Parts Geek - For 1975-1978 GMC C15 Fan Clutch 54741DCYW 1976 1977. 1977-1978 GMC C15 5.0L V8. 1975-1977 GMC C15 4.8L 6 Cyl. 1975-1977 GMC C15 4.1L 6 Cyl. 1975-1978 GMC C15 5.7L V8. Notes: Fan Clutch -- Standard Rotation; Optional Non-Thermal Fan Clutch.
