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Anonymous Posted on Jul 05, 2014
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Thermostat trailblazer Where's the thermostat

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Ryan Lutton

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  • Chevrolet Master 1,267 Answers
  • Posted on Apr 19, 2017
Ryan Lutton
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On the I6 engine, it's right below the alternator.

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Anonymous

  • 11 Answers
  • Posted on Oct 04, 2009

SOURCE: how to i change thermostat in 2005 trailblazer

The thermostat is located behind and slightly below the alternator on the drivers side. For the best access to the thermostat, you should unbolt and move the alternator to reach the upper bolt. The lower Thermostat bolt can be reached by taking off the front drivers side tire and reaching in with a 24" extension. The actual bolts are 10mm. Hope this helps...

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duane_wong

Duane Wong

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  • Posted on Feb 14, 2011

SOURCE: I had a new thermostat and thermostat sensor put

Maybe check if the fans are coming on when the car is at operating temperature. Also, may need a flush and fill of the antifreeze, since it's about 7 years old.

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0helpful
1answer

How to change a thermostat on a 2003 trailblazer
need to jack up and remove drivers side tire and using long extensions unbolt the thermostat housing from the lower side of engine or remove a few thing [alternator belt etc] and go through top its tight but the following link has video of both ways of doing replacement
How to replace thermostat 4 2 envoy or trailblazer
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Jun 05, 2017 • Cars & Trucks
0helpful
1answer

Where is the thermostat sensor located in a 2008 Chevy Trailblazer engine?
For the I6 engine, the actual thermostat is on the drivers side below the alternator. The coolant temp sensor is in a bad place. Approx 06' and up, they changed the location to the drivers side, wayyyy in the back. PITA to get to. 05' and older had it located right above the thermostat, was easy.
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Nov 07, 2016 • 2008 Chevrolet Trailblazer
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1answer

Location of 2007 chevy trailblazer thermostat
Follow the radiator hose back to the engine on the top side. Where the hose connects to the engine is the thermostat housing. Remove the hose clamp and hose (when vehicle is cool). remove the housing itself and the thermostat will be right in front of you. .
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Feb 17, 2015 • 2007 Chevrolet TrailBlazer SS
1helpful
1answer

I need the locations of thermostats
Not quite sure when you say thermostat"s". or what size engine you have but what I went on and did was give you the location of the cooling system thermostat for the most common engine for a Trailblazer for your year (4.2 liter). If this is the one, just letting you know that that thermostat comes as a complete unit water outlet and thermostat together. they don't sell it separate. Hope this is what you were looking for and I hope this helps.


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Sep 13, 2011 • 2004 Chevrolet TrailBlazer
1helpful
1answer

What could cause code PO128 to come up on a 2002 Chevy Trailblazer
Sounds like the thermostat may be stuck open or has anyone put a colder thermostat in the car,because once it starts to get cold it will throw a SES with a colder then stock thermostat.

Code PO128; coolant temp below thermostat regulating temp. Replace the thermostat and that should address your issue.

Thank you for using fixya and good uck
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Sep 01, 2010 • 2002 Chevrolet TrailBlazer
3helpful
1answer

How do you change the thermostst on 2004 L-6 trailblazer
Engine Coolant Thermostat Replacement (4.2L Engine)
Tools Required
J 38185 Hose Clamp Pliers

Removal Procedure
Remove the necessary coolant from the radiator. Refer to Cooling System Draining and Filling .
Remove the generator. Refer to Generator Replacement .



Loosen the outlet hose clamp at the thermostat housing (1). Remove the outlet hose from the thermostat housing.



Remove the thermostat housing bolts.
Remove the thermostat housing from the engine block.
Clean all of the surfaces of the thermostat housing.
Clean the sealing surface of the engine block.
Installation Procedure




Install the thermostat housing to the engine block.
Notice: Refer to Fastener Notice in the Preface section.

Install the thermostat housing bolts.
Tighten
Tighten the bolts to 10 N�m (89 lb in).

Lubricate the inner diameter of the radiator hose with engine coolant.



Install the outlet hose to the thermostat housing (1). Secure the hose with the clamp.
Install the generator. Refer to Generator Replacement .
Fill the cooling system with specified coolant and concentration. Refer to Cooling System Draining and Filling .
Inspect all sealing surfaces for leaks after starting the engine. 8387794.jpg
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Dec 22, 2009 • 2004 Chevrolet TrailBlazer
12helpful
2answers

How to i change thermostat in 2005 trailblazer
The thermostat is located behind and slightly below the alternator on the drivers side. For the best access to the thermostat, you should unbolt and move the alternator to reach the upper bolt. The lower Thermostat bolt can be reached by taking off the front drivers side tire and reaching in with a 24" extension. The actual bolts are 10mm. Hope this helps...
Read full answer
Oct 03, 2009 • 2005 Chevrolet TrailBlazer
0helpful
1answer

My 2003 chevy trailblazer keeps throwing code
change thermostat
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Jun 06, 2009 • 2003 Chevrolet TrailBlazer
1helpful
1answer

I have 2005 chevy trailblazer heater wont work,
Sounds like your water pump is going out or your thermostat is stuck. Check the thermostat first and make sure it is not frozen in the clsed position.
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Mar 10, 2009 • 2005 Chevrolet Trailblazer Ext
1helpful
2answers

P0172 and P0128 Error Code 2003 Trailblazer 4WD
PO172 means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). I would replace the thermostat first. The computer could be injecting too much fuel because it thinks it never gets to operating temperature. That may keep the light off.
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Jan 28, 2009 • 2003 Chevrolet TrailBlazer
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