Trailblazer '03 Over heating - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



Welcome Enthusiast! If you already own a Chevy TrailBlazer or GMC Envoy or perhaps thinking of purchasing such a vehicle, then you have come to the best TrailBlazer and Envoy site on the net! Rainier, Bravada, Ascender, and 9-7x owners welcome too!

You are currently viewing our site as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to search and post topics, communicate privately with other members, respond to polls, upload content, and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.
Join Today!
Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2006 - 2009 TrailBlazer SS Tech > 06-09 SS Engine and Drivetrain > Engine Tunes/Mods

Engine Tunes/Mods Engine tuning and/or modifications

TrailVoy.com is the premier GMC Envoy Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools
  #1  
Old 07-24-2012, 06:00 PM
shahryar2002 shahryar2002 is offline
Junior Member
 
2003 Chevy TrailBlazer LT
Black 4.2L I6 2WD
Join Date: Feb 2012
Location: Saudi Arabia
Posts: 2
Exclamation Trailblazer '03 Over heating

Dear All,

I am having chevy trailblazer'03, for the last few days I am having engine over heating problems while running with AC in the day timing. And even in night the temp needle goes a bit on right.

Since I am living in Arab, so obviously the day is quiet hot, but I remember my engine used to be working normal previously.

My only doubt was about radiator flushing, and I have already got this done, but this shows no change.

Right now I am considering two options, first or most likely is Fan Clutch or the second one is thermostat.

Can you guys suggest me, what should I do to troubleshoot my thermostat or fan clutch.

One important thing, I am not having any engine check light.

So please give out your suggestion.

Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 07-25-2012, 12:05 AM
petevw's Avatar
petevw petevw is offline
TrailVoy Alumni
 
2002 Chevy TrailBlazer LTZ
Red Jewel Tintcoat 4.2L I6 4X4
Join Date: May 2007
Location: Ulster County, New York
Posts: 3,250
Have you had the radiator washed with a spray hose from the back? Could it be plugged with sand / dirt?
__________________
Always remember: wherever you go, there you are!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

PCM4less,HID,DRL killer,cabin air filter,Mobil 1,K&N,LED's,230K+,
Reply With Quote Quick reply to this message
  #3  
Old 07-25-2012, 02:00 AM
wcosh's Avatar
wcosh wcosh is offline
New Member
 
2003 Chevy TrailBlazer LT EXT
Dark Green Metallic 4.2L I6 4X4
Join Date: Aug 2009
Location: Vancouver BC
Posts: 331
Search
Fan Clutch Diagnostic

there is a good write up on testing the operation of the fan clutch.

If you still have the orig fan clutch then you are much overdue for a new one.
At the same time you should go in with a new water pump and upper-lower hoses. Then change the thermostat
Reply With Quote Quick reply to this message
 
  #4  
Old 07-25-2012, 04:31 AM
shahryar2002 shahryar2002 is offline
Junior Member
 
2003 Chevy TrailBlazer LT
Black 4.2L I6 2WD
Join Date: Feb 2012
Location: Saudi Arabia
Posts: 2
Thermostat Diagonose

Is there anyway to diagnose the thermostat??

I will do the fan clutch diagnose today and will post the results at night.
Reply With Quote Quick reply to this message
  #5  
Old 07-25-2012, 11:13 AM
ylab's Avatar
ylab ylab is offline
TrailVoy Alumni
 
2002 GMC Envoy SLT
Summit White 4.2L I6 4X4
Join Date: Jul 2005
Location: Stratford, NJ
Posts: 3,203
Short of removing the stat and dipping it into hot water to see at what temperature it opens, you can only guess. Without removing the stat, you can use a temperature probe (I use a IR gun) to read the temperature of the housing at the point coolant begins to flow and the hose warms. - But you can't tell if it's actually fully open, only that coolant is beginning to flow. (Not to mention the temp on the housing may not be 100% accurate to the temperature of the coolant, although using an OBDII reader to obtain the sensor's temp will get you close).

Quite frankly, if I'm removing it to test it, I might as well toss a new one on.
__________________
Borla Exhaust, CAI, e-fans, Wester's Tune, MarkMc's lift & Z71 Shocks!
Reply With Quote Quick reply to this message
  #6  
Old 07-25-2012, 11:44 AM
wcosh's Avatar
wcosh wcosh is offline
New Member
 
2003 Chevy TrailBlazer LT EXT
Dark Green Metallic 4.2L I6 4X4
Join Date: Aug 2009
Location: Vancouver BC
Posts: 331
I'm not sure what parts will cost in your end of the world, but over here in North America the cost of a thermostat is less than $30 so after 9 years....I would just change it
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Tags
overheating, thermostat, trailblazer

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum forums, you must first register.

Please enter your desired user name, your email address and other required details in the form below.
(Only letters, numbers, dashes and underscores are permitted for user names)
The user name that you choose is permanent and can never be changed.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


» Sponsors

Advertising Info

All times are GMT -4. The time now is 12:41 PM.


Chevy TrailBlazer and GMC Envoy Enthusiasts - Copyright 2004 - 2009 All Rights Reserved.
All trademarks referenced herein are property of their respective owners.
RSS Feed