changing the AC belt. on 2005 Scion xB

when i turn on the ac, it makes a horrible squeal. turn off ac, goes away. is it difficult to change a belt?

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2 answers
no the a/c belt is easy to change, the bottom bolt on the alt. is really tight thou. Check the p/s belt while you're there, the whole job should take 30 minutes and you'll need to remove the pass. half of the front splash sheild.
This may be due to a loose belt, bad belt tensioner, but it's also likely the A/C compressor has a problem.