Knock Sensor Replacement for Chevrolet Chevrolet C-Series Medium Duty Truck B7 1998

The knock sensor is located to the lower left of the engine block, below the spark plugs.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable.



2. Disconnect the wiring harness connector (2) from the knock sensor (1).
3. Remove the knock sensor from the engine block.

1. Install the knock sensor (1) into the engine block. Apply a water base caulk to the sensor threads. Do not use silicon tape because this will insulate the sensor from the engine block.
2. Connect the wiring harness connector (2) to the knock sensor.
3. Connect the negative battery cable.