GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1623764  Size: SH
  1. Remove the throttle body. Refer to Throttle Body Assembly Replacement .
  2. Disconnect the fuel injector electrical connector (2).

  3. Object Number: 1623541  Size: SH
  4. If equipped with a manual transaxle, disconnect the engine harness clips (2 and 4) from the intake manifold.
  5. Disconnect the engine harness clip (1) from the oil level indicator tube.
  6. Disconnect the fuel injector electrical connector clip (3) from the intake manifold.

  7. Object Number: 1623549  Size: SH
  8. If equipped with a automatic transaxle, disconnect the engine harness clips (2 and 4) from the intake manifold.
  9. Disconnect the engine harness clip (2) from the oil level indicator tube.
  10. Disconnect the fuel injector electrical connector clip (4) from the intake manifold.

  11. Object Number: 1623766  Size: SH
  12. Disconnect the evaporative emission (EVAP) canister purge tube from the intake manifold and the EVAP solenoid. Refer to Plastic Collar Quick Connect Fitting Service .
  13. Remove the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement .
  14. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .

  15. Object Number: 1623769  Size: SH
  16. Remove the intake manifold lower bolts (1).

  17. Object Number: 1623770  Size: SH
  18. Remove the intake manifold upper bolt and nuts.
  19. Remove the intake manifold.
  20. Important: The intake manifold O-rings seals are reusable, only replace the seals if damage has occurred.

  21. Inspect the intake manifold O-ring seals.

Installation Procedure


    Object Number: 1623770  Size: SH
  1. Install NEW intake manifold O-ring seals if necessary.
  2. Install the intake manifold.
  3. Install the intake manifold upper bolt and nuts.
  4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1623769  Size: SH
  5. Install the intake manifold lower bolts (1).
  6. Tighten
    Tighten the bolts/nuts to 10 N·m (89 lb in).


    Object Number: 1623766  Size: SH
  7. Install the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
  8. Install the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement .
  9. Connect the EVAP canister purge tube to the intake manifold and the EVAP solenoid. Refer to Plastic Collar Quick Connect Fitting Service .

  10. Object Number: 1623549  Size: SH
  11. If equipped with a automatic transaxle, connect the engine harness clips (2 and 4) to the intake manifold.
  12. Connect the engine harness clip (2) to the oil level indicator tube.
  13. Connect the fuel injector electrical connector clip (4) to the intake manifold.

  14. Object Number: 1623541  Size: SH
  15. If equipped with a manual transaxle, connect the engine harness clips (2 and 4) to the intake manifold.
  16. Connect the engine harness clip (1) to the oil level indicator tube.
  17. Connect the fuel injector electrical connector clip (3) to the intake manifold.

  18. Object Number: 1623764  Size: SH
  19. Connect the fuel injector electrical connector (2).
  20. Install the throttle body. Refer to Throttle Body Assembly Replacement