Before you begin working on the replacement of serpentine belt on 2001 CADILLAC CATERA or any other model of the vehicle, ensure that you inspect the belt for signs of glazing or cracking. To tell which one is good or glazed belt, you can observe the surface. A glazed belt will be perfectly smooth from slippage, while a good belt will have a slight texture of fabric visible.
Usually the cracks will start from the inner edge of the belt and it will run outward gradually. If you spot any worn or damaged serpentine belt, it should be immediately replaced otherwise a critical issue can happen later.
Also do not use belt dressing on the belt. Belt dressing causes the breakdown of the composition of the drive belt. Failure to follow this recommendation will damage the drive belt.