Question about 2004 Chevrolet TrailBlazer

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Where does the light green sensor plug connect to?

After my mechanic worked on my engine head, my 2004 trailblazer is now running rough and hot. I found a light green 2 pin connector that is not connected to anything and hope to identify the sensor and its location. thank you for your help in advance. brawley resident

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Hello there

the cylinder head on your truck needs to be machined and if it's really bad then you need to get good cylinder head

Posted on May 11, 2014

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Posted on Jan 02, 2017

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SOURCE: Runs rough at idle and low rpm. misfires. gets better @ high rpm

sounds to me you have a emissions problem check your EGR valve and MAP senser

Posted on Jan 16, 2009

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SOURCE: 2002 chevy trailblazer has rough idle

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

Posted on Mar 15, 2009

  • 95 Answers

SOURCE: OBD II Connector identify and location?

2004 Chevy Aveo LS, the OBD-II connector is against the panel closest to the driver's knees above the brake pedal.

Posted on Jun 13, 2009

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I had the same problem change your blower motor resistor.

Posted on Aug 17, 2009

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SOURCE: Vaccum hose diagram for 97 chevy tahoe 5.7 liter

I have the diagram you need. If you send me your email I will scan it off and send it to you.

Posted on Sep 12, 2009

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2006 Chevy Trailblazer started to run rough in idle but only after it warms up. My mechanic got P0017 code on his scan tool and told me I needed to replace the Crankshaf and Camshaft sensors. Both sensors...

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I just had the head serviced and replaced ,but found a connector loose. The connector tip is light green more round than oval like the other connectors. The car starts but doesn't. Feel right I. Hav

What is the color of the wire with stripes or solid color? I have access to a wiring diagram. Sounds like a temperature sensor. This tells the ECM how much fuel to give the motor and also regulates the fan to turn on and off to keep the engine from overheating.

May 11, 2014 | 2004 Chevrolet TrailBlazer

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Can i run my 02 trailblazer without my front 02 sensor plugged in

Not if you want any type of fuel control, after you go to
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Why are you asking?

I guess you don't know what oxygen sensors are for!

Feb 11, 2013 | 2004 Chevrolet TrailBlazer

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2005 trailblazer flashing engine light

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5.3 liter Chevy engine #1 Cylinder not firing at idle

My opinion...

Year? Miles?

There's no way I'd dive into a "HEAD GASKET"
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Even if it is a "HEAD GASKET"... the entire engine
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Rough running under load both o2 sensors changed with new plugs. I think the trouble light was on too long and sum how killed the converter

did you check the coils and plug boots when you replaced the plugs? often times the coils get weak and don't complete the burn to the plugs. also check the connections at the coils to make sure no terminals got bent when you plugged them back up. the convertor can be bad or will go bad if the engine running problem isn't corrected.does the check engine fault codes reveal misfire codes or catalyst below efficiency code? the misfire codes need to be fixed first.

Aug 10, 2011 | 2004 Chevrolet TrailBlazer

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I have a 2004 chvrolet trailblazer. Since I got it when at idol it stalls. I brought it numerous times to the dealership for this. They said it was the idol. About a year ago my orange check engaine light...

Was it the hose to the throttle body that you're talking about? Or another thing that would cause it, would be the little tiny hose on the right hand side of the plastic resnonator, this goes to your fuel pressure regulator. AND the larger size hose on the bottom left front which would all cause it to run rough also. All these things would cause it to run rough and you're not the first to forget to hook those back up. Is the engine still running hot? The guage means nothing, need to have it looked at by a scanner to get true accuracy. Should be solid at 210 always.

A couple of things.....while the thermostat was replaced, did they replace the coolant temperature sensor right above the thermostat? This could cause mis readings if it's bad, mine is bad right now so I need to replace mine.

Also, when it would stall, did you have the A/C or defroster on when it did this? If so, it's a very common problem, need to clean the throttle body to get rid of this problem. If you have any more problems or anything with this vehicle, let me know, you got the right guy for Trailblazers.

Jun 01, 2011 | 2004 Chevrolet TrailBlazer

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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

1 Answer

Oil in spark plugs

Could mean a variety of things.....
Possible head gasket leak....(cheap fix if caught early)
Possible Worn piston rings
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Jan 12, 2009 | 2004 Chevrolet TrailBlazer

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