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Home >> Hummer >> 2005 >> H2 4D Utility Pickup >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Introduction >> Repair Instructions >> Throttle Body Assembly Replacement >> Removal Procedure
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Removal Procedure

    Fig 1: MAF/IAT Sensor & Air Cleaner Assembly
    GM832908Courtesy of GENERAL MOTORS CORP.
    NOTE: 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.
    IMPORTANT: 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 hoses at the throttle body to be removed. Refer to Draining and Filling Cooling System in Engine Cooling.
    2. IMPORTANT: Cover or plug any openings when servicing the throttle body in order to prevent possible contamination.
  2. Remove the air intake duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
    3. Fig 2: View Of Throttle Body & Nuts
    GM825837Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the throttle actuator motor harness connector.
  4. Disconnect the coolant hoses from the throttle body.
  5. Remove the throttle body attaching bolts.
  6. Remove the throttle body and the gasket.
    7. IMPORTANT: Do not reuse the throttle body gasket. Install a new gasket during assembly.
  7. Discard the throttle body gasket.
  8. Inspect the crankcase ventilation hose and the tube. Replace any damaged components.
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