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Home › Hummer › 2009 › H3 Alpha › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 5.3L - Introduction › Repair Instructions › Knock Sensor 1 Replacement › Removal Procedure

Removal Procedure

    Fig 1: Engine Wiring Harness Electrical Connector & Crankshaft Position (CKP) Sensor Wire Harness
    GM1899640Courtesy of GENERAL MOTORS CORP.
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the engine wiring harness electrical connector (2) from the knock sensor (1).
    3. Fig 2: Left Side Knock Sensor & Bolt
    GM1402136Courtesy of GENERAL MOTORS CORP.
  3. Remove the knock sensor bolt (739) and sensor (718).
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