Part Type: Engine Cooling Fan Clutch. 1979 GMC G1500 Engine: 4.1L L6; Standard Rotation; Non-Thermal Fan Clutch; w/o A/C;. Fan Clutch. Standard Rotation Non-Thermal Fan Clutch. 1986 GMC G1500 Engine: 4.3L V6; Standard Rotation; Optional Non-Thermal Fan Clutch; w/o A/C;.
