Removal Procedure

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Knock Sensor Wire Harness

Courtesy of GENERAL MOTORS CORP.

Remove the intake manifold. Refer to Intake Manifold Replacement .
Gently pry up the rubber covers.
Disconnect the knock sensor electrical connectors.

Fig 2: View Of Knock Sensors

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Remove the knock sensors.

Fig 3: View Of Engine Valley Cover, Gasket & Bolts

Courtesy of GENERAL MOTORS CORP.

Remove the engine valley cover bolts.
Remove the engine valley cover and gasket.
Discard the old gasket.

Fig 4: View Of Knock Sensor Oil Seals & Cover

Courtesy of GENERAL MOTORS CORP.

Remove the knock sensor oil seals (1) from the cover (2).
Clean and inspect the engine valley cover. Refer to Engine Valley Cover Cleaning and Inspection .