Question about 2002 Chevrolet TrailBlazer

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Check engine light on

Check engine light is on. On my 2002 trailblazer. Also when air conditioner is on and ideling the engine wants to shut off.

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I would think there is a problem with a sensor which my be an IAC Sensor. That makes the idle air control Hi or lo depending on what the motor is calling for. Have a shop take a computer reading and see what sensor is bad, As for the air There is a Air condition Amplifier and there may be a problem with that its not common but sounds like it may be the problem with your trailblazer. I sure hopes you out Flash68, If not get back to me and we can trouble shoot some more. Take care Bear001

Posted on Jun 24, 2008

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What is ideler pully 2005 trailblazer


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What's the problem?

You make it sound like you never need a technican
or skilled mechanic to diagnose any vehicle,sorry,they
are very high tech & beyond the driveway fix, of thirty
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You have a check light on
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Hello When i start the truck the engine races like someone is holding down the gas pedal and the transmission will not go into gear.


Is there any check engine lights on?The idel air control has most likely quit,and it quit while it was open.Remove it and see if the valve is stopped up,if not replace it.Be sure to make sure the throttle is not ****,and is all the way down at idel position.I hope this is somewhat helpfull.

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It could be other things also but this is where I would start.

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