Vacuum Hose Diagram(S)

NOTE: The following vacuum diagrams are courtesy of General Motors Corp. Information is not available for models not listed. Letters in parenthesis are the emission calibration code, located on underhood emissions label.

Fig 1: 4.3L TBI "G" Series Calif./Fed./High Alt. All Trans. (RAY, RAZ & RHU)

Fig 2: 4.3L TBI "P" Series Calif./Fed. All Trans. (RHP)

Fig 3: 4.3L TBI "P" Series Fed. All Trans. (RHR & RHS)

Fig 4: 5.0L TBI "G" Series Fed./High Alt. All Trans. (RFK & RFS)

Fig 5: 5.7L TBI "G" Series Calif. A/T (RFT)

Fig 6: 5.7L TBI "G" Series Calif./Fed. All Trans. (RJH)

Fig 7: 5.7L TBI "P" Series Calif./Fed. All Trans. (RJA, RHB, RJC & RJD)

Fig 8: 7.4L TBI "G" & "P" Series Calif./Fed. All Trans. (RJS, RJU & RJY)

Fig 9: 7.4L TBI "P" Series Calif./Fed. All Trans. (RJT & RJW)