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Transmission Cooler

isis

By isis
in Ask A GM Technician

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isis New Member

isis

Posted
Posted

I have 2001 gmc sierra c3 with a 6.0 liter.I noticed the overflow reservior had transmission fluid in it.I don't have any coolant in the transmission but transmission fluid in the coolant.I pretty sure it is transmisson fluid because it is redish color. Is this a common problem in this vehicle? I will send a picture of the coolant color shorty?Any suggestion i would appreicate.

grampadirt Senior Enthusiast

grampadirt

Posted
Posted
I have 2001 gmc sierra c3 with a 6.0 liter.I noticed the overflow reservior had transmission fluid in it.I don't have any coolant in the transmission but transmission fluid in the coolant.I pretty sure it is transmisson fluid because it is redish color. Is this a common problem in this vehicle? I will send a picture of the coolant color shorty?Any suggestion i would appreicate.

 

 

If what you see in the recovery tank is red,fear not.GM uses red colored coolant in their vehicles.I've heard good and bad things about this stuff....look into it more.But keep an eye on the tranny dipstick just to be sure.I can't recall ever hearing of the cooling tube leaking inside of the radiator.

zaac Enthusiast

zaac

Posted
Posted
I have 2001 gmc sierra c3 with a 6.0 liter.I noticed the overflow reservior had transmission fluid in it.I don't have any coolant in the transmission but transmission fluid in the coolant.I pretty sure it is transmisson fluid because it is redish color. Is this a common problem in this vehicle? I will send a picture of the coolant color shorty?Any suggestion i would appreicate.

 

 

If what you see in the recovery tank is red,fear not.GM uses red colored coolant in their vehicles.I've heard good and bad things about this stuff....look into it more.But keep an eye on the tranny dipstick just to be sure.I can't recall ever hearing of the cooling tube leaking inside of the radiator.

 

Did they use red in '01? My '00 is green. If it's tranny fluid in the tank it won't mix but will float on top.

98silvz71 Enthusiast

98silvz71

Posted
Posted
I have 2001 gmc sierra c3 with a 6.0 liter.I noticed the overflow reservior had transmission fluid in it.I don't have any coolant in the transmission but transmission fluid in the coolant.I pretty sure it is transmisson fluid because it is redish color. Is this a common problem in this vehicle? I will send a picture of the coolant color shorty?Any suggestion i would appreicate.

 

 

If what you see in the recovery tank is red,fear not.GM uses red colored coolant in their vehicles.I've heard good and bad things about this stuff....look into it more.But keep an eye on the tranny dipstick just to be sure.I can't recall ever hearing of the cooling tube leaking inside of the radiator.

 

Did they use red in '01? My '00 is green. If it's tranny fluid in the tank it won't mix but will float on top.

 

 

If it was green then someone else replaced it. GM started using the orangeish/redish Dex-Cool Coolant in the 400 series trucks (at least the 96-98s).

 

There is some easy advice in bold. ^

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
I have 2001 gmc sierra c3 with a 6.0 liter.I noticed the overflow reservior had transmission fluid in it.I don't have any coolant in the transmission but transmission fluid in the coolant.I pretty sure it is transmisson fluid because it is redish color. Is this a common problem in this vehicle? I will send a picture of the coolant color shorty?Any suggestion i would appreicate.

 

 

If what you see in the recovery tank is red,fear not.GM uses red colored coolant in their vehicles.I've heard good and bad things about this stuff....look into it more.But keep an eye on the tranny dipstick just to be sure.I can't recall ever hearing of the cooling tube leaking inside of the radiator.

 

Did they use red in '01? My '00 is green. If it's tranny fluid in the tank it won't mix but will float on top.

 

 

If it was green then someone else replaced it. GM started using the orangeish/redish Dex-Cool Coolant in the 400 series trucks (at least the 96-98s).

 

There is some easy advice in bold. ^

 

 

Yep, my 2000 had the red Dexcool in it.

zaac Enthusiast

zaac

Posted
Posted
Yep, my 2000 had the red Dexcool in it.

Sorry guys, mine is red too. Quite often I don't know what I'm talking about. :crackup:

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