I've done pulleys on a 99 LS1 Camaro and on a 04 LS1 GTO and both times the challenge was removing the OEM bolt and pulley. Bolt removal required stopping the crank from spinning and pulley removal required a puller.
For the Z is a puller needed (space is really tight in there) and is it necessary to immobilize the crank to loosen the bolt?
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