Parts Geek - For 1979-1980 GMC K1500 Ported Vacuum Switch SMP 91591TF. Notes: Ported Vacuum Switch -- OE No. 3031549; Blue; 2 Ports. Contents: Ported Vacuum Switch. 1979-1980 GMC K1500. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.
