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.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety. Notes: It would be ill-advised to blaze any trails with the 2004 Trailblazer. Its faulty fuel gauge could leave you stranded.


really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
47,000 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 drivetrain problems

drivetrain problem

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2004 Chevrolet Trailblazer Owner Comments

problem #3

Dec 182007

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 45,000 miles


The failure involves the electro-mechanical device that shifts the car into four-wheel drive. The four-wheel is engaged by selecting 4WD with a dashboard selector switch. The switch will show a lighted indicator moving from 2wd to the 4WD. This indication is faulty. While driving towards a snow covered mountain road with several sharp turns going up the mountain the vehicles selector switch was moved to the 4WD position and the indicator light shown it was engage in the 4WD mode. However the indication was faulty and the vehicle was actually only in 2wd. The selector switch engages an actuator that causes a fork to move the gears in the front transfer case into or out of 4WD. The result of the false indication of the vehicle being in 4WD when it was actually in 2wd cause the rear of the vehicle to break traction and the entire vehicle to start into a spin which resulted in the vehicle leaving the road and damage to the front end of the vehicle. The main problem is that the vehicle gave a false indication of being in 4WD when it was actually in 2wd.

- Fleming, PA, USA

problem #2

Apr 162007

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 60,000 miles
I have a 2004 Trailblazer. I had taken it to the dealership service center on several occasions because of issues with it. The service engine light came on all the time. It would rev up the rpms for no reason and make a weird sound. It would not go into 4 -wheel drive or out of it like it is supposed to. And other things. I had it checked, and they said it was all fine and they couldnt duplicate the errors. However, subsequently, the transmission has gone out 4 times in the last 4 months. I have had it replaced 3 times. It is now at the transmission shop and they state that there is a problem with the engine has too much travel to it front to rear. The crank shaft specifically which is allowing the torque converter to pull away from the front pump and break the rotar assembly in the front pump of the transmission. This is getting expensive and frustrating. Are there any other people who have the same issues or is there an issue with the crank shaft" could it be the transmission is built wrong" this is rediculous!! I have only 70,000 miles on it. Why would I buy Chevy products if they continue to fail at such low miles.

- West Valley, UT, USA

problem #1

Sep 052006

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 36,000 miles
I have had my trail Blazer for 1 yr and 1 month. In that time I have had to replace front and back pads and rotors, ball joints, catalytic (sp) converter, and now they just told me I have to replace the head gasket on the manifold. What the hell is going on with this vehicle. I no longer feel safe driving it. The other day the radio just stopped playing and then the service 4 wheel drive light came on.

- Oostburg, WI, USA

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