Ported Vacuum Switch (#PVS49) for Chevy / Olds / Pontiac 82-86 Home » Air Bypass Valve | Ported Vacuum Switch Additional Images: Click to view.YearMake / ModelEngine82Cadillac / cimarron 85-86Chevrolet / chevette 82-83Oldsmobile / firenza 86-87Pontiac / t1000 Retail Price: $19.55Your Price: $ Quantity: