The 2004 Grand Prix belt diagram provides a visual guide for routing the serpentine belt around pulleys and accessories in the engine bay. Its core purpose is ensuring correct installation during belt replacement to prevent:
- Avoiding Component Failure: Incorrect routing causes rapid belt wear, accessory bearing damage, or snapped belts.
- Maintaining Critical Functions: The serpentine belt drives essential systems like the alternator, power steering pump, water pump, and A/C compressor.
- Ensuring Proper Tension: The diagram clarifies tensioner pulley positioning for optimal belt grip without slippage or overtightening.
When Owners Need This Diagram
- Belt Replacement: Mandatory reference when installing new serpentine belts after wear or cracking.
- Post-Repair Reassembly: Vital if components like the alternator or tensioner were removed.
- Troubleshooting Noise/Issues: Helps verify routing if squealing or accessory malfunctions occur.
Locating the Correct Diagram
Check underhood decals, often near the radiator support or strut tower. If missing, refer to your owner’s manual supplement or repair manuals. Diagrams vary by engine (e.g., 3.8L V6 vs. other configurations)—always match your specific engine code.