Four problems related to service engine light on have been reported for the 2003 Chevrolet Trailblazer. The most recently reported issues are listed below.
I purchased a 2003 chevy Trailblazer ext in June,2007. In Jan of 2009 my problem first began. While driving normal speed, the service engine light sometimes comes on immediately followed by the "reduced engine power". When this happens, the car immediately loses power and the vehicles only goes around 10mph. You never know when it is going to happen. It can happen several times in a day or not at all. It is very dangerous when it happens because you can sometimes stop the traffic flow. The light will come off and the vehicle will return to normal speed if you stop the car and then restart it. It happens particularly when it is cold outside. In the morning it can happen 15-20 times before I get to work, and then in the afternoon only once or twice. I have taken it to several auto repair shops and no one seems to be able to fix it. They recommend one thing, I pay for it and then it happens again. I have had my clutch replaced and also the accelerator pedal system. I researched "chevy reduced engine power" on the internet and there are a great amount of pages of people experiencing this same problem. It appears to happen to chevy suvs, in particular the Trailblazer. I don't understand how so many people can experience this same problem and there not be a recall. I have taken it to 2 chevy dealers and they don't even know what to do. I paid $18k for this vehicle in June, 2007 - I put $5k down and still owe about $10k. Chevy needs to recognize this problem and correct it. The vehicle is virtually undrivable and unsafe.
2003 chevy Trailblazer with 34100 miles service engines light comes on, I take it to the dealer who fixes it and recommend I have the transmission and another regular maintenance completed that cost me over 400. 00 dollars. Two weeks later I have to take it back becasue the speedometer went past 115 miles while sitting still, a week later the transmission starts stalling while going forward and the engine fan is running constantly even on start up. Checked the fluid I had none in the transmission. Yet it was suppose to have been filled when maintenance was done. Took it back to the dealer it is no longer under warranty and just under a hundred miles later my 2003 chevy Trailblazer which is 3 years old. There is a problem with the transmission in the chevy Trailblazer and I am not the only one experiencing this. Something needs to be done. Help.
I have a 03 tb 2wd I have noticed recently that it is not changing gears properly. The service engine light came on and the problem appeared three more times. Then the light went off and the problem went away. I took it to the dealer and they hooked it up to the "machine" and all they could find wrong was my O2 sensor. They said I needed to replace the gas sensor. This has nothing to do with the transmission. (this is what they said) they told me that they were not worried about it. I told them I was about to drive the car on a trip 1,000 miles one way. No problems they said. I called and questioned the dealership and he acted very surprised by this. Says he hasn't seen a "problem" with the transmission. One of my CO-workers daughter also has a Trailblazer and hers has started to act up as well, and guess what it is the same thing as mine. I went on this web site and found out that this is a common problem with the tb. . Read more...
While traveling the service engine light illuminated, and vehicle experienced sudden deceleration. Vehicle was taken to a dealer, who could not determine the cause of problem.