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Problem in emission system-- Have vehicle scanned to determine the problem

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Q: Why is my 2004 trailblazer check engine light lit at 30000 miles?
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How do you check for check engine light codes for a 2005 Chevrolet trailblazer?

With a scan tool.


Will the headlights cause check engine light to come on in 2003 trailblazer?

No


What do you do if the check engine light comes back on after replacing the speed sensor?

I had all sensors replaced in my 03 Trailblazer and the check engine light stiil comes on. Why?


How to reset check engine light on 2004 trailblazer?

There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.


Check engine light is on engine bogs down 2002 Chevy trailblazer?

There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.


What does the check engine light look like on a 2005 trailblazer?

In US it says "SERVICE ENGINE SOON" in Canada it looks like an engine.


Chevy Trailblazer check engine light?

The check engine light sets a code for diagnostics and you need a code reader. Most auto parts stores sell code readers and most will check the codes for free.


How do you reset service engine soon light on 2003 Chevy trailblazer?

How do I reset the service engine light on a 2003 Chevy Trailblazer?


Why does the check gage light come on and your trailblazer shuts off?

There are many reasons why a check engine light could come on and shut a Trailblazer off. It could be the fuel pump or the oil pump. A mechanic will be able to run diagnostic tests to figure out the problem.


Check valve causing check engine light to come on 2005 Trailblazer?

I think you are talking about the secondary air check valve. Come to our enthusiasts forum and post your question there with the trouble code (Pxxxx) www.trailvoy.com All the Answers for your Trailblazer


How do you reset check engine light soon on 2003 Chevy trailblazer?

If you don't have a code reader you can disconnect the battery cable for a couple of minutes and that will reset the light


What does diagnostic code 410 mean for the check engine light on a 2004 trailblazer?

The diagnostic code 410, on your 2004 Chevrolet trailblazer, is a reference to a vacuum hose problem. Check the vacuum hoses to make sure they are all connected.