US Motor Works 22628 Thermal Engine Cooling Fan Clutch for GM Trucks

The US Motor Works 22628 is a thermal engine cooling fan clutch engineered as a direct-fit replacement for select 2004–2007 General Motors trucks. Designed to meet or exceed original equipment specifications, this fan clutch uses viscous fluid technology to regulate cooling fan engagement based on engine temperature — maximizing cooling efficiency when needed and reducing parasitic engine load when it is not.

As engine temperature rises, the viscous fluid inside the clutch thickens, engaging the fan to draw more airflow through the radiator. At lower operating temperatures, the fluid thins and the fan disengages, helping to improve fuel efficiency and reduce unnecessary engine wear.

Key Features:

• Thermal (viscous) fan clutch design for temperature-responsive operation
• High-load bearings for improved durability and wear resistance
• Reinforced shaft design for greater strength and increased load capacity
• Smooth surface finish reduces stress risers and extends service life
• Staked shaft end for anti-rotation protection
• CNC-machined, tapped, and drilled mounting surfaces for leak-free fitment
• Engineered to meet or exceed OEM specifications
• Manufactured by an ISO 9001:2015 certified company

The US Motor Works 22628 is a precision-engineered replacement fan clutch built to restore proper cooling system performance to compatible GM truck applications. Designed and tested in the USA, it delivers the reliability and consistency expected of a professional-grade cooling component.