1988-1990 GMC S15 4.3L V6. 1987-1990 GMC S15 2.5L 4 Cyl. 1984-1985 GMC S15 2.2L 4 Cyl. 1982-1983, 1985 GMC S15 1.9L 4 Cyl. Larger opening for increased coolant flow. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.
