GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 785797  Size: SH
  1. Disconnect the air intake duct hose from the Mass Air Flow (MAF)/Intake Air Temperature (IAT) sensor.

  2. Object Number: 785804  Size: SH
  3. Remove the bolt securing the intake air resonator to the cooling fan assembly.

  4. Object Number: 785802  Size: SH
  5. Disconnect the air intake duct hoses from the throttle body.

  6. Object Number: 785800  Size: SH
  7. Lift the intake air resonator from the front frame in order to access the electrical connector and vacuum hoses.

  8. Object Number: 785803  Size: SH
  9. Disconnect the electrical connector from the intake resonance switchover solenoid.
  10. Important: Note the routing of the vacuum hoses.

  11. Disconnect the vacuum hoses from the following components:
  12. • The coolant bypass solenoid
    • The intake plenum switchover solenoid
    • The vacuum brake booster hose
  13. Carefully position aside the following while removing the intake air resonator from the vehicle:
  14. • The surge tank inlet hose
    • The upper radiator hose

Installation Procedure


    Object Number: 785803  Size: SH
  1. Carefully position aside the following while installing the intake air resonator in the engine compartment:
  2. • The surge tank inlet hose
    • The upper radiator hose
  3. Route the vacuum hoses as previously noted.
  4. Connect the vacuum hoses to the following components:
  5. • The coolant bypass solenoid
    • The intake plenum switchover solenoid
    • The vacuum brake booster hose
  6. Connect the electrical connector to the intake resonance switchover solenoid.

  7. Object Number: 785800  Size: SH
  8. Insert the intake air resonator guide pins into the rubber mounts located in the front frame.

  9. Object Number: 785802  Size: SH
  10. Connect the air intake duct hoses to the throttle body.
  11. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 785804  Size: SH
  12. Install the bolt securing the intake air resonator to the cooling fan assembly.
  13. Tighten
    Tighten the intake air resonator retaining bolt to 9 N·m (80 lb in).


    Object Number: 785797  Size: SH
  14. Connect the air intake duct hose to the MAF/IAT sensor.