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Home >> GMC >> 2004 >> Sierra 2500 HD, 2D Pickup, 8.1 G, RWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 8.1L (Introduction) >> Repair Instructions >> Knock Sensor (KS) 1 Replacement >> Removal Procedure

Removal Procedure

  1. Drain the cooling system/engine block. Refer to Draining and Filling Cooling System (with HP2) or Draining and Filling Cooling System (without HP2) in Engine Cooling.
  2. Disconnect the knock sensor electrical connector (4).
    Fig 1: Knock Sensor (KS) 1 Electrical Connector
    GM1236369Courtesy of GENERAL MOTORS CORP.
    3. Fig 2: Knock Sensor (KS) 1
    GM858224Courtesy of GENERAL MOTORS CORP.
  3. Remove the knock sensor.
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