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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 357 (Engine Controls And Fuel - Hybrid (LZ1) - Repair Instructions) >> Repair Instructions >> Knock Sensor 1 Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Knock Sensor Electrical Connector And Sleeve
    GM1965285Courtesy of GENERAL MOTORS CORP.
  1. If equipped with 4WD, remove the left front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Left Side .
  2. Remove the left front wheel and tire. Refer to Tire and Wheel Removal and Installation .
  3. Working through the wheel well opening, reposition the engine wiring harness sleeve (3).
  4. Disconnect the engine wiring harness electrical connector (4) from knock sensor.
    5. Fig 2: Left Side Knock Sensor
    GM1402136Courtesy of GENERAL MOTORS CORP.
  5. Remove the knock sensor bolt (739) and knock sensor (718).
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