GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1996 🢒 Seville 🢒 Engine 🢒 Engine Controls - 4.0L and 4.6L 🢒 Throttle Body Assembly Replacement

Throttle Body Assembly Replacement 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: 41528 Size: SH
  1. Remove the negative battery cable.
  2. Remove the air intake duct.

    3. Object Number: 43039 Size: SH
  3. Remove the MAF sensor electrical connector.

    4. Object Number: 19022 Size: SH
  4. Remove the MAF sensor.

    5. Object Number: 43035 Size: SH
  5. Remove the transaxle vent hose from the clip.

    6. Object Number: 18927 Size: SH
  6. Remove the cruise control cable from bracket.
  7. Remove the accelerator cables from bracket

    8. Object Number: 43031 Size: SH
  8. Disconnect the transaxle shift cable.

    9. Object Number: 19016 Size: SH
  9. Remove the accelerator cable from throttle body.
  10. Remove the cruise control cable from throttle body.

    11. Object Number: 43039 Size: SH
  11. Remove the TP sensor connector.
  12. Remove the IAC valve electrical connector.

    13. Object Number: 18590 Size: SH
  13. Remove the throttle body coolant hoses at the throttle body.

    14. Object Number: 18918 Size: SH
  14. Remove the accelerator cable bracket and 2 lower bolts.

    15. Object Number: 19023 Size: SH
  15. Remove the throttle body (1) and gasket (2).

Disassemble Procedure

    Object Number: 18398 Size: SH
  1. Remove the TP Sensor attaching screws (3).
  2. Remove the TP Sensor (2).
  3. Remove the IAC Valve attaching screws (4).
  4. Remove the IAC Valve (1).
  5. Clean the throttle body gasket surfaces.

Assemble Procedure

    Object Number: 18398 Size: SH
  1. Install the IAC valve (1).
  2. Install the TP Sensor (2).

Installation Procedure

Important: 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.

Important: Do Not Reuse the old throttle body gasket.


    Object Number: 19023 Size: SH
  1. Position the new throttle body gasket on throttle body (2).
  2. Install the throttle body (1) to throttle body spacer (3) and finger tighten 2 lower bolts.
  3. Install the accelerator cable bracket to throttle body spacer.

    4. Tighten
    Tighten the throttle body attaching bolts to 12 N·m (106 lb in).


    Object Number: 18590 Size: SH
  4. Install the throttle body coolant hoses at throttle body and surge tank pipe.

    5. Object Number: 43039 Size: SH
  5. Install the IAC valve electrical connectors.
  6. Install the TP sensor electrical connectors.

    7. Object Number: 19016 Size: SH
  7. Install the accelerator control cable at throttle body.
  8. Install the cruise control cable at throttle body.

    9. Object Number: 43031 Size: SH
  9. Install the transaxle shift cable.

    10. Object Number: 18927 Size: SH
  10. Install the cruise control cable to bracket.
  11. Install the accelerator cables to bracket.

    12. Object Number: 43035 Size: SH
  12. Install the transaxle vent hose.

    13. Object Number: 43039 Size: SH
  13. Install the MAF sensor to the throttle body.
  14. Install the MAF sensor electrical connector.

    15. Object Number: 41528 Size: SH
  15. Install the air intake duct.
  16. Install the negative battery cable.
  17. Check and add coolant as necessary. Long life coolant must meet GM Specification 6277-M.
  18. Perform the TP Sensor Learn procedure, if a new throttle body was installed. Refer to DTC P1526 Minimum Throttle Position Not Learned .

Throttle Body Assembly Replacement Idle Learn

A TP Sensor Learn routine has been implemented in the PCM software to allow the PCM to correct or offset the closed throttle signal value of the TP sensor. This is necessary because of manufacturing tolerances during assembly of throttle body, TP sensor manufacture and because the TP sensor is not adjustable on the throttle body. If an improper TP sensor offset is maintained by the PCM, a high idle at closed throttle or stall condition may occur. Performing the TP Sensor Learn procedure lets the PCM learn the correct TP sensor offset.

   • 
Object Number: 18590 Size: SH

Notice:: Make sure nothing is touching or obstructing the accelerator or brake pedals during the TP Sensor Learn procedure because this will prevent the PCM from performing the learn routine. Also ensure that the cruise cable is not holding the throttle open.

  • The TP sensor learn procedure should be performed when:

    • The TP sensor is replaced.

       • 
  • The throttle body is replaced.
    •    • 
  • The PCM is replaced.

    • To perform the TP Sensor Learn:

    0.1. Turn the ignition switch to the ON position, with the engine not running.
    0.2. Wait for 30 seconds.
    0.3. Turn the ignition switch to the Lock position.
    0.4. Wait for 30 seconds.

    Throttle Body Assembly Replacement Spacer

    Removal Procedure

      Object Number: 41527 Size: SH
    1. Relieve fuel system pressure. Refer to Fuel Pressure Relief Procedure .

      2. Object Number: 41528 Size: SH
    2. Remove the air intake duct clamp from the air cleaner assembly.
    3. Remove the intake air duct clamp from the MAF sensor.

      4. Object Number: 154854 Size: SH
    4. Disconnect the transaxle vent hose (2) from the clip attached to the accelerator control cable bracket (1).

      5. Object Number: 19023 Size: SH
    5. Remove the throttle body mount bolts from the throttle body (1).

      6. Refer to Throttle Body Assembly Replacement .

    6. Remove the throttle body. Refer to Throttle Body Assembly Replacement .
    7. Remove the throttle body spacer bolts from the spacer.

      8. Object Number: 53639 Size: SH
    8. Remove the EGR pipe at throttle body spacer.

      9. Object Number: 19023 Size: SH
    9. Remove the crankcase ventilation pipe at the throttle body spacer.
    10. Remove the throttle body spacer (3) and gasket (2) from the intake manifold (4).

      11. Notice: Use care when cleaning the old gasket from the aluminum surfaces in order to prevent damage to the sealing surfaces.

    11. Clean the throttle body gasket surfaces.
    12. Clean the throttle body spacer gasket surfaces.

    Installation Procedure

      Object Number: 19023 Size: SH
    1. Install the throttle body spacer (3).

      2. Tighten
      Tighten the throttle body spacer attaching bolts to 12 N·m (106 lb in).


      Object Number: 53639 Size: SH
    2. Install the EGR pipe to the throttle body spacer.

      3. Tighten
      Tighten the EGR pipe bolt to 28 N·m (21 lb. ft.).

    3. Install the crankcase ventilation pipe at the throttle body spacer.

      4. Object Number: 19023 Size: SH
    4. Install the new gasket (2) and throttle body (1). Refer to Throttle Body Assembly Replacement .

      5. Tighten
      Tighten the throttle body attaching bolts to 12 N·m  (106 lb in).


      Object Number: 43035 Size: SH
    5. Install the transaxle vent hose to clip.

      6. Object Number: 41528 Size: SH
    6. Install the air intake duct.

      7. Tighten
      Tighten the clamps to 3 N·m (27 lb in).

    7. Install the negative battery cable.

    Throttle Body Assembly Replacement Inspection Procedure

    Removal Procedure

      Object Number: 19022 Size: SH

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

    1. Remove the MAF sensor bolts and intake air duct as an assembly.

      2. Object Number: 18590 Size: SH
    2. Inspect the throttle body bore and throttle valve plate for deposits. It is necessary to open the throttle valve to inspect all surfaces.

      3. Notice: Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.

    3. Clean the throttle body bore and throttle valve plate using a clean shop towel with GM Top Engine Cleaner, P/N 1052626 or AC-Delco Carburetor Tune-Up Conditioner, P/N X66-P, or equivalent product.

    Installation Procedure

    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.


      Object Number: 19022 Size: SH
    1. Install the MAF sensor with three bolts and intake air duct as an assembly.

      2. Tighten
      Tighten the MAF sensor attaching bolts to 8 N·m  (71 lb  in.)

      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.

    2. Perform the Throttle Body Assembly Replacement .