GM 12623730
Knock Sensor

In order to change the knock sensor, first, lift the vehicle. Next, disconnect the knock sensor harness connector and remove the knock sensor retaining bolt. Then remove the proper knock sensor (1 or 2). For installation, make sure to abide by the Component Fastener Tightening Notice. Clip in the new knock sensor (1 or 2), using the bolt tighten the sensor to 25 N.m (18 lb ft). Finally, reconnect the knock sensor harness connector and lower the vehicle.

Before starting a new sensor replacement for Bank 1, you need to elevate and secure the vehicle. The repair starts with disconnecting the radiator air baffle and removing the engine harness electrical connector from the knock sensor. First remove the bank 1 knock sensor then loosen its mounting. Use the factory coating on the new bank 1 knock sensor without applying thread sealant since it provides proper functioning without additional materials. Sealant applied in excess will restrict the sensor from detecting detonation incidents. Secure the sensor at 25 N.m (18 lb ft) before you reconnect the engine harness electrical connector to the knock sensor. Reinstall the radiator air baffle then proceed with lowering the vehicle.

Begin sensor replacement for Bank 2 by raising and supporting the vehicle first. Disconnect and remove the left knock sensor from its harness electrical connector. Apply thread sealant to the sensor threads because factory coats protect the sensor but additional sealant can interfere with the sensor's detonation detection. Use 25 N.m (18 lb ft) torque when fastening the knock sensor into position. Dual hand steps allow technicians to lower the vehicle. They should reconnect the engine harness electrical connector to the left knock sensor before completing the procedure.

You must remove the right front wheel and tire before replacing Knock Sensor 2. Work through the wheel well opening by disconnecting the engine wiring harness electrical connector from the knock sensor. Proceed by removing bolt 739 and sensor 718. Position the knock sensor (718) onto the engine block before installing the knock sensor bolt (739) with a torque of 25 N.m (18 lb ft). As the last step, restore the right front wheel and tire while reconnecting the engine wiring harness electrical connector to the knock sensor.

Knock Sensor 1 needs replacement by taking off first the left front wheel as well as tire. Follow the wheel well entry to move the engine wiring harness sleeve into position then disconnect the knock sensor's connection to the engine wiring harness electrical connector. Start by dismantling the knock sensor bolt (739) and subsequent removal of the knock sensor (718). Installation requires the knock sensor (718) to be positioned on the engine block then the knock sensor bolt (739) should be installed and torqued to 25 Nm (18 lb ft). Secure the engine wiring harness electrical connector to the knock sensor then guide the engine wiring harness sleeve across the electrical branch. Screw the left front wheel along with its tire back into place.

Start by removing the Intake Manifold in order to replace Knock Sensor 1. First disconnect the electrical connector from the Knock Sensor (KS) then remove its central bolt. Remove Knock Sensor 1 from its block position in the engine. The cleaning process of the ks mating surfaces should include full contact between the ks and engine block surfaces. You should never install washers or spring washers or toothed washers to the system during the installation process. Screw the bolt until it reaches the specified torque. Screw the ks into place along with the bolt on the engine block while tightening the ks bolt to 20 n.m (15 lb ft). Link the ks wiring harness correctly and connect the electrical connector to the ks before reinstallation of the Intake Manifold.

You must start by taking off the left front wheel together with its tire in order to replace Knock Sensor 1. Through the wheel well opening disconnect the engine wiring harness electrical connector from the knock sensor. The Knock Sensor (718) requires removal with the Knock Sensor Bolt (739). Install the knock sensor (718) against the engine block while installing the knock sensor bolt (739) which requires tightening to 25 N.m (18 lb ft). Reinstall the left front wheel along with its tire after connecting the engine wiring harness electrical connector to the knock sensor.

Start by eliminating the Intake Manifold before replacing Knock Sensor 2. Remove both the electrical connector which connects to the Knock Sensor (KS) and the central bolt securing the ks. Remove Knock Sensor 2 from its position inside the engine block. Clean both the ks mating surfaces and engine block together before placing the entire ks surface directly on the engine block. The installation requires a bolt torque of 20 n.m (15 lb ft) after tightening. Attach ks to the engine block alongside its bolt while making sure that ks wiring harness stays protected by the retaining clips. Connect the electrical connector to the ks then reinstall the Intake Manifold as the final step.

In order to replace the knock sensor (KS), raise and support the vehicle just enough to get the KS through the wheelhouse and pull out the left wheel house liner. Before you take the KS out of the engine block, disconnect the engine wire harness electrical connector from the KS and remove the KS retaining bolt. For installation; make sure you install the KS and the retaining bolt back on the engine block with the electrical terminals located rearward; and to tighten the knock sensor (KS) bolt to 25 N.m (18 lb ft). Next, plug back the engine wiring harness electrical connector to the KS, reinstall the left wheelhouse liner, lowering the vehicle, lastly.

Before installing a new right Knock Sensor professionals need to remove the right Exhaust Manifold (6.0L) and the right Catalytic Converter (6.0L) from the system. Gaining access to the Knock Sensor requires stripping away the Starter assembly if needed. You should begin by removing the Knock Sensor along with its mounting from the engine block . Disconnect the engine electrical connector from the Knock Sensor before taking it out completely. Reconnect the electrical connector to the Knock Sensor before mounting the sensor on the engine block and securing it with a 20 n.m (15 lb ft) torque. Reinstall the Starter assembly if it was taken out at some point during the repair. You should install the right Exhaust Manifold (6.0L) along with the right Catalytic Converter (6.0L). Program the transmitters after battery connectivity when necessary.

Start by elevating the vehicle before removing the knock sensor (KS). You need to detach the knock sensor (KS) electrical connector before removing the securing bolt and the KS device. Installation should avoid using thread lockers on sensor threads because factory coatings exist and extra thread lockers might interfere with detonation detection ability. Attach the KS to its designated spot on the engine block while tightening the KS bolt to 25 N.m (18 lb ft). Lower the vehicle while finishing by reconnecting the KS electrical connector.

The procedure starts by recording the preset radio station followed by turning the ignition off and disconnecting the negative Battery Cable. Start by disconnecting the ks harness connector after you slide a flat-bladed screwdriver under the ks connector to free it from the retaining clip. Insert the ks pigtail connector with retaining clip into the Intake Manifold hole taking care of direction. Alternatively slide the pigtail over the retaining clip from its top position. Replace the new ks pigtail connector retaining clip on the Intake Manifold by using a push pin removal tool to extract the old one. Check that the ks harness connector connects securely by applying force to the back of the harness. Fix the ks in its 9 o'clock position then bolt it down while making sure the engine block receives the ks's bigger metal contact area to prevent dtc p0325. After installing the new ks pigtail connector retaining clip you should fasten the Knock Sensor-to-engine block bolt to 25 n.m (18 lb ft) and reconnect the negative Battery Cable then secure the battery terminal bolts to 17 n.m (13 lb ft). The last step includes resetting the clock and preset radio stations.

The procedure starts by removing both right front tire and wheel before proceeding to remove the inner wheel well. First remove the knock sensor (KS) retaining bolt before taking out both the KS and its connecting electrical wire. Install the Knock Sensor (KS) by connecting the electrical connector, placing the KS in position on the engine block, and securing the KS retaining bolt at 20 N.m (15 lb ft) torque following Service Precautions Fastener Notice. The right wheelhouse liner and right front tire with wheel assembly must be put back in place as the final step.

Begin the Knock Sensor 2 replacement process by lifting your vehicle properly above the ground. Choose the engine wiring harness electrical connector and cut it off from the knock sensor followed by removing both the knock sensor bolt (739) and the knock sensor (718). The knock sensor (718) must be placed onto the engine block while installing the knock sensor bolt (739) with a recommended torque of 25 Nm (18 lb ft). Reattach the engine wiring harness electrical connector to the knock sensor.

Start by correctly elevating and supporting the vehicle before beginning sensor knock 1 replacement. When necessary you should first detach and remove the oil pan skid plate along with its retaining bolts. Begin by removing the protective bolt of the knock sensor and the insulation before aligning the buckle of the timing chain in such a position. As for the installation, ensure the timing chain is below the knock sensor point. The first step involves disconnecting the electrical connector from the engine wiring harness which serves the knock sensor and using a socket wrench to remove both the bolt and sensor from its block. Position the knock sensor to the front section of the engine block before fixing it with a bolt that reaches 25 Nm (18 lb ft). Connect the engine wiring harness electrical connector to the knock sensor position the knock sensor sleeve in proper placement over the knock sensor. Secure the knock sensor heat shield onto the engine block after setting the bolt at a torque level of 10 Nm (89 lb in). After replacing the skid plate users should return the vehicle to its initial position and secure all corresponding bolts at a torque of 28 Nm (21 lb ft).

To replace knock sensor on the left, there is first removing the knock sensor mounting bolt for it. Next, open the knock sensor electrical connector from the engine harness by unhooking it. Next, take the knock sensor off the engine block. A disconnect will also need to be seen with the reconnection of the electrical connectors of the engine harness and the knock sensor. Mount the knock sensor on the engine block and screw the mounting bolt of the knock sensor. Last but not least, fasten the knock sensor mounting bolt to torque reading as at 20 N.m (15 lb ft).

Begin bank 2 Knock Sensor replacement work by taking off the right front tire followed by removing the wheel. First remove the splash shield and disconnect the engine harness electrical connector from the Knock Sensor point. The bank 2 Knock Sensor must be loosened before removal. The production pre-coating of threads on bank 2 Knock Sensor requires no thread sealant during installation for optimum detonation detection. Torque the Knock Sensor to 25 n.m (18 lb ft) before you reattach the engine harness electrical connector to the sensor. Put on both the splash shield and right front tire and wheel as the final step.

To replace Knock Sensor 2 start by removing the right front wheelhouse liner when there is 4WD in the vehicle. Then remove the right front wheel and tire. Remove plug connecting the engine wiring harness of the knock sensor from the wheel well opening. Remove the knock sensor bolt (739) and knock sensor (718). For installation of the knock sensor (718), place it on top of the engine block. Tighten it to the knock sensor bolt by using a torque of 25 Nm (18 lb ft). Reconnect the engine wiring harness electrical connector back to the knock sensor; then, reinstall the right front wheel and tire. Last, if you were removed, recheck the right front wheelhouse liner.

Vehicle owners with 4WD should start by removing the left front wheelhouse liner during Knock Sensor 1 replacement. Start by removing the left front wheel with its tire from the vehicle. Move the engine wiring harness sleeve to inside the wheel well and unplug the engine wiring harness electrical connector which connects to the knock sensor. Begin by unscrewing bolt 739 from knock sensor (718). Position the knock sensor (718) onto the engine block and tighten it to 25 Nm (18 lb ft) through the knock sensor bolt (739). Secure the knock sensor with its bolt after reattaching the engine wiring harness electrical connector to the knock sensor. Then cover the connector with the engine wiring harness sleeve. To complete the installation put back the left front wheel and tire then install the left front wheelhouse liner if it was removed.

The vehicle requires support before starting replacements on Knock Sensor 2. Disconnect the engine wiring harness electrical connector from the knock sensor while removing the knock sensor bolt (739) and the knock sensor (718). Position the knock sensor (718) to the engine block finally install the knock sensor bolt (739) and tighten it to 25 Nm (18 lb ft). Connect the engine wiring harness electrical connector to the knock sensor as the final step.

Connect the knock sensor wiring harness electrical connector and reinstall the heat shield and bolts, tightening them to 60 N.m (44 lb ft).

Do not apply thread sealant to the sensor threads, as it is factory-coated and additional sealant will impair its ability to detect detonation.

No, do not apply thread sealant as the sensor threads are pre-coated at the factory.

Disconnect the KS electrical connector.

Reconnect the engine harness electrical connector to the knock sensor and fill the cooling system.

Raise and support the vehicle.

Reconnect the engine harness electrical connector to the right knock sensor and lower the vehicle.

Tighten the sensor to 25 N.m (18 lb ft).

Connect the knock sensor wiring harness electrical connector and lower the vehicle.

Reconnect the engine harness electrical connector to the right knock sensor and the left knock sensor, if required, before lowering the vehicle.

The cylinder heads are shown removed for clarity.

Reconnect the KS electrical connector and reinstall the wiring harness heat shield to the oil level indicator tube.

First, remove the intake manifold.

First, remove the intake manifold.

Remove the KS bolt before taking out the KS.

Disconnect the electrical connector from the knock sensor (KS) and remove the bolt in the center of the KS.

First, remove the supercharger assembly.

Disconnect the electrical connector from the knock sensor (KS) and remove the bolt in the center of the KS.

Place the new KS in position, ensuring to follow the Fastener Notice for proper guidelines.

Disconnect the knock sensor (KS) electrical connector and remove the KS bolt before taking out the KS.

Disconnect the KS electrical connector.

Reinstall the wiring harness heat shield onto the oil level indicator tube and lower the vehicle.

No, it is important not to use washers, spring washers, or toothed washers during installation.

Turn the ignition OFF and raise and support the vehicle.

First, remove the supercharger assembly.

Remove the left wheelhouse liner.

Raise and support the vehicle.

Install the mounting bolt for the knock sensor.

Disconnect the knock sensor (KS) electrical connector.

Reconnect the engine harness and the knock sensor electrical connectors, position the knock sensor on the engine block, and install the mounting bolt for the knock sensor.

Follow the Fastener Notice.

Raise and support the vehicle.

Remove the mounting bolt for the knock sensor and disconnect its electrical connector from the engine harness.

Reconnect the engine harness and the knock sensor electrical connectors.

Detach the knock sensor mounting and remove the knock sensor 2 from the engine block by disconnecting the engine electrical connector.

Torque the sensor to 20 N.m (15 lb ft).

Reconnect the left knock sensor electrical connector.

Disconnect the left knock sensor electrical connector.

Loosen and remove the knock sensor.

Insert the KS pigtail connector with the retaining clip into the intake manifold hole or slide it over the retaining clip from the top.

Finally, fill the cooling system.

Raise and support the vehicle.

Reconnect the right knock sensor electrical connector.

Lower the vehicle.

Remove the knock sensor bolt and the sensor itself.

Disconnect the right knock sensor electrical connector.

Remove the knock sensor jumper wire electrical connector rosebud clip from the oil level indicator tube tab, loosen the knock sensor bolt, and then remove the knock sensor.

Take out the sensor itself.

Remove the oil pan skid plate and its bolts.

Additional sealant can affect the sensor's ability to detect detonation.

Finally, connect the electrical connector to the knock sensor.

Disconnect the engine harness electrical connector from the knock sensor.

Take out the appropriate knock sensor (1 or 2).

Ensure to position the electrical terminals of the KS rearward when installing it back onto the engine block.

Position the knock sensor to the engine block and install the bolt, tightening it to 25 N.m (18 lb ft).

Raise and support the vehicle just high enough to access the KS through the wheelhouse.

Attach the knock sensor heat shield to the engine block and install the bolt, tightening it to 10 Nm (89 lb in).

Disconnect the engine wiring harness electrical connector from the knock sensor.