Removal & Installation (3.8L) Except W Body

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, 2003 Buick Regal, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Hot engine coolant may cause severe burns. Although the cooling system has been drained, coolant still remains in the engine water jacket. This coolant will drain with the removal of the knock sensor.

Turn OFF the ignition. Drain the cooling system. Raise and support the vehicle. Locate Knock Sensor (KS) to be removed. See Fig 1 or Fig 2 . Disconnect the KS electrical connector. Remove the KS.

NOTE: DO NOT apply thread sealant to sensor threads. The sensor is coated at factory and applying additional sealant will affect the sensor's ability to detect detonation.

To install, reverse removal procedure. Tighten the KS to specification. See TORQUE SPECIFICATIONS . Connect the KS electrical connector. Lower the vehicle. Fill the cooling system. See COOLING SYSTEM BLEEDING under COOLING SYSTEM.

Fig 1: Removing/Installing Knock Sensor 1 (3.8L)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Removing/Installing Knock Sensor 2 (3.8L)

Courtesy of GENERAL MOTORS CORP.