How do you change serpentine belt on 3.0 2007 ford ranger?

To change the serpentine belt on a 2007 Ford Ranger with a 3.0L engine, start by locating the belt routing diagram, usually found on a sticker near the engine. Use a wrench or socket to rotate the tensioner pulley counterclockwise to relieve tension on the belt, and then remove the old belt. Install the new belt by following the routing diagram, ensuring it's properly seated on all pulleys, and finally, release the tensioner to secure the belt. Double-check the belt alignment before starting the engine.