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Home >> Hummer >> 2009 >> H2 4D Utility Pickup >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.2L - Introduction >> Repair Instructions >> Throttle Body Assembly Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: View Of Throttle Body & Nuts
    GM825837Courtesy of GENERAL MOTORS CORP.
  1. Install a new throttle body gasket.
  2. Install the throttle body assembly.
    3. CAUTION: Refer to Fastener Caution .
    NOTE: Always use a torque wrench in order to obtain the proper torque.
  3. Install the throttle body attaching bolts.

    Tighten:  Tighten the throttle body bolts to 10 N.m (89 lb in).

  4. Connect the coolant hoses to the throttle body.
    5. NOTE: Verify that the TAC harness connector and the connector seal are properly installed and not damaged.
  5. Connect the TAC harness connector.
    6. Fig 2: View Of MAF/IAT Sensor & Air Cleaner Assembly
    GM832908Courtesy of GENERAL MOTORS CORP.
  6. Install the air intake duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  7. Connect the intake air temperature sensor harness connector.
  8. Refill the cooling system. Refer to Cooling System Draining and Filling (Vac-N-Fill) or Cooling System Draining and Filling (Static Fill) .
  9. Verify that the vehicle meets the following conditions:
    • The vehicle is not in a Reduced Engine Power mode.
    • The ignition is ON.
    • The engine is OFF.
  10. Connect a scan tool in order to test for a proper throttle-opening and throttle-closing range.
  11. 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).
  12. Start the engine.
  13. Inspect for coolant leaks.
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