Parts Geek - For 1978 GMC K25 Fan Clutch 98911RSPY. 1978 GMC K25 4.8L 6 Cyl. 1978 GMC K25 4.1L 6 Cyl. Notes: Fan Clutch -- Standard Rotation; Optional Non-Thermal Fan Clutch. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.
