Part Type: Engine Cooling Fan Clutch. Manufacturer: Four Seasons. 1979 GMC G1500 Engine: 4.1L L6; Standard Rotation; Optional Standard Duty Thermal Fan Clutch; w/o AC;. 1986 GMC G1500 Engine: 4.3L V6; Standard Rotation; Standard Duty Thermal Fan Clutch; w/o AC;.
