Envoy, Rainer, Trailblazer 2006-2007

Throttle Body

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Removal & Installation



4.2L Engine
  1. Remove the resonator assembly.
  2.  
  3. Remove the evaporative emission (EVAP) canister purge line from the throttle body.
  4.  
  5. Disconnect the throttle body electrical connector.
  6.  
  7. Remove the throttle body assembly retaining bolts.
  8.  
  9. Remove the throttle body assembly and the gasket from the intake manifold.
  10.  
  11. Clean the gasket surface.
  12.  

To install:

  1. Install the throttle body assembly to the intake manifold with the gasket.
  2.  
  3. Add sealer GM P/N 12346004 (Canadian P/N 10953480) to the throttle control module bolt threads.
  4.  
  5. Install the throttle body assembly retaining bolts. Tighten the bolts to 89 inch lbs. (10 Nm).
  6.  
  7. Connect the throttle body electrical connector.
  8.  
  9. Install the EVAP canister purge line to the throttle body.
  10.  
  11. Install the resonator assembly.
  12.  

5.3L & 6.0L Engines

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.


WARNING
DO NOT for any reason, insert a screwdriver or other small hand tools into the throttle body to hold open the throttle plate, as the throttle body could be damaged.


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. Partially drain the cooling system in order to allow the hose at the throttle body to be removed.
  2.  
  3. Remove the air cleaner outlet duct.
  4.  
  5. Disconnect the throttle actuator motor electrical connector.
  6.  
  7. Reposition the throttle body hose clamp.
  8.  
  9. Remove both of the throttle body engine coolant hoses from the throttle body.
  10.  
  11. Remove the throttle body bolts and nuts.
    NOTE
    Do not reuse the throttle body gasket. Install a new gasket during assembly.

  12.  
  13. Remove the throttle body and gasket. Discard the gasket.
  14.  

To install:

  1. Install a NEW throttle body gasket.
  2.  
  3. Install the throttle body.
  4.  
  5. Install the throttle body bolts and nuts. Tighten the bolts and nuts to 53 inch lbs. (6 Nm).
  6.  
  7. Connect the 2 throttle body engine coolant hoses to the throttle body.
  8.  
  9. Position the throttle body hose clamps.
  10.  
  11. Connect the throttle actuator motor electrical connector.
  12.  
  13. Install the air cleaner outlet duct.
  14.  
  15. Refill the cooling system.
  16.  
  17. Verify that the vehicle meets the following conditions:
    1. The vehicle is not in a reduced engine power mode.
    2.  
    3. The ignition is ON .
    4.  
    5. The engine is OFF.
    6.  

  18.  
  19. Connect a scan tool in order to test for a proper throttle-opening and throttle-closing range.
  20.  
  21. 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).
  22.  
  23. Start the engine.
  24.  
  25. Inspect for coolant leaks.
  26.  

 
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