Hayden 2780 Engine Cooling Fan Clutch

Hayden 2780 Severe Duty Fan Clutch

The Hayden 2780 is a thermal, reverse-rotation engine cooling fan clutch built for severe-duty truck and towing applications. It uses an aluminum construction and a non-electronic design to help maintain proper fan engagement in demanding cooling systems.

Key Features

• Severe-duty thermal fan clutch for truck and heavy-load cooling demands
• Reverse rotation design for the listed Chevrolet and GMC applications
• Aluminum housing with raw aluminum finish
• Non-electronic clutch type with thermal operation
• 4-bolt mounting pattern with HEX mounting type
• Meets or exceeds OEM requirements
• Performance rated for severe-duty use
• New replacement part, Hayden 2780

Product Details

Hayden Fan Clutch 2780 is a D-style severe-duty truck fan drive engineered for reverse-rotation cooling systems. It features a 6.45-inch maximum diameter, 3.77-inch overall height, 1.44-inch mount diameter, and a 3.25-inch fan bolt circle. The thermal design responds to temperature changes to help control fan engagement in high-demand driving conditions. This part cross-references Four Seasons 46018 for the same application.

Compatible With 2001-2007 Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, Chevrolet Suburban 2500, Chevrolet Avalanche 2500, Chevrolet Express 3500, GMC Sierra 2500 HD, GMC Sierra 3500, GMC Yukon XL 2500, and GMC Savana 3500 applications listed below. The Hayden 2780 is also a direct-fit option for 2007 Chevrolet Silverado 2500 HD Classic, Chevrolet Silverado 3500 Classic, GMC Sierra 2500 HD Classic, and GMC Sierra 3500 Classic.

Common Cooling Issues This Part Addresses

• Fan clutch that stays engaged too long or does not engage properly
• Reduced cooling performance during towing or heavy hauling
• Excessive engine temperature in stop-and-go or high-load driving
• Cooling fan noise caused by a worn thermal clutch
• Loss of airflow control in reverse-rotation fan systems

Installation Notes and Tips

Verify reverse rotation, bolt pattern, pilot dimensions, and fan bolt circle before installation. Mounting hardware is not included. Confirm the vehicle uses a thermal, non-electronic fan clutch and match the application to the listed Chevrolet Silverado 2500 HD, Silverado 3500, Suburban 2500, Avalanche 2500, Express 3500, GMC Sierra 2500 HD, Sierra 3500, Yukon XL 2500, or Savana 3500 fitment.

• Fits 2007 Chevrolet Silverado 2500 HD Classic, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2007 Chevrolet Silverado 3500 Classic, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2007 GMC Sierra 2500 HD Classic, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2007 GMC Sierra 3500 Classic, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2003-2006 Chevrolet Avalanche 2500, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2006 Chevrolet Silverado 1500, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2003-2006 Chevrolet Silverado 2500 HD, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2003-2006 Chevrolet Silverado 3500, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2003-2006 Chevrolet Suburban 2500, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2003-2006 GMC Sierra 2500 HD, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2003-2006 GMC Sierra 3500, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2003-2006 GMC Yukon XL 2500, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2002 Chevrolet Avalanche 2500, N/A; Reverse Rotation; Severe Duty Thermal Fan Clutch; New Body Style
• Fits 2001-2002 Chevrolet Express 3500, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2001-2002 Chevrolet Silverado 2500 HD, N/A; Reverse Rotation; Severe Duty Thermal Fan Clutch; New Body Style
• Fits 2001-2002 Chevrolet Silverado 3500, N/A; Reverse Rotation; Severe Duty Thermal Fan Clutch; New Body Style
• Fits 2001-2002 Chevrolet Suburban 2500, N/A; Reverse Rotation; Severe Duty Thermal Fan Clutch; New Body Style
• Fits 2001-2002 GMC Savana 3500, N/A; reverse rotation severe duty thermal engine cooling fan clutch
• Fits 2001-2002 GMC Sierra 2500 HD, N/A; Reverse Rotation; Severe Duty Thermal Fan Clutch; New Body Style
• Fits 2001-2002 GMC Sierra 3500, N/A; Reverse Rotation; Severe Duty Thermal Fan Clutch; New Body Style
• Fits 2001-2002 GMC Yukon XL 2500, N/A; Reverse Rotation; Severe Duty Thermal Fan Clutch; New Body Style

Quality Assurance

Hayden Fan Clutch 2780 is a new replacement part that meets or exceeds OEM requirements and is performance rated for severe-duty service. Hayden’s Fan Clutch line is built for cooling-system applications that require accurate thermal fan control in truck and heavy-duty use.