'96 Blazer noise problem

When the weather gets REALLY cold, my dad's '96 blazer he bought around a month ago makes a real loud noise. He says that it's a grindy noise and it's loud enough to hurt his ears. He doesn't think it's the altenator and
he just replaced the idler. 117k. Typical Blazer - he's already put $1500 into it.
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Oh, and once it warms up, it's fine.

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Travis King wrote:

around a

noise and

altenator
already put

Maybe it's the fan clutch. They often make noise when worn.
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