Fan clutch on a lot....

[rt_hawk]

So my new truck is bugging me, even before the truck is all the way warmed up it sounds like my fan clutch keeps going on and off. When I first drive the truck it ussually will do it until I hit 30, then stops, but then when I will be idling in drive or park the fan will "whhhhirrrrlllll" then quiet down, then whhhhirl again. It won't stop until I start going down the road again. It's only 30f for a high. And the truck takes forever to warm up it seems. Any idea what's going on? Just had the latest reflash done yesterday...did this before that too...

[montana6.0]

Might be a sensor out i had it happen to another truck but the fan would run constantly.

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[rt_hawk]

Well it seems I have the snow plow package w/ the "snow plow" vicious fan clutch, which would explain why the fan does runs like it does when I am driving slowly or parked...guess I will live with it...