Part Type: Engine Cooling Fan Clutch. Notes: Counter Clockwise; Severe Duty Thermal Fan Clutch. Reverse Rotation Severe Duty Thermal Fan Clutch. Fan Clutch. Electronic Clutch?. : Non Electronic. 2006 Chevrolet Silverado 2500 HD Engine: 6.6L V8; Counter Clockwise; Severe Duty Thermal Fan Clutch;.