1985 GMC S15 Engine: 2.5L L4; Standard Rotation; Standard Duty Thermal Fan Clutch; w/o A/C;. 1986 GMC S15 Engine: 2.5L L4; Standard Rotation; Standard Duty Thermal Fan Clutch; w/o A/C;. 1986 GMC S15 Engine: 2.8L V6; Standard Rotation; Optional Standard Duty Thermal Fan Clutch; w/ A/C;.
