Question about 2005 Chevrolet TrailBlazer

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Engine Coolant sensor

I would like to know where the engine coolant sensor is located on a 4.2 engine on a Chevy Trailblazer

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  • Anonymous Oct 01, 2008

    i need to replace & cant find a diagram to find the part

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Driver side engine block behind the alternator.You need to remove the alternator to get to the sensor.

Posted on Dec 09, 2008

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SOURCE: replace engine coolant sensor in '04 Trailblazer

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a1187

Posted on Dec 04, 2008

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2 Answers

We're is the coolant temperature sense located on a 2008 trailblazer lt


Hi Janice , Before I say where the coolant temp. sensor is I'd just like to make you aware of a couple of thing's before you replace this sensor needlessly .It's one thing if you have a DTC diagnostic trouble code for the sensor but another if your temp. gauge isn't work ! You see the coolant temp. sensor is an input to the engine computer , not directly to the temp. gauge.
The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the engine coolant temperature. The engine coolant temperature gage defaults to 100°F (40°C) or below if: ?€¢
The ECM detects a malfunction in the engine coolant temperature sensor circuit.


?€¢
The IPC detects a loss of serial data communications with the ECM.

Jan 01, 2016 | 2008 Chevrolet TrailBlazer LT

3 Answers

2006 Chevy Trail Blazer 4.2 liter. Where is the coolant temp sensor located?


Since its an 06, its located rear right side upper end of engine...if it was an 05 or older , its located right above the thermostat housing...I said the later because you will sometimes have the correct model year but the manufacture put in a previous model years engine depending on actual build date...
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May 17, 2015 | 2006 Chevrolet Trailblazer

1 Answer

Loation of a coolant temperature sensor on a 1989 F250 351W


COOLANT TEMPERATURE SENSOR

1989 Ford Truck F250 3/4 ton P/U 2WD 5.8L FI Windsor 8cyl

The Coolant Temperature Sensor is located: Under hood, driver side, upper engine area, rear of water outlet, mounted in intake manifold

Feb 12, 2013 | 2003 Chevrolet TrailBlazer

1 Answer

2003 Chevy Malibu where is the coolant temperature switch


2.2L (L61) Engine
The Engine Coolant Temperature (ECT) sensor is located just to the left of the exhaust manifold in the thermostat housing between the two coolant pipes.

3.5L (LZ4) & 3.9L (LZ9) Engine
The Engine Coolant Temperature (ECT) sensor is located on the left cylinder head at the rear. It is just above the transaxle mounting bolts.

Hope helps (remember to rate and comment this answer).

Sep 19, 2011 | 2003 Chevrolet Malibu

1 Answer

I need to replace the coolant sensor on my 04 trailblazer. Exactly where is it located?


THE ENGINE COOLANT SENSOR LOCATED ON TOP FRONT OF THE ENGINE CYLINDER HEAD.THE SENSOR MADE OF BRASS.CANT MISS IT.

Sep 03, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

I have a 05 chevy trailblazer, the check engine lite is on and a hand held analyzer indicated problem codes: PO410 $ PO128 any ideas? Wayne C


P0410

Definition
Secondary Air Injection System fault
Explanation
The air injection system is monitored for faults
Probable Causes
1) Circuit relay defective or fuse open
2) Check connector and wiring
3) AIR pump defective or hoses blocked


P0128
Fault Code Definition
  • Engine temperature has not increased and/or reached the correct level within a specified amount of time after engine startup
Common Problems That Trigger the P0128 Code
As for the po128 I would replace the thermostat first. That is the problem 99% of the time.

Good Luck

Jul 12, 2010 | Chevrolet Chevy Cars & Trucks

2 Answers

Where is the coolent control sensor located on a 2002 LT trailblazer


2.2L & 2.4L Engines
  1. Turn OFF the ignition.
  2. Drain the coolant system to below the ECT sensor.
  3. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
  4. Carefully remove the ECT sensor.
  5. Installation is the reverse of the removal procedure. Coat sensor threads with thread lock sealant and tighten sensor to 89 inch lbs. (10 Nm).
It looks like this:

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Typically screwed into a coolant passage in the intake manifold or the thermostat housing.

Nov 13, 2009 | 2002 Chevrolet TrailBlazer

1 Answer

Where is the engine coolant temperature sensor located 2003 chevy trailblazer


ON the passenger side of the engine, in the head above the exhaust manifold in the very back of the engine. Hard to see and hard to get to. Pull the air filter top cover and the pipe that goes to the big box on top of the engine, then pull the big box off of the engine then you'll be able to see it alittle.

Oct 20, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

Coolant fan temp sensor location on a 2003 chevy venture


located in thermostat housing or in intake nearby (where top hose connects from radiator to engine)

Jul 13, 2009 | 1997 Chevrolet Venture

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