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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 974 (Engine Controls - 8.1L (Introduction)) >> Repair Instructions >> Knock Sensor (KS) 1 Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  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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