4 Seasons Engine Cooling Fan Clutch For 1977-1978 GMC K35

Compatible Years: 1977 1978. Part Type: Engine Cooling Fan Clutch. 1977 GMC K35 Engine: 5.7L V8; Standard Rotation; Optional Duty Thermal Fan Clutch;. 1978 GMC K35 Engine: 4.8L L6; Standard Rotation; Severe Duty Thermal Fan Clutch; w/ A/C;.