Four Seasons 46090 Engine Cooling Fan Clutch

Four Seasons 46090 Severe Duty Fan Clutch

The Four Seasons 46090 is a thermal engine cooling fan clutch built for severe duty and truck fan drive applications. It is a new, non-electronic aluminum unit with reverse rotation operation, made to meet or exceed OEM requirements for the listed Chevrolet Silverado and GMC Sierra applications.

Key Features

• Brand Line: Four Seasons Fan Clutch
• Part Number: 46090
• Thermal, non-electronic fan clutch for reverse rotation cooling systems
• Severe duty and truck fan drive design
• Aluminum construction with raw aluminum finish
• 4-bolt / 4-mount-hole design with HEX mounting type
• Bolt thread: M10x1.500
• Fan bolt circle: 3.25 in. / 82.6 mm
• Mount diameter: 1.44 in. / 37 mm
• Pilot diameter: 1.18 in. / 30 mm
• Meets or exceeds OEM specifications
• Performance rated and new, not remanufactured

Product Details

Four Seasons Fan Clutch 46090 is engineered for reverse rotation engine cooling systems used in heavy-duty GM trucks. Its thermal design responds to operating temperature to help control fan engagement in demanding driving conditions, including towing, hauling, and stop-and-go use. This part cross-references Gates 22123 for the same application.

Compatible With 2011-2019 Chevrolet Silverado 2500 HD, N/A; 2011-2019 Chevrolet Silverado 3500 HD, N/A; 2011-2019 GMC Sierra 2500 HD, N/A; and 2011-2019 GMC Sierra 3500 HD, N/A. It also fits 2011-2013 Chevrolet Silverado 1500, N/A; 2011-2013 GMC Sierra 1500, N/A; 2011-2013 Chevrolet Silverado 3500, N/A; and 2015-2018 Chevrolet Silverado 3500, N/A.

Common Cooling System Issues Addressed

• Fan clutch engagement problems that affect engine cooling performance
• Excessive fan noise from a worn or failing clutch
• Overheating concerns during heavy load or severe duty operation
• Inconsistent fan drive response in reverse rotation applications
• Cooling system performance loss on Silverado and Sierra truck platforms

Installation Notes and Tips

Verify reverse rotation, bolt pattern, pilot dimensions, and fan bolt circle before installation. This unit uses a HEX mounting type and M10x1.500 bolt thread, and mounting hardware is not included. Confirm clearance, clutch-to-flange distance, and overall height against the original part before service. For fitment-specific searches, this is a direct-match option for 2011-2019 Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD fan clutch replacement applications.

Quality Assurance

Four Seasons lists this fan clutch as new, performance rated, and built to meet or exceed OEM specifications. The aluminum severe duty construction supports consistent operation in truck cooling applications, and the part number 46090 is backed by Four Seasons product engineering standards.