1987 GMC R2500 Suburban Engine: 5.7L V8; Standard Rotation; Severe Duty Thermal Fan Clutch; Fan Mounting Holes are 5/16 In.;. Part Type: Engine Cooling Fan Clutch. 1991 GMC R2500 Suburban Engine: 5.7L V8; Standard Rotation; Severe Duty Thermal Fan Clutch; Fan Mounting Holes are 5/16 In.;.
