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,

 

Fan is likely fine, locks up more during summer when running the ac to pull air thru the condenser.