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so, when its cold out, or it rains. My truck's belt squeals like non other till the truck gets a bit warmer. Anyone have any ideas on what could be causing it. When its dry out, but really cold it makes the sound a bit more then if it were wet. But again once the truck warms up about 5 min, the squeal from the belt stops.
thanks.

 

Great thread title (very descriptive)...

It may be a worn out pulley bearing. Take off the belt and with the engine cold try to spin the pulleys by hand. See if any of them are hard to spin or if any make noise.

It also may be coming from the fan clutch. When the engine is cold and turned off (& belt on the engine) try to spin the fan by hand. The fan should turn with only a little resistance and it shouldn't make any noise.