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Home >> Buick >> 2006 >> Lucerne CX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 3.8L - Introduction (2 Of 2) >> Repair Instructions >> Knock Sensor 1 Replacement >> Removal Procedure

Removal Procedure

CAUTION: Hot engine coolant may cause severe burns. Although the cooling system has been drained, coolant still remains in the engine water jacket. This coolant will drain with the removal of the knock sensor.
  1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac-N-Fill) .
    2. Fig 1: View Of Engine Harness Electrical Connectors
    GM1686735Courtesy of GENERAL MOTORS CORP.
  2. Disconnect the engine harness electrical connector (1) from the knock sensor.
    3. Fig 2: Identifying Knock Sensor (KS) 1
    GM1694039Courtesy of GENERAL MOTORS CORP.
  3. Remove the knock sensor.
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