How do you change a supercharger belt on a 3800?

To change the supercharger belt on a 3800 engine, first ensure the vehicle is off and cool. Remove the serpentine belt by loosening the tensioner pulley with a wrench and sliding the belt off. Then, take off the supercharger belt by loosening the tensioner for that belt and removing it from the pulleys. Install the new supercharger belt by routing it according to the belt diagram, ensuring it sits properly in the grooves, and then reapply tension to the tensioner.