Avalanche, Sierra, Silverado, C&K Series, 1999-2005

Throttle Body

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WARNING
DO NOT soak the throttle body in a cold immersion type cleaner. The throttle plate has a factory applied sealing compound. DAG material is applied to the outside edge of the plate and the throttle bore to prevent air bypass at closed throttle. Strong solvents or brushing removes the material. To clean the throttle body following disassembly, use a spray type cleaner such as GM X-66A or GM P/N 1052626. Use a shop towel to remove heavy deposits. The TP sensor and the IAC valve are electrical components, and should NOT come in contact with solvent or cleaner in order to avoid damage.


CAUTION
Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

Removal & Installation



4.3L Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine cover.
  4.  
  5. Remove the air cleaner outlet resonator.
  6.  
  7. Remove the air cleaner outlet resonator adapter stud.
  8.  
  9. Remove the cruise control cable.
  10.  
  11. Remove the stud and nuts retaining the accelerator control cable bracket and position bracket aside.
  12.  
  13. Disconnect the Idle air Control (IAC) valve harness connector.
  14.  
  15. Disconnect the Throttle Position (TP) sensor harness connector.
  16.  
  17. Remove the throttle body retaining studs.
  18.  
  19. Remove the throttle body assembly.
  20.  
  21. Discard the throttle body seal.

    Click image to see an enlarged view

    Fig. Exploded view of throttle body, gasket and intake manifold-4.3L engines

  22.  

To install:


CAUTION
Wear safety glasses in order to avoid eye damage.

  1. Clean the gasket surface on the intake manifold.
  2.  
  3. Install the throttle body assembly with a new seal.
  4.  
  5. Install the throttle body assembly retaining studs.
    1. Tighten the studs to 80 inch lbs. (9 Nm).
    2.  

  6.  
  7. Install the air cleaner outlet resonator adapter stud.
    1. Tighten the studs to 71 inch lbs. (8 Nm).
    2.  

  8.  
  9. Connect the TP sensor harness connector.
  10.  
  11. Connect the IAC valve harness connector.
  12.  
  13. Install the accelerator control cable bracket using the fasteners.
    1. Tighten the fasteners to 106 inch lbs. (12 Nm).
      WARNING
      Ensure the accelerator and the cruise control cables do not hold the throttle open.

    2.  

  14.  
  15. Install the accelerator cable.
  16.  
  17. Install the cruise control cable.
  18.  
  19. Install the air cleaner outlet resonator.
  20.  
  21. Install the engine cover.
  22.  
  23. Connect the negative battery cable.
    WARNING
    The accelerator pedal should operate freely without binding between full and closed throttle.

  24.  
  25. Use the following procedure in order to check the accelerator pedal operation.
    1. Depress the pedal to the floor.
    2.  
    3. Release the accelerator pedal.
    4.  

  26.  

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine cover.
  4.  
  5. Remove the air cleaner outlet resonator.
  6.  
  7. Remove the air cleaner outlet resonator adapter stud.
  8.  
  9. Remove the cruise control cable.
  10.  
  11. Remove the stud and nuts retaining the accelerator control cable bracket and position bracket aside.
  12.  
  13. Disconnect the Idle air Control (IAC) valve harness connector.
  14.  
  15. Disconnect the Throttle Position (TP) sensor harness connector.
  16.  
  17. Remove the throttle body retaining studs.
  18.  
  19. Remove the throttle body assembly.
  20.  
  21. Discard the throttle body seal.

    Click image to see an enlarged view

    Fig. Exploded view of throttle body, gasket and intake manifold-4.3L engines

  22.  

To install:


CAUTION
Wear safety glasses in order to avoid eye damage.

  1. Clean the gasket surface on the intake manifold.
  2.  
  3. Install the throttle body assembly with a new seal.
  4.  
  5. Install the throttle body assembly retaining studs.
    1. Tighten the studs to 80 inch lbs. (9 Nm).
    2.  

  6.  
  7. Install the air cleaner outlet resonator adapter stud.
    1. Tighten the studs to 71 inch lbs. (8 Nm).
    2.  

  8.  
  9. Connect the TP sensor harness connector.
  10.  
  11. Connect the IAC valve harness connector.
  12.  
  13. Install the accelerator control cable bracket using the fasteners.
    1. Tighten the fasteners to 106 inch lbs. (12 Nm).
      WARNING
      Ensure the accelerator and the cruise control cables do not hold the throttle open.

    2.  

  14.  
  15. Install the accelerator cable.
  16.  
  17. Install the cruise control cable.
  18.  
  19. Install the air cleaner outlet resonator.
  20.  
  21. Install the engine cover.
  22.  
  23. Connect the negative battery cable.
    WARNING
    The accelerator pedal should operate freely without binding between full and closed throttle.

  24.  
  25. Use the following procedure in order to check the accelerator pedal operation.
    1. Depress the pedal to the floor.
    2.  
    3. Release the accelerator pedal.
    4.  

  26.  

4.3L, 5.0L And 5.7L Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine cover.
  4.  
  5. Remove the air cleaner outlet resonator.
  6.  
  7. Remove the air cleaner outlet resonator adapter stud.
  8.  
  9. Remove the cruise control cable.
  10.  
  11. Remove the stud and nuts retaining the accelerator control cable bracket and position bracket aside.
  12.  
  13. Disconnect the Idle air Control (IAC) valve harness connector.
  14.  
  15. Disconnect the Throttle Position (TP) sensor harness connector.
  16.  
  17. Remove the throttle body retaining studs.
  18.  
  19. Remove the throttle body assembly.
  20.  
  21. Discard the throttle body seal.

    Click image to see an enlarged view

    Fig. Exploded view of throttle body, gasket and intake manifold

  22.  

To install:


CAUTION
Wear safety glasses in order to avoid eye damage.

  1. Clean the gasket surface on the intake manifold.
  2.  
  3. Install the throttle body assembly with a new seal.
  4.  
  5. Install the throttle body assembly retaining studs.
    1. Tighten the studs to 80 inch lbs. (9 Nm).
    2.  

  6.  
  7. Install the air cleaner outlet resonator adapter stud.
    1. Tighten the studs to 71 inch lbs. (8 Nm).
    2.  

  8.  
  9. Connect the TP sensor harness connector.
  10.  
  11. Connect the IAC valve harness connector.
  12.  
  13. Install the accelerator control cable bracket using the fasteners.
    1. Tighten the fasteners to 106 inch lbs. (12 Nm).
      WARNING
      Ensure the accelerator and the cruise control cables do not hold the throttle open.

    2.  

  14.  
  15. Install the accelerator cable.
  16.  
  17. Install the cruise control cable.
  18.  
  19. Install the air cleaner outlet resonator.
  20.  
  21. Install the engine cover.
  22.  
  23. Connect the negative battery cable.
    WARNING
    The accelerator pedal should operate freely without binding between full and closed throttle.

  24.  
  25. Use the following procedure in order to check the accelerator pedal operation.
    1. Depress the pedal to the floor.
    2.  
    3. Release the accelerator pedal.
    4.  

  26.  

4.8L, 5.3L And 6.0L Engines

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

  1. Remove the electrical wire harness connectors from the throttle body.
  2.  
  3. Remove the engine coolant air bleed hose and clamp, if applicable.
  4.  
  5. Remove the throttle body nuts.
  6.  
  7. Remove the throttle body.
  8.  
  9. Remove the throttle body gasket.
  10.  
  11. Discard the gasket.
  12.  
  13. Remove the throttle body studs, if required.

    Click image to see an enlarged view

    Fig. Throttle body-4.8L, 5.3L and 6.0L engines

  14.  

To install:

  1. Install the throttle body studs, if required.
    1. Tighten the throttle body studs to 53 inch lbs. (6 Nm).
      NOTE
      DO NOT use the throttle body gasket again. Install a NEW gasket during assembly.

    2.  

  2.  
  3. Install the new throttle body gasket to the intake manifold.
  4.  
  5. Install the throttle body and nuts.
    1. Tighten the throttle body nuts to 89 inch lbs. (10 Nm).
    2.  

  6.  
  7. Install the engine coolant air bleed hose and clamp to the throttle body, if applicable.
  8.  


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

  1. Remove the electrical wire harness connectors from the throttle body.
  2.  
  3. Remove the engine coolant air bleed hose and clamp, if applicable.
  4.  
  5. Remove the throttle body nuts.
  6.  
  7. Remove the throttle body.
  8.  
  9. Remove the throttle body gasket.
  10.  
  11. Discard the gasket.
  12.  
  13. Remove the throttle body studs, if required.

    Click image to see an enlarged view

    Fig. Throttle body-4.8L, 5.3L and 6.0L engines

  14.  

To install:

  1. Install the throttle body studs, if required.
    1. Tighten the throttle body studs to 53 inch lbs. (6 Nm).
      NOTE
      DO NOT use the throttle body gasket again. Install a NEW gasket during assembly.

    2.  

  2.  
  3. Install the new throttle body gasket to the intake manifold.
  4.  
  5. Install the throttle body and nuts.
    1. Tighten the throttle body nuts to 89 inch lbs. (10 Nm).
    2.  

  6.  
  7. Install the engine coolant air bleed hose and clamp to the throttle body, if applicable.
  8.  

With Electronic Throttle Control (Etc)

WARNING
Handle the electronic throttle control components carefully. Use cleanliness in order to prevent damage. Do not drop the electronic throttle control components. Do not roughly handle the electronic throttle control components. Do not immerse the electronic throttle control components in cleaning solvents of any type.


NOTE
An eight digit part identification number is stamped on the throttle body casting. Refer to this number if servicing, or part replacement is required.

  1. Raise the vehicle.
  2.  
  3. Partially drain the cooling system in order to allow the hoses at the throttle body to be removed.
  4.  
  5. Lower the vehicle.
    NOTE
    Cover or plug any openings when servicing the throttle body in order to prevent possible contamination.

  6.  
  7. Remove the air intake duct.
  8.  
  9. Disconnect the throttle actuator motor harness connector.

    Click image to see an enlarged view

    Fig. Actuator motor harness connector

  10.  
  11. Disconnect the Throttle Position (TP) and Intake Air Control (IAC) sensor harness connector.

    Click image to see an enlarged view

    Fig. Throttle (TP) and air intake control (IAC) harness connector

  12.  
  13. Disconnect the crankcase ventilation hose from the throttle body.
  14.  
  15. Remove the throttle body attaching bolts.
  16.  
  17. Disconnect the coolant hoses from the throttle body.
  18.  
  19. Remove the throttle body and the gasket.
    NOTE
    Do not reuse the throttle body gasket. Install a new gasket during assembly.

  20.  
  21. Discard the throttle body gasket.
  22.  
  23. Inspect the crankcase ventilation hose and the tube. Replace any damaged components.
  24.  

To install:

  1. Install a new throttle body gasket.
  2.  
  3. Connect the coolant hoses to the throttle body.
  4.  
  5. Install the throttle body assembly.
  6.  
  7. Install the throttle body attaching bolts.
  8.  
  9. Tighten the throttle body bolts to 89 inch lbs. (10 Nm).
  10.  
  11. Connect the TP and IAC sensor harness connector.
  12.  
  13. Connect the crankcase ventilation hose to the throttle body.
    NOTE
    Verify that the throttle actuator motor harness connector and the connector seal are properly installed and not damaged.

  14.  
  15. Connect the throttle actuator motor harness connector.
  16.  
  17. Install the air intake duct.
  18.  
  19. Connect the intake air temperature sensor harness connector.
  20.  
  21. Refill the cooling system.
  22.  
  23. Verify that the vehicle meets the following conditions:

    The vehicle is not in a Reduced Engine Power mode.
     
    The ignition switch is ON .
     
    The engine is OFF .
     

  24.  
  25. Connect a scan tool in order to test for a proper throttle-opening and throttle-closing range.
  26.  
  27. Operate the accelerator pedal and monitor the throttle angles. The accelerator pedal should operate freely, without binding, between a closed throttle, and a wide open throttle (WOT).
  28.  
  29. Start the engine.
  30.  
  31. Inspect for coolant leaks.
  32.  

Without Electronic Throttle Control (Etc)
  1. Remove the air intake duct.
  2.  
  3. Disconnect the accelerator control cable and the cruise control cable from the throttle body.
  4.  
  5. Disconnect the vacuum hose from the throttle body.
  6.  
  7. Disconnect the throttle position (TP ) sensor and idle air control (IAC) valve harness connectors.
  8.  
  9. Disconnect the coolant hose from the throttle body.
  10.  
  11. Disconnect the coolant hose from the vapor vent pipe.
  12.  
  13. Remove the throttle body attaching nuts.
  14.  
  15. Remove the throttle body and the gasket. Discard the gasket.
    NOTE
    In order to prevent damage to the sealing surfaces, carefully use sharp tools in cleaning the old gasket from the aluminum surfaces.

  16.  
  17. Clean the gasket sealing surfaces.
  18.  

To install:

  1. Install the throttle body with a new gasket.
  2.  
  3. Install the throttle body attaching nuts.
  4.  
  5. Tighten the nuts to 89 inch lbs. (10 Nm).
  6.  
  7. Connect the coolant hose to the throttle body.
  8.  
  9. Connect the coolant hose to the vapor vent pipe.
  10.  
  11. Connect the accelerator control cable and the cruise control cable to the throttle body.
  12.  
  13. Connect the TP sensor and the IAC valve electrical connectors.
  14.  
  15. Connect the vacuum hose to the throttle body.
  16.  
  17. Install the air intake duct.
  18.  
  19. With the engine OFF, verify that the accelerator pedal moves freely. Depress the accelerator pedal to the floor and release the pedal.
  20.  
  21. In order to reset the IAC valve, perform the following procedure:

    Turn the ignition ON for 10 seconds.
     
    Turn the ignition OFF for 5 seconds.
     

  22.  
  23. Start the engine and check for the proper idle speed.
  24.  

4.8L, 5.3L, 6.0L And 6.2L Engines

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

  1. Remove the electrical wire harness connectors from the throttle body.
  2.  
  3. Remove the engine coolant air bleed hose and clamp, if applicable.
  4.  
  5. Remove the throttle body nuts.
  6.  
  7. Remove the throttle body.
  8.  
  9. Remove the throttle body gasket.
  10.  
  11. Discard the gasket.
  12.  
  13. Remove the throttle body studs, if required.

    Click image to see an enlarged view

    Fig. Throttle body-4.8L, 5.3L, 6.0L and 6.2L engines

  14.  

To install:

  1. Install the throttle body studs, if required.
    1. Tighten the throttle body studs to 53 inch lbs. (6 Nm).
      NOTE
      DO NOT use the throttle body gasket again. Install a NEW gasket during assembly.

    2.  

  2.  
  3. Install the new throttle body gasket to the intake manifold.
  4.  
  5. Install the throttle body and nuts.
    1. Tighten the throttle body nuts to 89 inch lbs. (10 Nm).
    2.  

  6.  
  7. Install the engine coolant air bleed hose and clamp to the throttle body, if applicable.
  8.  

5.7L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the intake air resonator fastener.
  4.  
  5. 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.
  6.  
  7. Disconnect the IAC valve harness connector.
  8.  
  9. Disconnect the TP sensor harness connector.
  10.  
  11. Remove the cruise control cable.
  12.  
  13. Remove the accelerator cable.
  14.  
  15. Remove the cruise control and accelerator cable mounting bracket.
  16.  
  17. Remove the air cleaner adaptor stud.
  18.  
  19. Remove the throttle body fasteners.
  20.  
  21. Remove the throttle body assembly.
  22.  
  23. Remove and discard the flange seal.
  24.  

To install:

  1. Clean the seal surface on the intake manifold.
  2.  
  3. Install a new flange seal.
  4.  
  5. Install the throttle body assembly.
  6.  
  7. Install the throttle body assembly retaining fasteners.
  8.  
  9. Tighten the throttle body retaining fasteners to 80 inch lbs. (9 Nm).
  10.  
  11. Install the air cleaner adaptor stud.
  12.  
  13. Tighten the stud to 72 inch lbs. (8 Nm).
  14.  
  15. Install the accelerator and cruise control cable mounting bracket.
    NOTE
    Make sure the accelerator and cruise control cables are properly routed. Improper routing may cause the throttle plate to remain open.

  16.  
  17. Install the accelerator cable.
  18.  
  19. Install the cruise control cable.
  20.  
  21. Connect the TP sensor harness connector.
  22.  
  23. Connect the IAC valve harness connector.
  24.  
  25. Install the intake air resonator.
  26.  
  27. Tighten the fastener to 22 inch lbs. (2 Nm).
  28.  
  29. Connect the negative battery cable.
    NOTE
    The accelerator pedal should operate freely without binding between closed and full throttle.

  30.  
  31. Depress and release the accelerator pedal to check for binding.
  32.  

7.4L Engines

NOTE
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.

  1. Remove the intake air resonator.
  2.  
  3. Remove the air inlet duct from the throttle body.
  4.  
  5. Disconnect the Idle Air Control (IAC) valve and Throttle Position (TP) sensor electrical connectors.
  6.  
  7. Disconnect the accelerator and cruise control cables.
  8.  
  9. Remove the throttle body retaining nuts.
  10.  
  11. Remove the throttle body assembly.
  12.  
  13. Remove the flange gasket and discard.
  14.  
  15. Clean the gasket surface of the intake manifold.

    Click image to see an enlarged view

    Fig. Throttle body-7.4L engine

  16.  

To install:

  1. Install the new flange gasket.
  2.  
  3. Install the throttle body assembly.
  4.  
  5. Install the throttle body retaining nuts.
    1. Tighten the nuts to 18 ft. lbs. (25 Nm).
    2.  

  6.  
  7. Connect the accelerator and cruise control cables.
  8.  
  9. Connect the IAC valve and TP sensor electrical connectors.
  10.  
  11. Install the air inlet duct to the throttle body.
  12.  
  13. Install the intake air resonator.
  14.  

Disconnect the negative battery cable. Remove the air inlet duct fastener and duct. Disconnect the IAC valve and TP sensor electrical connectors. Disconnect the throttle, and cruise control cables. Remove the accelerator cable bracket bolts and bracket. Remove the wiring harness fastener nut and throttle body retaining studs Remove the throttle body assembly. Remove the flange gasket and discard. Clean the gasket surface of the intake manifold."

To install:

  1. Install the new flange gasket.
  2.  
  3. Install the throttle body assembly.
  4.  
  5. Install the throttle body retaining studs and wiring harness fastener and nuts.
  6.  
  7. Tighten to 18 ft. lbs. (25 Nm).
  8.  
  9. Connect the throttle and cruise control cables.
  10.  
  11. Install the accelerator cable bracket and bolts.
  12.  
  13. Connect the IAC valve and TP sensor electrical connectors.
  14.  
  15. Install the air inlet duct and retaining nut.
  16.  
  17. Tighten the nut to 18 inch lbs. (2 Nm).
  18.  
  19. Connect the negative battery cable.
  20.  
  21. With the engine OFF , check to see that the accelerator pedal is free. Depress the pedal to the floor and release.
  22.  

8.1L Engine

WARNING
Handle the electronic throttle control components carefully. Use cleanliness in order to prevent damage. Do not drop the electronic throttle control components. Do not roughly handle the electronic throttle control components. Do not immerse the electronic throttle control components in cleaning solvents of any type.


NOTE
An 8 digit part identification number is stamped on the throttle body casting. Refer to this number if servicing, or part replacement is required.

  1. Remove the intake air resonator.
  2.  
  3. Disconnect the throttle actuator motor electrical connector.
    NOTE
    Cover or plug any openings when servicing the throttle body in order to prevent possible contamination.

  4.  
  5. Remove the throttle body nuts.
  6.  
  7. Remove the throttle body.
  8.  
  9. Remove and discard the throttle body gasket.

    Click image to see an enlarged view

    Fig. Throttle body-8.1L engine

  10.  

To install:

  1. Install a NEW throttle body gasket.
  2.  
  3. Install the throttle body.
  4.  
  5. Install the throttle body nuts.
    1. Tighten the nuts to 89 inch lbs. (10 Nm).
    2.  

  6.  
  7. Connect the throttle actuator motor electrical connector.
  8.  
  9. Install the intake air resonator.
  10.  
  11. Connect a scan tool in order to test for proper throttle-opening and throttle-closing range.
  12.  
  13. Operate the accelerator pedal and monitor the throttle angles. The accelerator pedal should operate freely, without binding, between a closed throttle, and a wide open throttle (WOT).
  14.  
  15. Verify that the vehicle meets the following conditions:

    The vehicle is not in a reduced engine power mode
     
    The ignition is ON
     
    The ignition is OFF
     

  16.  


NOTE
The vehicle is equipped with Electronic Throttle Control (ETC), the Throttle Position (TP) sensor is NOT serviceable separately from the throttle body. The throttle body and TP sensor MUST be serviced as an assembly.


WARNING
Handle the electronic throttle control components carefully. Use cleanliness in order to prevent damage. Do not drop the electronic throttle control components. Do not roughly handle the electronic throttle control components. Do not immerse the electronic throttle control components in cleaning solvents of any type.


NOTE
An 8 digit part identification number is stamped on the throttle body casting. Refer to this number if replacement is required.

  1. Remove the air induction assembly.
    NOTE
    Cover or plug any openings when servicing the throttle body in order to prevent possible contamination.

  2.  
  3. Disconnect the throttle actuator motor harness connector.
  4.  
  5. Disconnect the throttle position TP sensor harness connector.
  6.  
  7. Remove the throttle body attaching nuts.
    NOTE
    Do not reuse the throttle body gasket. Install a new gasket during assembly.

  8.  
  9. Remove the throttle body and the gasket.
  10.  
  11. Discard the throttle body gasket.
  12.  

To install:

  1. Install a new throttle body gasket.
  2.  
  3. Install the throttle body assembly.
  4.  
  5. Install the throttle body attaching nuts. Tighten the throttle body nuts to 89 inch lbs. (10 Nm).
    NOTE
    Ensure that the electrical connector to throttle body motor and the connector seal are properly installed and not damaged.

  6.  
  7. Connect the TP sensor harness connector.
  8.  
  9. Connect the throttle actuator motor harness connector.
  10.  
  11. Install the air induction assembly.
  12.  
  13. Verify that the vehicle meets the following conditions:

    The vehicle is not in a Reduced Engine Power mode.
     
    The ignition switch is ON .
     
    The engine is OFF .
     

  14.  
  15. Connect a scan tool in order to test for a proper throttle-opening and throttle-closing range.
  16.  
  17. Operate the accelerator pedal and monitor the throttle angles. The accelerator pedal should operate freely, without binding, between a closed throttle, and a wide open throttle (WOT).
  18.  
  19. Start the engine.
  20.  


WARNING
Handle the electronic throttle control components carefully. Use cleanliness in order to prevent damage. Do not drop the electronic throttle control components. Do not roughly handle the electronic throttle control components. Do not immerse the electronic throttle control components in cleaning solvents of any type.


NOTE
An 8 digit part identification number is stamped on the throttle body casting. Refer to this number if servicing, or part replacement is required.

  1. Remove the intake air resonator.
  2.  
  3. Disconnect the throttle actuator motor electrical connector.
    NOTE
    Cover or plug any openings when servicing the throttle body in order to prevent possible contamination.

  4.  
  5. Remove the throttle body nuts.
  6.  
  7. Remove the throttle body.
  8.  
  9. Remove and discard the throttle body gasket.

    Click image to see an enlarged view

    Fig. Throttle body-8.1L engines

  10.  

To install:

  1. Install a NEW throttle body gasket.
  2.  
  3. Install the throttle body.
  4.  
  5. Install the throttle body nuts.
    1. Tighten the nuts to 89 inch lbs. (10 Nm).
    2.  

  6.  
  7. Connect the throttle actuator motor electrical connector.
  8.  
  9. Install the intake air resonator.
  10.  
  11. Connect a scan tool in order to test for proper throttle-opening and throttle-closing range.
  12.  
  13. Operate the accelerator pedal and monitor the throttle angles. The accelerator pedal should operate freely, without binding, between a closed throttle, and a wide open throttle (WOT).
  14.  


WARNING
Handle the electronic throttle control components carefully. Use cleanliness in order to prevent damage. Do not drop the electronic throttle control components. Do not roughly handle the electronic throttle control components. Do not immerse the electronic throttle control components in cleaning solvents of any type.


NOTE
An 8 digit part identification number is stamped on the throttle body casting. Refer to this number if servicing, or part replacement is required.

  1. Remove the intake air resonator.
  2.  
  3. Disconnect the throttle actuator motor electrical connector.
    NOTE
    Cover or plug any openings when servicing the throttle body in order to prevent possible contamination.

  4.  
  5. Remove the throttle body nuts.
  6.  
  7. Remove the throttle body.
  8.  
  9. Remove and discard the throttle body gasket.

    Click image to see an enlarged view

    Fig. Throttle body-8.1L engines

  10.  

To install:

  1. Install a NEW throttle body gasket.
  2.  
  3. Install the throttle body.
  4.  
  5. Install the throttle body nuts.
    1. Tighten the nuts to 89 inch lbs. (10 Nm).
    2.  

  6.  
  7. Connect the throttle actuator motor electrical connector.
  8.  
  9. Install the intake air resonator.
  10.  
  11. Connect a scan tool in order to test for proper throttle-opening and throttle-closing range.
  12.  
  13. Operate the accelerator pedal and monitor the throttle angles. The accelerator pedal should operate freely, without binding, between a closed throttle, and a wide open throttle (WOT).
  14.  

 
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