Silverado 2008

Throttle Body

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Removal & Installation



4.3L Engines

Specific to:

Chevrolet Silverado 1500 2008

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the air cleaner assembly.

    Click image to see an enlarged view

    Fig. Air cleaner outlet resonator assembly-4.3L engines

  6.  
  7. Disconnect the engine wiring harness electrical connector from the throttle actuator.
  8.  
  9. Remove the throttle body retaining bolts.
  10.  
  11. Remove the component from its mounting.

    Click image to see an enlarged view

    Fig. Throttle body and related components-4.3L engines

  12.  

To install:


NOTE
Be sure to use new fasteners, as required.

  1. Position a new throttle body gasket on the upper intake manifold.
  2.  
  3. Install the throttle body to its mounting.
  4.  
  5. Tighten the retaining bolts to 89 inch lbs. (10 Nm).
  6.  
  7. Continue the installation in the reverse order of the removal procedure.
  8.  
  9. Perform the throttle idle learn procedure.
    NOTE
    Using the GM diagnostic scan tool, or equivalent, refer to the on-screen reprogramming directions and perform the throttle/idle learn procedure.

  10.  
  11. With the ignition ON and the engine OFF, perform the idle learn reset in mode setup, using the scan tool.
  12.  
  13. Start the engine and monitor the TB Idle Airflow Compensation parameter.
  14.  
  15. The value should equal zero percent and the engine should be idling at a normal idle speed.
  16.  
  17. Clear any DTC-s.
  18.  

4.8L, 5.3L & 6.0L Engines

Specific to:

Chevrolet Silverado 1500 2008

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the air cleaner assembly.

    Click image to see an enlarged view

    Fig. Air cleaner outlet resonator assembly-4.8L, 5.3L & 6.0L engines

  6.  
  7. Disconnect the electrical connector.
  8.  
  9. Disconnect the vacuum hoses, if equipped.
  10.  
  11. Remove the throttle body retaining nuts.
  12.  
  13. Remove the component from its mounting. Discard the gasket.

    Click image to see an enlarged view

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

  14.  

To install:


NOTE
Be sure to use new fasteners, as required.


NOTE
DO NOT use the throttle body gasket again. Install a NEW gasket during assembly.

  1. Position a new throttle body gasket on the upper intake manifold.
  2.  
  3. Install the throttle body to its mounting.
  4.  
  5. Tighten the retaining nuts to 89 inch lbs. (10 Nm).
  6.  
  7. Continue the installation in the reverse order of the removal procedure.
  8.  
  9. Perform the throttle idle learn procedure.
    NOTE
    Using the GM diagnostic scan tool, or equivalent, refer to the on-screen reprogramming directions and perform the throttle/idle learn procedure.

  10.  
  11. With the ignition ON and the engine OFF, perform the idle learn reset in mode setup, using the scan tool.
  12.  
  13. Start the engine and monitor the TB Idle Airflow Compensation parameter.
  14.  
  15. The value should equal zero percent and the engine should be idling at a normal idle speed.
  16.  
  17. Clear any DTC-s.
  18.  

 
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