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Home >> Buick >> 2011 >> Lucerne Super >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 4.6L - Repair Instructions >> Repair Instructions >> Air Cleaner Outlet Duct Replacement >> Removal Procedure

Removal Procedure

    Fig 1: Locating MAF/IAT Sensor Connector
    GM1670786Courtesy of GENERAL MOTORS COMPANY
  1. Disconnect the engine harness electrical connector from the mass air flow (MAF)/intake air temperature (IAT) sensor.
    2. Fig 2: Identifying PCV Fresh Air Tube
    GM1661022Courtesy of GENERAL MOTORS COMPANY
  2. Disconnect the positive crankcase ventilation (PCV) fresh air tube quick connect fitting from the air cleaner outlet duct. Refer to Plastic Collar Quick Connect Fitting Service .
    3. Fig 3: View Of Air Cleaner Outlet Duct To Throttle Body
    GM1670790Courtesy of GENERAL MOTORS COMPANY
  3. Loosen the air cleaner outlet duct clamp at the throttle body.
  4. Remove the air cleaner outlet duct from the throttle body.
    5. Fig 4: View Of Air Cleaner Outlet Duct
    GM1670799Courtesy of GENERAL MOTORS COMPANY
  5. Loosen the air cleaner outlet duct from the MAF/IAT sensor.
  6. Remove the air cleaner outlet duct from the MAF/IAT sensor and the vehicle.
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