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Trans Cooler?


skippy7024

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Posted

I have a 2003 GMC Sierra 2500HD. I have what appears to be an external transmission cooler in front of the radiator. I want to make sure that is what this piece is. It appears to be a factory piece. What has me being suspicious is that I do have trans lines going to my radiator. One of the lines I know for sure comes from the radiator to this cooler. I cannot tell where the other line is coming from. It definitely has transmission fluid coming from a pin hole. Is this a secondary cooler that is only on HD trucks?

Posted

It is a secondary cooler. It is found on other models as well, not just HD. Fluid travels from trans to radiator, out to aux. cooler, return to trans

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