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1999 - 2006 (GMT800) Section for all discussion related to the 1999-2006 Chevrolet and GMC trucks.

Fan Clutch

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Old June 27th, 2016, 7:52 PM
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Default Fan Clutch

Hello all,
I've noticed recently I seem to hear my fan running faster/louder than I typically would.
What are the signs of the fan clutch is not doing what it's suppose to do?

When traveling down the high way at 85ish it seems I can hear that fan spinning really loudly.

Even sometimes when i'm driving around town doing 45 it seems the fan is louder than it should be.
I guess i'm not too sure how or what I should or shouldn't be hearing when it comes to the fan.

This is on a 2004 2500HD with the 6.6 Duramax engine.

Any help would be great.
Thanks,
Old June 28th, 2016, 9:14 AM
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Fan is likely fine, locks up more during summer when running the ac to pull air thru the condenser.




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