GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Important: An 8 digit part identification number is stamped on the bottom of the throttle body casting. Refer to this number if servicing or part replacement is required.


    Object Number: 308131  Size: SH
  1. Remove the intake air resonator fastener.

  2. Object Number: 308130  Size: SH
  3. Remove the intake air resonator from the throttle body by pivoting the intake air resonator upward until the hinge clip releases from the lip on the throttle body.

  4. Object Number: 312513  Size: SH
  5. Disconnect the IAC valve harness connector.

  6. Object Number: 12885  Size: SH
  7. Disconnect the TP sensor harness connector.

  8. Object Number: 325550  Size: SH
  9. Remove the cruise control cable.

  10. Object Number: 325556  Size: SH
  11. Remove the accelerator cable.
  12. Remove the cable mounting bracket.

  13. Object Number: 424550  Size: SH
  14. Remove the air cleaner adaptor stud.

  15. Object Number: 442105  Size: SH
  16. Remove the throttle body fasteners.

  17. Object Number: 442103  Size: SH
  18. Remove the throttle body assembly.
  19. Remove and discard the flange seal.

Installation Procedure

  1. Clean the seal surface on the intake manifold.

  2. Object Number: 442103  Size: SH
  3. Install a new flange seal.
  4. Install the throttle body assembly.

  5. Object Number: 442105  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  6. Install the throttle body assembly retaining fasteners.
  7. Tighten
    Tighten the throttle body retaining fasteners to 9 N·m (80 lb in.).


    Object Number: 424550  Size: SH
  8. Install the air cleaner adaptor stud.
  9. Tighten
    Tighten the stud to 8N·m (72 lb in.).

  10. Install the cable mounting bracket.

  11. Object Number: 325556  Size: SH

    Important: Make sure the accelerator and cruise control cables are properly routed. Improper routing may cause the throttle plate to remain open.

  12. Install the accelerator cable.

  13. Object Number: 325550  Size: SH
  14. Install the cruise control cable.

  15. Object Number: 12885  Size: SH
  16. Connect the TP sensor harness connector.

  17. Object Number: 12886  Size: SH
  18. Connect the IAC valve harness connector.

  19. Object Number: 308130  Size: SH
  20. Install the intake air resonator.
  21. Tighten
    Tighten the fastener to 2 N·m (18 lb in.).

    Important: The accelerator pedal should operate freely without binding between closed and full throttle.

  22. Depress and release the accelerator pedal to check for binding.