Part Type: Engine Cooling Fan Clutch. Notes: Counter Clockwise; Severe Duty Thermal Fan Clutch; Threaded Type. Reverse Rotation Severe Duty Thermal Fan Clutch. Fan Clutch. 1999 Chevrolet C1500 Suburban Engine: 6.5L V8; Counter Clockwise; Severe Duty Thermal Fan Clutch; Threaded Type;.