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Removal & Installation (8.1L)

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The 8.1L is equipped with 2 knock sensors. See Figure and Fig 1 . Raise and support vehicle. Disconnect Appropriate knock sensor harness connector. Remove knock sensor. To install, reverse removal procedure. Tighten knock sensors to specification. See TORQUE SPECIFICATIONS . Fill and bleed cooling system. See COOLING SYSTEM BLEEDING  under COOLING SYSTEM.

Fig 1: Locating Bank No. 2 Knock Sensor (8.1L)
G00156238Courtesy of GENERAL MOTORS CORP.