07 Chevy Tahoe 5.3 cooling fan stays on only when car is on and stays on until i turn off my car

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swathdiver

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I totally just went for the 3 relays and the fans still are the same. Cars r just so annoying especially when your a female haha
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If you check your grounds and if a basic code doesn't show any codes, then it is time for a bi-directional scan tool for further diagnosis.

It is normal for both fans to run a high speed and when they do, they move a lot of air and make sounds as you describe.

On this forum is a Tech-2 owner's map, that lists members with this bi-directional scan tool that are willing to help other members out with their car problems. Check it out. I have one and am in Florida.
 
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