GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Important: The intake manifold, throttle body, fuel rail, and injectors may be removed as an assembly. If not servicing the individual components, remove the manifold as a complete assembly.


    Object Number: 1551866  Size: SH
  1. Remove the throttle body. Refer to Throttle Body Assembly Replacement .
  2. Remove the fuel injectors. Refer to Fuel Injector Replacement .
  3. Remove the brake booster vacuum hose (1) from the intake manifold (2) and the booster check valve (3).

  4. Object Number: 1551864  Size: SH
  5. Remove the positive crankcase ventilation (PCV) clean air tube from the air intake duct and valve rocker arm cover. Refer to Plastic Collar Quick Connect Fitting Service .

  6. Object Number: 1616429  Size: SH
  7. Remove the PCV foul air tube from the intake manifold and valve rocker arm cover. Refer to Plastic Collar Quick Connect Fitting Service .

  8. Object Number: 1551868  Size: SH
  9. Remove the evaporative emission (EVAP) purge solenoid tube (2) from the solenoid and reposition. Refer to Plastic Collar Quick Connect Fitting Service .

  10. Object Number: 1551867  Size: SH
  11. Disconnect the following electrical connectors:
  12. • EVAP purge solenoid (1)
    • Manifold absolute pressure (MAP) sensor (2)
    • Oil pressure sensor (4)
    • Valve lifter oil manifold (5)

    Object Number: 1411911  Size: SH
  13. Remove the MAP sensor (714) from the intake manifold.

  14. Object Number: 1655017  Size: SH
  15. Remove the EVAP purge solenoid valve and bracket.

  16. Object Number: 1411912  Size: SH
  17. Remove the intake manifold bolts (512).
  18. Remove the intake manifold (500).

  19. Object Number: 1272799  Size: SH
  20. Remove and discard the intake manifold gaskets (514).

Installation Procedure


    Object Number: 1272799  Size: SH
  1. Install the NEW intake manifold gaskets (514).

  2. Object Number: 1411912  Size: SH
  3. Install the intake manifold (500).
  4. Apply a band of threadlock to the threads of the intake manifold bolts (512). Refer to Adhesives, Fluids, Lubricants, and Sealers .
  5. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 63222  Size: SH
  6. Install the intake manifold bolts.
  7. Tighten

        • Tighten the bolts a first pass in sequence to 5 N·m (44 lb in).
        • Tighten the bolts a first pass in sequence to 10 N·m (89 lb in).

    Object Number: 1655017  Size: SH
  8. Install the EVAP purge solenoid bracket and solenoid.

  9. Object Number: 1411911  Size: SH
  10. Install the MAP sensor (714) to the intake manifold.

  11. Object Number: 1551867  Size: SH
  12. Connect the following electrical connectors:
  13. • EVAP purge solenoid (1)
    • MAP sensor (2)
    • Oil pressure sensor (4)
    • Valve lifter oil manifold (5)

    Object Number: 1551868  Size: SH
  14. Position and install the EVAP purge solenoid tube (2) to the solenoid. Refer to Plastic Collar Quick Connect Fitting Service .

  15. Object Number: 1616429  Size: SH
  16. Install the PCV foul air tube to the intake manifold and valve rocker arm cover. Refer to Plastic Collar Quick Connect Fitting Service .

  17. Object Number: 1551864  Size: SH
  18. Install the PCV clean air tube to the air intake duct and valve rocker arm cover. Refer to Plastic Collar Quick Connect Fitting Service .

  19. Object Number: 1551866  Size: SH
  20. Install the brake booster vacuum hose (1) to the intake manifold (2) and the booster check valve (3).
  21. Install the fuel injectors. Refer to Fuel Injector Replacement .
  22. Install the throttle body. Refer to Throttle Body Assembly Replacement .