GM Service Manual Online
For 1990-2009 cars only

Intake Manifold Disassemble Upper


    Object Number: 276390  Size: SH
  1. Remove the throttle body nuts.

  2. Object Number: 276386  Size: SH
  3. Remove the throttle body.

  4. Object Number: 276417  Size: SH
  5. Remove and discard the throttle body gasket.
  6. Remove the throttle body studs, if required.

  7. Object Number: 276413  Size: SH

    Important: Note the position of the exhaust gas recirculation (EGR) valve before removal. It is possible to improperly install the EGR valve 180 degrees from the original position.

  8. Remove the EGR valve bolts.
  9. Notice: The Linear EGR valve is an electrical component. DO NOT soak in any liquid cleaner or solvent because damage may result.

  10. Remove the EGR valve.
  11. Remove the EGR gasket.

  12. Object Number: 351775  Size: SH
  13. Remove the evaporative emission (EVAP) purge valve bolts.
  14. Remove the EVAP purge valve.

Intake Manifold Disassemble Lower


    Object Number: 19673  Size: SH
  1. Remove the MAP sensor retainer nut.
  2. Remove the MAP sensor retainer.
  3. Remove the MAP sensor.

  4. Object Number: 276369  Size: SH
  5. Remove the fuel rail bolts and stud.
  6. Remove the fuel rail.

  7. Object Number: 180908  Size: SH
  8. Remove the coolant outlet housing bolts.
  9. Remove the coolant outlet housing.
  10. Remove the thermostat.

  11. Object Number: 492034  Size: SH
  12. Remove the thermostat bypass fitting, if required.

  13. Object Number: 492035  Size: SH
  14. Remove the engine coolant air bleed fitting (1), if required.
  15. Remove the ECT sensor hole plug (2), if required.