Question about 2003 Chevrolet TrailBlazer

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2003 Chevy Trail blazer says service engin soon?

I have a lighted Message "service engin soon" all my flids are ok, 2003 Chevy trailblazer. Has 112,000 miles +

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  • Anonymous Mar 12, 2014

    service engine soon light came on, code read po147, reset light and service engine light stayed off, is it ok

  • Anonymous Mar 23, 2014

    2003 trailblazer running well now all sudden service engine soon light on and flashes upon acceleration

  • Anonymous Mar 24, 2014

    Service engine soon light on machine said because small gas leak

  • Anonymous Mar 29, 2014

    service brakes soon diplaylight



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You have a trouble code stored. This means the pcm has detected a problem somewhere

Posted on Aug 25, 2008


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Posted on Jan 02, 2017


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Abslight stays on. How to fix? This is a2007trailblazer?

First you need to have EBCM - electronic brake control module check for DTC'S - diagnostic trouble code's . If the light is on there is a code stored . I think most part stores can do this and for free . After you find out what code is stored , looking up that code in service repair information for diagnostic trouble shooting chart would be next step . There are a few codes too.
DTC C0035 or C0040
DTC C0045 or C0050
DTC C0110
DTC C0131
DTC C0161
DTC C0186
DTC C0196
DTC C0201
DTC C0240
DTC C0241 or P0856
DTC C0244 or P1689
DTC C0245
DTC C0283
DTC C0287
DTC C0290 or C0292
DTC C0455
DTC C0550
DTC C0558

Find the code do the diagnostic's , fix the problem , wiring issue's , a sensor , bad module ,what ever it is . The light will go out then . Here is a sample of code discription .
• DTC C0035 Left Front Wheel Speed Sensor Circuit
• DTC C0040 Right Front Wheel Speed Sensor Circuit

Dec 30, 2016 | 2007 Chevrolet Trailblazer

1 Answer

2003 chevy trailblazer service engine soon light

If the service engine soon light is flashing, it means the computer has detected an engine misfire with the potential of catalytic convertor failure. Don't just tune it up. Bring it somewhere they can read the trouble code. Sometimes it will designate which cylinder is having the problem.

Sep 24, 2014 | 2003 Chevrolet TrailBlazer

2 Answers

Co237 and co267 for 2003 chevy trail blazer

C0237 is related to the rear speed sensor and C0267 is related to the pump motor in the ABS system.

Feb 15, 2014 | 2003 Chevrolet TrailBlazer

1 Answer

How do i reset the service engine soon light on my 2004 chevy trailblazer

You will need a code reader to clear the service engine soon light. If you have not repaired the problem the light will come back on.

Mar 19, 2013 | 2002 Chevrolet TrailBlazer

1 Answer

My 2004 Trail Blazer is sputtering never had this problem before

Those check lights have been on all vehicles for
31 years now

Did you not check for codes?

Diagnose & resolve code related issues first

Aug 29, 2012 | 2004 Chevrolet TrailBlazer

1 Answer

I have a 2003 Chevy trailblazer,when I accelarate my service engine soon light came then the reduce engine light comes on; suddenly my truck slows down. Shut the engine down, start it back, the lights go...

Get the engine codes pulled. Once you have them it will help track down the issue. Not really much you can do otherwise unless you want to throw money at it.

Jan 17, 2011 | Chevrolet TrailBlazer EXT Cars & Trucks

1 Answer

2003 Chevy Trail Blazer Top brake light works along with turn signals, but no brake lights

It is the turn signal switch. You must remove the air bag and pull the steering wheel. Special tools are required and the airbag can cause serious injury if mishandled.

Oct 01, 2010 | 2003 Chevrolet TrailBlazer

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