2024 GMC Sierra 3500 HD Engine: 6.6L V8 FLEX; Counter Clockwise; Severe Duty Thermal Fan Clutch;. 2024 GMC Sierra 3500 HD Engine: 6.6L V8 GAS; Counter Clockwise; Severe Duty Thermal Fan Clutch;. 2020 GMC Sierra 3500 HD Engine: 6.6L V8; Counter Clockwise; Severe Duty Thermal Fan Clutch;.
