Put it in reverse. Use a breaker bar to loosen the pulley bolt. Slide a pipe over the end of the breaker bar to get extra leverage. You'll need a pulley remover...you can get one from Advance or any other auto parts store. It'll probably run you around $100 for the deposit on the pulley puller. I can't stress enough to use a torque wrench to put the bolt back on. Set it to the lbs specs. You can find the specs online.