Humming noise after ignition is cut off?

CHEVROLET IMPALA
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EBONYJ32
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Hello,

I have a 2001 Chevy Impala with 126k miles and a 3.4l engine size. Lately I have noticed that every time I turn off my engine, I hear this loud humming noise coming from the engine area. It seems like the car is still "running" per se. Please advise what could be causing this noise and how to have it stop. I appreciate any advice given. Thanks.
Feb 1, 2007 at 2:37 AM
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2CARPRO JACK
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Have you opened the hood to see if anything is visibly running (cooling fan) ? Might have a sticky relay
Feb 1, 2007 at 7:43 AM