Standard Motor Products PVS89 Standard Motor Ported Vacuum Switches | Summit Racing
Ported Vacuum Switches
Standard Ignition PVS82 Ported Vacuum Switch | Fits Chevrolet Blazer, Chevrolet C10, Chevrolet C10 Suburban
Standard Ignition Ported Vacuum Switch PVS14 | O'Reilly Auto Parts
SWITCH, Ported Vacuum / E.F.E. / EGR Control, 4 port, installs on RH front of intake manifold, correct blue color, original GM p/n 3040871, NOS GM - #C-3670-234 - National Parts Depot