GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 DeVille 🢒 Engine 🢒 Engine Controls - 4.6L 🢒 Throttle Body Assembly Replacement

Removal Procedure

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


    Object Number: 522644 Size: SH
  1. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief .
  2. Remove the air cleaner intake duct.
  3. Remove the PCV valve fresh air tube.

    4. Object Number: 104766 Size: SH
  4. Remove the cruise control cable (2) from accelerator controls cable bracket (1).
  5. Remove the accelerator cable (3) from accelerator controls cable bracket (1).
  6. Remove the cruise control cable (2) from throttle body lever.

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

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

    10. Object Number: 574905 Size: SH
  10. Remove the fuel feed and return lines from the retainer (5) on the accelerator controls cable bracket.

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

    12. Object Number: 573468 Size: SH
  12. Remove the throttle body (2) from the water crossover (1).

    13. Object Number: 573471 Size: SH
  13. 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.

    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.


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

    2. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 573468 Size: SH
  2. Position the new throttle body gasket on to the throttle body.
  3. Install bolts from the throttle body (3) to throttle body spacer (1) and finger tighten 2 lower bolts.

    4. Tighten
    Tighten all the bolts to 12 N·m (106 lb in).


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

    6. Object Number: 175378 Size: SH
  6. Install the accelerator control cable (3) at throttle body lever (2).

    7. Object Number: 104766 Size: SH
  7. Install the cruise control cable (2) at throttle body lever.
  8. Install the accelerator cable (3) to the accelerator controls cable bracket (1).
  9. Install the cruise control cable to accelerator controls cable bracket (1).

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

    11. Object Number: 574905 Size: SH
  11. Install the fuel feed and return lines from the retainer (5) on to the accelerator controls cable bracket.
  12. Install the air cleaner intake duct clamp to the air cleaner intake air duct.

    13. Tighten
    Tighten the air cleaner intake duct clamps to 3 N·m (27 lb in).


    Object Number: 522644 Size: SH
  13. Install the PCV valve fresh air tube.
  14. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  15. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  16. Perform the TP Sensor learn procedure.
    17. 16.1. Turn ignition switch to the RUN/ON position.
    16.2. Wait 1 minute.
    16.3. Turn ignition switch to the LOCK/OFF position.
    16.4. Wait 15 seconds.
  17. Perform the IAC Valve learn procedure:
    18. 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.