Never use a 3-finger style or anything else that wasn't designed to remove a S/C pulley.
Here's a pic of what the proper puller looks like. If it doesn't look like the one in the pic, don't use it or you''l destroy the pulley without being able to remove it. You could also damage the shaft when using the wrong puller.
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Bobby
Died 5/1/08, resurrected 5/15/08
ASCD SD hood, 17" Bullitts, Overkill PCM, 3.4" Pulley, NGK TR55IX, K&N 9" cone filter, JimmyC D/P, U-bend removed, Flowmaster 40 series, Hooker big bore tips with resonators, S/B brake lines, drilled/slot rotors, GMPP handling kit, KYB struts, F&R strut supports, HID's, LED's, 2.5" Air Dam, red GTP overlays on custom badges, white rear insert.