1966 GMC 3500 Engine: 4.1L L6; Standard Rotation|Optional Non-Thermal Fan Clutch;. 1966 GMC 3500 Engine: 4.8L L6; Standard Rotation|Optional Non-Thermal Fan Clutch;. 1966 GMC 3500 Engine: 5.0L V6; Standard Rotation|Optional Non-Thermal Fan Clutch;.
Auto Plus/Hayden 2676 Cooling Fan, Clutch and Motor - Engine Cooling Fan Clutch
Auto Plus/Hayden 2765 Cooling Fan, Clutch and Motor - Engine Cooling Fan Clutch
Auto Plus/Hayden 2682 Cooling Fan, Clutch and Motor - Engine Cooling Fan Clutch
Auto Plus/Hayden 2618 Cooling Fan, Clutch and Motor - Engine Cooling Fan Clutch
Auto Plus/Hayden 2691 Cooling Fan, Clutch and Motor - Engine Cooling Fan Clutch
Auto Plus/Hayden 2683 Cooling Fan, Clutch and Motor - Engine Cooling Fan Clutch