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Dex cool vs Anti freeze (green)

This is a discussion on Dex cool vs Anti freeze (green) within the GM Trucks forums, part of the Vehicle Specific category; I just picked up my 2000 yukon, it has the 5.7 vortec in it. So as i do with all ...

  1. #1
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    2001 Trans AM

    Dex cool vs Anti freeze (green)

    I just picked up my 2000 yukon, it has the 5.7 vortec in it. So as i do with all used vehicles i did all of the regular tune up stuff. when i got to checking the coolant it had green anti freeze instead of dexcool. I have heard horror stories about this, what do i do from here? The coolant overflow tank needed topped off so i did it with regular green anti freeze, figuring that is what is in it now so it cant do any more harm.

    Thanks for the help.

    Joe

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    Member hoss 2000 z-28's Avatar
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    Monterey Maroon Metalic
    2000 Z28

    Dexcool (orange) from what I've been told can gum up and cause big problems if it's not flushed and replaced with universal pre-mixed. The previous owner saved you the trouble and switched over. I think your Yukon is in good shape.

    When I bought my Z used at 50K the orange stuff was in it and there was a coating of it sticking to everything! I thought it had ruined the radiator, etc. but after the forced flush it cleaned up really well. Got lucky, I've heard some horror stories.

  3. #3
    Member Nitrous's Avatar
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    White
    97 GMC with 02 LS6 engine

    There's nothing wrong with the green anti-freeze or Dex Cool. I've ran both for years and actually had more problems with the green probably due to contaminated water. I've run 100% Dex-Cool in all my vehicles for the last 15 years with no issues at all. I think it's moreless a preference of the two.

    Dex-Cool (ethylene glycol) is identical to the Chrysler & General Motors factory fill. Havoline had the original patent on Dex-Cool and manufactures it for GM. The benefits of Dex-Cool are:

    Lower alkalinity
    Contains NO silicates, resulting in longer lasting water pump and engine seals; longer shelf life.
    It is Nitrite-, borate-, phosphate-, nitrate- and amine-free.
    100% biodegradable in its pure unused condition.
    Longer lasting (Dex-Cool has been shown to remain above 95% of its original concentration after 150,000 miles in automobiles)

    Here's a good article to read if have a little time.

    http://www.imcool.com/articles/antif...l-macs2001.php

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    Thanks a lot nitrous that article was exactly what i needed, that should be a sticky on this site. I have read a lot of different things but that seems to clear it up.

    Thanks again

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    dex-cool is crap i use the green with distiled water 50/50

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    Member 2-bowties&abird's Avatar
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    cam/lt headers
    blue 2000 ws6 m6

    just dont mix them together.

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