What should my pressure be? Make Model Spec VECTRA A. 14 OPTVECTRA A. 15 OPTVECTRA A. BASEVECTRA C. BASEVECTRA C. BASE OPTVECTRA C. EDITION 17 OPTVECTRA C. EDITION, SPORT, COSMO 19 OPTVECTRA C. EDITION, SPORT, EDITION 18 OPTVECTRA C. OPCVECTRA C. OPC 19 OPTVECTRA C. SPORT, COSMO