How do you replace serpentine belt on 2005 dodge diesel 2500 pick-up?

To replace the serpentine belt on a 2005 Dodge Diesel 2500 pickup, first, locate the belt routing diagram, usually found on a sticker under the hood. Use a ratchet or a serpentine belt tool to relieve tension on the belt by rotating the tensioner pulley. Remove the old belt and carefully route the new one according to the diagram, ensuring it sits properly on all pulleys. Finally, release the tensioner to apply tension to the new belt and double-check that it is aligned correctly.