Question about 2003 Chevrolet Trailblazer Ext

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Need instructions on replacing thermostat on a 2003 trailblazer

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The best i can do for you is to tell you to purchase a haynes repair manual at a local auto parts store. about 17$. it'll give you exact instructions.

Posted on Jul 01, 2009

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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
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How much does it cost to replace it


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What are the torque specs for a 2003 Chevrolet trailblazer thermostat housing?


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Replaced thermostat now ac wont work 2003 trailblazer heat stays on


The thermostat is under the alternator. Remove Neg. battery cable, positive cable from alternator. Remove Alternator, drain radiat
if it can't help you i think you should buy a diagnostic tool and make a diagnostic by yourself or you can do it in a garage. there are a lot of good tools here: chinasinoy.com
hope it can help you!
cheer!

Nov 04, 2012 | 2003 Chevrolet TrailBlazer

1 Answer

Where is the thermostat on a 2003 Trailblazer LTZ with an inline 6


it is located on drivers side of engine,below alternator the housing is held on by two ten mm bolts. i go thru the wheel well opening to replace with truck in air on lift if this is not option may need to remove alternator to gain access

Dec 23, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

2003 trailblazer overheating while @ idle


Check the wiring and connections on the coolant temperature sensor that I believe is on the thermostat housing. If they look good, replace the sensor. It is pretty rare to have an electric cooling fan motor fail but not impossible. They are usually very expensive. Expensive enough that you will want to make sure that is the problem before you replace it. Usually the sensor will fail. **Please rate me on this answer.**

Jun 24, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

Replacing a 2003 chevy trail blazer thermostat


if this is on a 5.3l the thermostat is on the lower hose. you will probably need to remove both belts, and possible the tensioner for the ac belt to get good access.

Dec 19, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

I need to replace the thermostat on my 2003 Trailblazer


Most if not all repair manuals for vehicles these days covers replacing the thermostat. Your best solution is to puchase one of these manuals for your vehicle from the local automotive supply store (autozone, petboys.. )

Now while i don't know your particular vehicle, i can make the safe assumption that you will need to remove the pump (or housing on the pump) to swap out the thermostat. Mostly this involves removing the housing bolts, and simlpy removing the outlet block, and replace the thermostat / gasket (if required) and replace everything.. .

again, this is not a howto guide, just from recollection. Your best, and safest bet is to get the manual, and follow it. They are usually pretty easy to replace inless you have one of those foriegn jobbies..

May 29, 2009 | 2003 Chevrolet Trailblazer Ext

2 Answers

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.

Jan 28, 2009 | 2003 Chevrolet TrailBlazer

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