Notes: Ported Vacuum Switch -- Gray; 4 Ports. 1987 GMC V3500 5.7L V8. 1987 GMC V3500 7.4L V8. 1988 GMC V3500 5.7L V8. 1988 GMC V3500 7.4L V8. 1989 GMC V3500 5.7L V8. 1989 GMC V3500 7.4L V8. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.
