my 2003 Trail Blazer Heating up !!!

[Charly]

Hello Guys,

Im new to this forum been introduced by MAY03LT i think you all know him,anyway my TB is heating up ONLY and i repeat ONLY while driving uphill,my fan is working good also my radiator has no leaks and its filled with antigel.
any help will be highly appreciated, thank u all in advance.

 

[MacMan]

Have you taken a water hose and cleaned the radiator from the back to see if it's dirty?

 

[The_Roadie]

1) What year and mileage?

2) Any other maintenance history?

3) How are you sure the fan clutch is working properly? Do you have a san tool that can display commanded fan RPM and actual fan RPM?

4) What is the exact driving conditions that give you the problem. Ambient air temp? Road speed. Engine RPM. Temp gauge reading or scan gauge data from the ECT?

5) The only antigel I located in a Google search is a diesel fuel additive. Surely you don't have THAT in a well-running radiator? What is the antigel you used and why?

 

[Charly]

Its a 2003 trailblazer LS I6-4.2 4x4
has done about 80000 miles
no maintenance issues till now
the fan clutch was tested by a local mechanic who said that it is working good
it only heats up while driving uphill,reading the temperature from the gauge it come just shy of 260 !!
and antigel is an alternative name for dex-cool in this part of the world.

 

[Denali n DOO]

Its a 2003 trailblazer LS I6-4.2 4x4
has done about 80000 miles
no maintenance issues till now
the fan clutch was tested by a local mechanic who said that it is working good
it only heats up while driving uphill,reading the temperature from the gauge it come just shy of 260 !!
and antigel is an alternative name for dex-cool in this part of the world.

Sorry, not related to your issue but I'm curious, Lebanon Indiana USA, Lebanon Ontario Canada or the real Lebanon Middle East?

 

[The_Roadie]

I can confirm it's the sovereign country of Lebanon.

This site and trailvoy before it had a long history of members who received incompetent (in some cases criminally incompetent) advice from local mechanics. If your mechanic did not use a GM Tech II tool, or equivalent high end tool, he could not POSSIBLY confirm the fan clutch was operational.

Ask him. 260 degrees is totally unacceptable. Your radiator may be clogged and need cleaning, or the fan clutch is not working well. And you didn't answer what the environmental conditions were during the overheating.

 

[Charly]

hey there, I am from the country Lebanon in the middle east !!

no matter what the weather is, cold or hot it heats up pretty good.

thank u all for ur help Ill try to take it to a certified GM mechanic and see what happens

another thing happened today,when i turned the A/C to the front vents I can here a sound like the air is escaping inside the dashboard , i read something about resetting an actuator or removing Battery terminals for a while to reset the computer !!! any suggestions !!

 

[Denali n DOO]

hey there, I am from the country Lebanon in the middle east !!

no matter what the weather is, cold or hot it heats up pretty good.

thank u all for ur help Ill try to take it to a certified GM mechanic and see what happens

another thing happened today,when i turned the A/C to the front vents I can here a sound like the air is escaping inside the dashboard , i read something about resetting an actuator or removing Battery terminals for a while to reset the computer !!! any suggestions !!

Oh that's the real Lebanon! My good friend Bassam comes from Lebanon, born and raised in Rahbe, Akkar and spent some time in Tripoli as well. He is the only person I know that had a car accident with a tank, the tank track peeled the side of the car off from front to back. He was lucky because the trunk was full of hand grenades, Molotov cocktails, AK47's and M16's.

I hope you get your temp issues solved!