Knock Sensor 1 Replacement for Chevrolet Express - AWD 2009

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Reposition the knock sensor sleeve down, away from the knock sensor, if equipped.
3. Disconnect the engine wiring harness electrical connector (1) from the knock sensor.



4. Remove the knock sensor bolt and sensor.

Caution: Refer to Fastener Caution in the Preface section.




1. Position the knock sensor to the engine block and install the bolt. Tighten to 25 N·m (18 lb ft)



2. Connect the engine wiring harness electrical connector (1) to the knock sensor.
3. Position the knock sensor sleeve up and over the knock sensor, if equipped.
4. Lower the vehicle.