You failed to mention which engine you have. Here are basic instructions for belt replacement; 2.7L Engine: REMOVAL GENERATOR/POWER STEERING BELT Loosen tensioner pulley locking nut. Loosen belt adjusting bolt. Remove generator/power steering belt. AIR CONDITIONING BELT NOTE: The A/C drive belt self tensioner is NOT a dynamic tensioner. After adjustment the tensioner bracket bolts are tightened. The torsion spring is no longer responsible for tensioning the A/C belt. The torsion spring is only used for initial belt tensioning. Remove generator/power steering belt to gain access to A/C belt. Loosen BUT DO NOT REMOVE tensioner locking bolt and pivot bolt Insert 1/2” drive breaker bar into square opening on belt tensioner. Rotate tensioner counterclockwise until belt can be removed from pulleys. Slowly rotate tensioner clockwise to relieve spring load.
3.2/3.5L Engine: GENERATOR/POWER STEERING BELT The Poly-V generator/power steering belt has an adjustable tensioner pulley located on the front timing belt cover. Loosen tensioner pulley locking nut. Raise vehicle on hoist. Remove the two (2) push clips attaching lower air shield to engine cradle. Remove air shield. Loosen tensioner adjusting bolt until the belt can be removed. AIR CONDITIONING BELT Remove generator/power steering drive belt to gain access to the air conditioning drive belt. To remove air conditioning drive belt, first loosen the tensioner pulley lock nut, then loosen the adjusting screw to the tensioner pulley assembly until the belt can be removed