Removal Procedure

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Remove the intake manifold. Refer to INTAKE MANIFOLD REPLACEMENT .
Gently pry up the rubber grommets.
Disconnect the knock sensor wire harness electrical connectors.

Fig 1: Disconnecting Knock Sensor Wire Harness Electrical Connectors
Courtesy of GENERAL MOTORS CORP.
Remove the knock sensors.

Fig 2: Removing Knock Sensors
Courtesy of GENERAL MOTORS CORP.
If equipped with the 5.7 L, regular production option (RPO) LS1 engine, remove the engine valley cover bolts.

Fig 3: Removing Engine Valley Cover Bolts (LS1 Engine)
Courtesy of GENERAL MOTORS CORP.
If equipped with the 5.7 L, RPO LS6 engine, remove the engine valley cover bolts.

Fig 4: Removing Engine Valley Cover Bolts (LS6 Engine)
Courtesy of GENERAL MOTORS CORP.
Remove the engine valley cover and gasket.
Discard the engine valley cover gasket.
Remove the knock sensor oil seals (1) from the cover (2).

Fig 5: Removing Knock Sensor Oil Seals
Courtesy of GENERAL MOTORS CORP.
Clean and inspect the engine valley cover. Refer to ENGINE VALLEY COVER CLEANING AND INSPECTION .