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Removal Procedure

Fig 1: View Of Knock Sensor (KS) 1 Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Drain the cooling system/engine block. Refer to Draining and Filling Cooling System in Engine Cooling.
Disconnect the knock sensor electrical connector (4).

Fig 2: View Of Knock Sensor (KS) 1

Courtesy of GENERAL MOTORS CORP.

Remove the knock sensor.