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Home › GMC › 2012 › Yukon Hybrid, 4WD › Repair and Diagnosis › Engine Performance › Engine Control Systems › Engine Controls/Fuel - Hybrid (LZ1) - Repair Instructions › Repair Instructions › Knock Sensor 1 Replacement › Removal Procedure

Removal Procedure

    Fig 1: Locating Knock Sensor Electrical Connector & Sleeve
    GM1965285Courtesy of GENERAL MOTORS COMPANY
  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 & Bolt
    GM1402136Courtesy of GENERAL MOTORS COMPANY
  5. Remove the knock sensor bolt (739) and knock sensor (718).
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