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My GMC Yukon made a humming sound like a fan when I crunk it…

Customer Question
My GMC Yukon made...

My GMC Yukon made a humming sound like a fan when I crunk it up, it stopped shortly after. What could this be?

Mechanic's Assistant: What year is your Yukon?

2007

Mechanic's Assistant: Are you fixing your Yukon yourself? What have you tried so far?

No it just happened trying to find out what could it possibly be?

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

I did have a/c work done on it a few weeks ago

Submitted: 3 months ago.Category: GM
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Answered in 2 minutes by:
3/28/2018
GM Mechanic: Mike V., Auto Service Technician replied 3 months ago
Mike V.
Mike V., Auto Service Technician
Category: GM
Satisfied Customers: 27,508
Experience: 25 years of experience, Certified Subaru Technician and Nissan factory trained.
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GM Mechanic: Mike V., Auto Service Technician replied 3 months ago

It sounds like the fan clutch was working when you first fired it up. This happens once in a while and then it will slow down or shut off. It could possibly be related to the a/c work or it could just be the temp was high enough to make it kick on. I would not think it's a problem unless it becomes very consistent, then I would have it checked, but it would usually also cause the check engine light to come on if it's a problem.

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