Question about 2003 Chevrolet Trailblazer Ext

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Wireing diagram for 2003 trailblazer ext 4.2 coolent temp sensor

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The coolant temp sender only has 2 wires which can usually be hooked up either way

Posted on Nov 12, 2010

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How do you fix a code#P0125 on a 1998 toyota 4 runner?insufficient coolent temp. for closed loop control?


first check radiator level if it is full and the heater is working good make sure temp gauge is functioning c orrectly it is most likely the coolant temp sensor but if this is a high milage vehicle and you have owned long time and never changed i would also replace thermostat and check plug to temp sensor forr good conections and good wires

Apr 01, 2012 | 1998 Toyota 4Runner

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Where is the ouyside temp. sensor, & is it easy to


The ambient air temp sensor is mounted on the top radiator support bracket, at about center position, on the underside of the bracket. It is easy to get to. Below is a diagram looking toward front, sensor is item 1.

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Aug 30, 2011 | 2002 Chevrolet Trailblazer Ext

1 Answer

I need an emissions diagram for a 2003 trailblazer ext lt. I have a vaccuum leak, I know wair it is, but I need to know part names, locations, and part numbers. All which should be on a diagram. Please...


I am not aware of an emissions diagram, but you might find what you need at www.compnine.com. There exploded diagrams of various sections of the Trailblazer as well as parts lists.

Jul 11, 2011 | 2003 Chevrolet Trailblazer Ext

1 Answer

Locate 2003 Chevy trailblazer crankshaft position sensor


The Crankshaft position sensor is located on the left rear of the engine block below the starter. it has an oval connector and is held in place by one bolt. See picture of sensor below (some models has a 45 degree connector, most are straight like the one pictured below.



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Apr 07, 2011 | 2003 Chevrolet Trailblazer Ext

1 Answer

Any tips on removing the rotors on a 2003 Chevy Trailblazer EXT?


Jack handle across the four lug nut stubs and wedge in place, or have someone hold it/stand on it.

Use a breaker bar or socket with a long extension to undo the four bolts holding the rotor to the hub. Clean up the hub face when you have them off with a wire brush, so the new ones sit properly.

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Jun 25, 2010 | 2003 Chevrolet Trailblazer Ext

1 Answer

Check engine light on....cooling fan over speeds. I replaced the fan clutch and still does the samething...a lot of air noise...specially when starting out / accelerating


Check engine light is part of the solution as the code stored may indicate the malfunctioning sensor.The fan overspeed is a computer generated safety backup for electric fan clutch engagement so the engine don't overheat when the coolant temp sensor malfunctions.

Apr 18, 2010 | 2003 Chevrolet Trailblazer Ext

1 Answer

Need repair and parts diagrams- trying to clearly identify my SUV 2005 Trailblazer EXT why 2 wheelbases? what is difference between submodel LS or LT>


THE LS AND LT are just mainly interior styles lether vs cloth thingsd like that. the trailblazer ext is the longer wheel base model due to it has a third seat and a regular trailblazer does not. ext stands for extended

Apr 07, 2010 | 2005 Chevrolet Trailblazer Ext

1 Answer

Ext tempeture on a/c display show exterior tempeture at 50 degree;s but it is in the 90's


in the grill area is a sensor it is very comon for the sensor to go bad ,check it to make sure it is clean of debrie (bugs) un plug the sensor see if the temp changes if it does thats most likly your problem, you can test the sensor with a ohm meter by warming it up while reading the resistance

Jun 12, 2009 | 2003 Chevrolet TrailBlazer

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