Removal & Installation (4.2L)
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.
Turn ignition off. Disconnect negative battery cable. Raise and support vehicle. Disconnect knock sensor harness connector(s). See Fig 1. Remove knock sensor retaining bolt and knock sensor. To install, reverse removal procedure. Tighten knock sensor retaining bolt(s) to specification. See TORQUE SPECIFICATIONS .