http://www.partsamerica.com/ProductD...tnumber=T74193
Theres one I picked out of the blue. The generic ones are ~20 bucks. Specialty ones are a bit more. Just have to find one that fits your size pulley and go to work. By the way, I'm assumming you've got a run of the mill press-on pulley like everything else uses. Ya never know with GM, but as long as you do it'll work.
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