Removal (5.3L)

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The 5.3L has 2 knock sensors, located under intake manifold.

Remove the intake manifold. See INTAKE MANIFOLD under AIR INDUCTION SYSTEMS. Gently pry up the knock sensor rubber covers. See Fig 1. Disconnect knock sensor harness connectors. Remove knock sensors. See Fig 2.

Fig 1: Disconnecting Knock Sensor Harness Connectors (5.3L)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Locating Knock Sensors (5.3L)

Courtesy of GENERAL MOTORS CORP.