Chevy Impala Serpentine Belt Diagram: 2004

The best diagram is the physical sticker located on the radiator core support or fan shroud under the hood. For 2004 models, many have faded or fallen off. The next best is a model-specific YouTube video for your engine size. The Actual Diagrams (Text Description) For 3.8L V6 (Most Common) Routing direction: Crankshaft (bottom) → AC Compressor (passenger side low) → Power Steering (top passenger) → Water Pump (center top) → Alternator (driver side top) → Tensioner → Idler Pulley → back to Crank.