S10 Pickup, Sonoma 2000-2004

Throttle Body

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Removal & Installation



2.2L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the air cleaner resonator from the throttle body .
  4.  
  5. Disconnect the electrical connector from the idle air control (IAC) valve.
  6.  
  7. Disconnect the electrical connector from the throttle position (TP) sensor.
  8.  
  9. Remove the vacuum hoses at the throttle body.
  10.  
  11. Remove the accelerator and cruise control cables from the accelerator cable bracket.
  12.  
  13. Remove the accelerator cable bracket.
  14.  
  15. Remove the throttle body attaching bolts.
  16.  
  17. Remove the throttle body from the intake manifold.

    Click image to see an enlarged view

    Fig. Removing/installing throttle body assembly-2.2L engine

  18.  

To install:

  1. Inspect the throttle body gasket, replace as necessary.
  2.  
  3. Install the throttle body.
  4.  
  5. Install the throttle body attaching bolts and tighten to 89 inch lbs. (10 Nm).
  6.  
  7. Install the accelerator cable bracket .
  8.  
  9. Install the throttle and cruise control cables to the throttle body.
  10.  
  11. Install the vacuum hoses to the throttle body.
  12.  
  13. Connect the electrical connector to IAC sensor.
  14.  
  15. Connect the electrical connector to TP sensor.
  16.  
  17. Install the air cleaner resonator to the throttle body.
  18.  
  19. With the engine OFF, check to see that the accelerator pedal is free, by depressing the pedal to the floor and releasing.
  20.  
  21. Connect the negative battery cable.
  22.  
  23. Reset IAC valve pintle position:
    1. Turn ON the ignition, with the engine OFF.
    2.  
    3. Turn OFF the ignition for 10 seconds.
    4.  
    5. Start the engine and inspect for proper idle and throttle operation.
    6.  

  24.  

4.3L Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the air cleaner outlet duct.
  4.  
  5. Remove the air cleaner adapter stud.
  6.  
  7. Disconnect the cruise control cable from the throttle body.
  8.  
  9. Disconnect the accelerator cable from the throttle body.
  10.  
  11. Remove the nuts retaining the accelerator cable routing bracket and position the bracket aside.
  12.  
  13. Remove the stud and nuts retaining the accelerator control cable bracket and position the bracket aside.
  14.  
  15. Disconnect the IAC valve harness connector.
  16.  
  17. Disconnect the TP sensor harness connector.
  18.  
  19. Remove the throttle body retaining studs.
  20.  
  21. Remove the throttle body assembly.
  22.  
  23. Discard the throttle body seal.

    Click image to see an enlarged view

    Fig. Removing/installing throttle body assembly-4.3L engine

  24.  

To install:

  1. Clean the seal 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 and tighten to 80 inch lbs. (9 Nm).
  6.  
  7. Install the accelerator control cable bracket using the mounting stud and nuts and tighten to 106 inch lbs. (12 Nm).
  8.  
  9. Install the accelerator cable routing bracket using the mounting nuts and tighten to 80 inch lbs. (9 Nm).
  10.  
  11. Install the accelerator cable onto the throttle body.
  12.  
  13. Install the cruise control cable onto the throttle body.
  14.  
  15. Connect the TP sensor harness connector.
  16.  
  17. Connect the IAC valve harness connector.
  18.  
  19. Install the air cleaner adapter stud and tighten to 71 inch lbs. (8 Nm).
  20.  
  21. Install the air cleaner outlet duct.
    NOTE
    The accelerator pedal should operate freely without binding between closed and wide open throttle.

  22.  
  23. Connect the negative battery cable.
  24.  
  25. Inspect the accelerator pedal operation as follows:
    1. Turn ON the ignition, with the engine OFF.
    2.  
    3. Use a scan tool in order to observe the parameter for the TP sensor.
    4.  
    5. Depress the accelerator pedal to the floor.
    6.  
    7. Release the accelerator pedal.
    8.  
    9. Verify the throttle position has gone from 0-100 percent and back to 0  percent.
    10.  

  26.  

 
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