How do i replace the serpentine belt on a 2009 hyundai santa fe

When you buy the belt at an auto parts store get the special tool needed to release the spring tension on the belt. It isn't too expensive. With the tool in place on the tensioner pulley you push on the bar to relax the tension on the belt . Remove the belt and release the tensioner. Wrap the belt around all the pulleys according to the diagram located under the hood. When you get ready to push the belt under the tensioner pulley simply push the bar on the tool again to move the tensioner pulley away from the belt then push the belt under the pulley and let go of the bar. It's done.