1988 GMC R3500 Engine: 5.7L V8; Reverse Rotation; Optional Duty Thermal Fan Clutch; Fan Mounting Holes are 10 mm.;. 1988 GMC R3500 Engine: 7.4L V8; Reverse Rotation; Severe Duty Thermal Fan Clutch; Fan Mounting Holes are 10 mm.;.
Auto Plus/Hayden 2676 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
Auto Plus/Hayden 2614 Cooling Fan, Clutch and Motor - Engine Cooling Fan Clutch
Auto Plus/Hayden 2671 Cooling Fan, Clutch and Motor - Engine Cooling Fan Clutch