Part Type: Engine Cooling Fan Clutch. Standard Rotation Non-Thermal Fan Clutch. Fan Clutch. 1979 GMC G3500 Engine: 4.1L L6; Standard Rotation; Non-Thermal Fan Clutch; w/o AC;. 1982 GMC G3500 Engine: 4.1L L6; Standard Rotation; Optional Non-Thermal Fan Clutch; w/o AC;.
