Part Type: Engine Cooling Fan Clutch. Reverse Rotation Severe Duty Thermal Fan Clutch. Fan Clutch. Electronic Clutch?. : Non Electronic. Thermal Or Centrifugal: D - Severe Duty & Truck Fan Drive. 2007 Chevrolet Silverado 2500 Engine: 4.8L V8; Counter Clockwise; Optional Duty Thermal Fan Clutch; w/ AC;.