GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Turn ignition OFF.
  2. Loosen battery hold down cover screws and remove battery cover.
  3. Disconnect intake manifold runner control solenoid (IMRC) harness connector.

  4. Object Number: 956341  Size: SH
  5. Remove vacuum hose from bank 2 intake manifold runner diaphragm.
  6. Remove clamp from power brake booster vacuum hose at intake manifold and remove vacuum hose.
  7. Remove IMRC solenoid attachment screw.
  8. Remove both vacuum lines from IMRC solenoid and remove IMRC solenoid.

Installation Procedure


    Object Number: 956341  Size: SH

    Important: The vacuum line that goes to both diaphragms is attached to the solenoid vacuum port that faces down, which is perpendicular to the electrical connector.

  1. Reconnect both vacuum lines to IMRC solenoid noting that the vacuum line to the diaphragms attaches to the vacuum port perpendicular to the electrical connector.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install IMRC solenoid and IMRC solenoid attachment screw to the intake manifold.
  4. Tighten
    Tighten the intake manifold runner control solenoid to intake manifold screw to 8 N·m (71 lb in).

  5. Connect power brake booster vacuum hose with clamp to intake manifold.
  6. Connect vacuum hose to bank 2 intake manifold runner diaphragm.
  7. Connect IMRC solenoid harness connector. Push connector in until the lock position is felt, than pull back to confirm engagement.
  8. Install battery cover and tighter hold down screws.