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Home › Chevrolet › 2004 › TrailBlazer 4.2 S, RWD › Repair and Diagnosis › Engine Performance › System › Engine Control System - 4.2L (Introduction) › Repair Instructions › Knock Sensor (KS) Replacement › Removal Procedure

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
    2. Fig 1: Removing/Installing Knock Sensors
    GM727528Courtesy of GENERAL MOTORS CORP.
  2. Remove the knock sensor harness connector (4).
  3. Remove the knock sensor retaining bolt (3).
  4. Remove the appropriate knock sensor (1 or 2).
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