Question about 2006 Chevrolet Trailblazer

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I have a 2006 Chevy trailblazer the check engine light has been on since I have owned roughly 3 years but now sometimes stars flashing then stops after a while also running rough

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  • Chevrolet Master
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Engine misfire ! Flashing check engine light , catayltic converter damaging misfire . Been on for three years ? No inspection were you live ? Flashing check engine light CarMD

Posted on Dec 29, 2016

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SOURCE: check engine light is on, motor runs rough, sometimes stalls

Go to Advance or Auto Zone and have them run an obd scan on it and it will pin point why your light is on and could solve your problem. This is often done for free.

Posted on Apr 12, 2009

  • 1 Answer

SOURCE: Rough idle

I had the same exact problem on my 2004 Colorado (3.5L). Cleaned the MAF sensor (with MAF sensor cleaner) and throttle body/plate - cleared it right up.

Posted on Aug 24, 2009

  • 25 Answers

SOURCE: I own a 2002 Chevy Trailblazer with 4200 vortec

Do you know if the plugs were changed, a bad or broken plug will also cause rough idle and slow acceleration?

Posted on Oct 21, 2009

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SOURCE: Check engine light is flashing and car runs rough.

Its either running too rich or too lean, either way have it seen to quickly or engine damage MAY result.

Posted on May 13, 2010

jaxtraw1976
  • 2 Answers

SOURCE: 2002 chevy trailblazer has rough idle

There are numerous things that can caise a vehicle to idle rough. Could be a throttle posistioning sensor. pcv valve, dirty fuel filter, worn spark plugs and wires, possible O2 sensor. If the vehicle has not had a tune up yet, I would recomend one. Even if it doesn't fix your issue, the vehicle is ten years old and probably needs on anyways. Start there, then rule out the cheaper stuff next. pcv valve and fuel filter, inexpensive and it's probably time anyways. If you are getting an engine code, stop in to advance auto. They'll plug it in for free. If your still having problems, you may have to break down and tajke it to a mechanic to get plugged into a real diagnostics machine.(probably run you around $100)

Posted on Feb 12, 2012

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My 2004 chevy trailblazer is skipping and sputtering badly. Also, the service engine light stays on. Sometimes it is just illuminated, and sometimes it flashes. If I turn the a/c on, the engine dies. I...


When the check engine light is flashing, it indicates a serious condition. You need to have the car scanned for trouble codes and diagnosed, making guesses is going to waste money.

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MY 2002 TRAILBLAZER HAS STARTED TO RUN ROUGH ENGINE BOUNCING SLIGHTLY WHEN I STOP AND COMPRESSION IS DOWN.ENGINE LIGHT IS ON BUT SOMETIMES IT RUNS SMOOTH AND THEN GOES BACK TO RUNNING ROUGH


Have the codes read, that's the best place to start.

I am going to suspect there is a piece of trash in the EGR valve. I've had that happen before on a 4.3L Astro many years ago. Symptoms were just as you said.

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Rough idle


I had the same exact problem on my 2004 Colorado (3.5L). Cleaned the MAF sensor (with MAF sensor cleaner) and throttle body/plate - cleared it right up.

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Check engine light is on, motor runs rough, sometimes stalls


Go to Advance or Auto Zone and have them run an obd scan on it and it will pin point why your light is on and could solve your problem. This is often done for free.

Apr 12, 2009 | 1998 Chevrolet Tahoe

2 Answers

2002 chevy trailblazer has rough idle


it could be an o2 sensor. it could also just need a tune up

Mar 15, 2009 | 2002 Chevrolet TrailBlazer

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