GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Notice: Do not damage the MAF sensor screen. A damaged screen could restrict airflow and lead to a driveability concern.


    Object Number: 180378  Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief .

  3. Object Number: 574091  Size: SH
  4. Remove the mass air flow/intake air temperature (MAF/IAT) sensor electrical connector (1) from the MAF/IAT sensor (2).
  5. Remove the air cleaner intake duct assembly (3).

  6. Object Number: 522644  Size: SH
  7. Remove the positive crankcase ventilation (PCV) valve fresh air tube.

  8. Object Number: 595486  Size: SH
  9. Remove the cruise control cable (2) from accelerator controls cable bracket (1).
  10. Remove the accelerator cable (3) from accelerator controls cable bracket (1).
  11. Remove the cruise control cable (2) from throttle body lever.

  12. Object Number: 175378  Size: SH
  13. Remove the accelerator control cable (3) from throttle body lever (2).

  14. Object Number: 574138  Size: SH
  15. Remove the idle air control (IAC) valve electrical connector (1) from the IAC valve (4).
  16. Remove the throttle position (TP) sensor electrical connector (2) from the TP sensor (3).

  17. Object Number: 574958  Size: SH
  18. Remove the transaxle shift cable (1) clip from the accelerator controls cable bracket.

  19. Object Number: 573468  Size: SH
  20. Remove the throttle body (3) bolts from the water crossover (1). Discard plenum duct (2).

  21. Object Number: 573471  Size: SH
  22. Remove the accelerator controls cable bracket bolts (2) from the accelerator controls cable bracket (3).
  23. Remove the accelerator controls cable bracket (3) from the throttle body (1).

Installation Procedure

Notice: Do not use a cleaner which contains methyl ethyl ketone. This extremely strong solvent may damage components and is not necessary for this type of cleaning.

Use a carburetor cleaner in order to remove deposits.

Refer to the instructions provided with the cleaner.

Notice: The outlet of the air cleaner assembly and the MAF sensor inlet duct must line up when completely installed. Misalignment may cause incorrect airflow readings resulting in MIL illumination or a driveability concern. An improperly installed inlet duct assembly or air cleaner assembly may cause misalignment.

Important: Do not reuse the old throttle body gasket or plenum duct.


    Object Number: 573471  Size: SH
  1. Install the accelerator cable bracket (3) to the throttle body (1).
  2. 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.

  3. Install the accelerator cable bracket bolts (2) to the accelerator cable bracket (3).
  4. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 573468  Size: SH
  5. Position the new throttle body gasket on to the throttle body.
  6. Install bolts from the throttle body (3) to the water crossover (1) and new plenum duct (2).
  7. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 574138  Size: SH
  8. Install the IAC valve electrical connector (1) to the IAC valve (4).
  9. Install the TP sensor electrical connector (2) to the TP sensor (3).

  10. Object Number: 175378  Size: SH
  11. Install the accelerator control cable (3) to the throttle body lever (2).

  12. Object Number: 595486  Size: SH
  13. Install the cruise control cable (2) to the throttle body lever.
  14. Install the accelerator cable (3) to the accelerator controls cable bracket (1).
  15. Install the cruise control cable to accelerator controls cable bracket (1).

  16. Object Number: 574958  Size: SH
  17. Install the transaxle shift cable (1) clip to the accelerator controls cable bracket.

  18. Object Number: 574091  Size: SH
  19. Install the MAF/IAT sensor electrical connector (1) to the MAF/IAT sensor (2).
  20. Install the air cleaner intake duct assembly (3).
  21. Tighten
    Tighten the air cleaner intake duct clamps to 3 N·m (27 lb in).


    Object Number: 522644  Size: SH
  22. Install the PCV valve fresh air tube.
  23. Install the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  24. Perform the TP sensor learn procedure.

TP Sensor Learn Procedure

    16.1. Turn the ignition switch to the RUN/ON position.
    16.2. Wait 1 minute.
    16.3. Turn the ignition switch to the LOCK/OFF position.
    16.4. Wait 15 seconds.
  1. Perform the IAC valve learn procedure

IAC Valve Learn Procedure

    17.1. Start and idle the engine for 15 seconds.
    17.2. Turn the ignition switch to the LOCK/OFF position.
    17.3. Wait 15 seconds.
    17.4. Restart the engine , and check for proper idle operation.