Changing a belt on a 1998 Oldsmobile 88?

To change the belt on a 1998 Oldsmobile 88, first ensure the engine is off and cool. Locate the serpentine belt routing diagram, usually found on a sticker under the hood, to understand how the belt is threaded. Use a ratchet and socket to relieve tension on the tensioner pulley, then remove the old belt. Finally, install the new belt according to the routing diagram, ensuring it sits correctly on all pulleys before releasing the tensioner.