the reason of this incident ? thanks god, I stopped immediately so that nobody was injured nor burned and no third party suffered any damage.

- Santiago De Chile, 00, USA

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