GM 10456555
Crankshaft Position Sensor

Start by supporting the vehicle at a height while removing the lower air deflector to replace the Crankshaft Position (CKP) Sensor (24X). Disconnect the sensor's electrical connection and extract the sensor from its bracket before removing the crankshaft balancer. Record the harness route and remove the bolt securing the harness together with its clip. First disconnect the bolts that secure the CKP sensor before removing the sensor itself. During installation fit the 24X crankshaft position sensor to the front cover while tightening the CKP sensor bolts to a torque of 10 N.m (89 lb in). First install the harness retaining clip with its bolt making sure the bolt torque reaches 10 N.m (89 lb in). First install the CKP sensor electrical connector before mounting the bracket with CKP sensor harness. Finally replace the crankshaft balancer and lower air deflector. The procedure to learn variation for the crankshaft position (CKP) system should be conducted after vehicle lowering is complete.

Starting by turning the ignition off, begin the crankshaft position (CKP) sensor (24X) replacement process by removing the serpentine Drive Belt from the Crankshaft Pulley. Start by lifting the vehicle on a hoist before removing the retaining bolt holding the Harmonic Balancer in place. Remove the balancer from its spot afterward. Record the sensor harness routing before unclipping with bolt and removing its electrical connector. The sensor bolts need removal followed by sensor extraction. The installation process involves placing the 24x Crankshaft Position Sensor with bolts while guiding the harness according to removal routing. The harness retaining clip requires installation with bolt while tightening bolts to 10 nm (8 lb ft). Connect the sensor electrical connector, reinstall the balancer on the crankshaft, and apply thread sealer gm #1052080 or equivalent to the threads of the crankshaft Harmonic Balancer bolt, tightening it to 150 nm (110 lb ft). After lowering the vehicle you must reinstall the serpentine Drive Belt then run the ckp system variation learn procedure.

Connect the CKP sensor electrical connector.

Place the 24X crankshaft position sensor back in position using bolts and route the harness as noted during removal.

The CKP sensor electrical connector.

Release the throttle immediately when the engine starts to decelerate, allowing the engine control to return to the operator.

Install the 24X Crankshaft Position Sensor with bolts and route the harness as noted during removal.

Place the 24X crankshaft position sensor with bolts and route the harness as noted during removal.

Reinstall the harness retaining clip with a bolt, ensuring to tighten the bolts to 10 N.m (89 lb in).

Remove the crankshaft harmonic balancer.

Lubricate the O-ring with clean engine oil and replace it if damaged.

Place the sensor and secure it with bolts, ensuring the harness is routed as noted during removal.

Reinstall the crankshaft balancer and perform the crankshaft variation learn procedure.

Disconnect the CKP sensor, then remove the attaching bolt and take the sensor out of the engine.

Install the harness retaining clip with a bolt and tighten the bolts to 10 N.m (88 lb in).

Remove the CKP sensor bolts and then take out the CKP sensor.

Reconnect the CKP sensor electrical connector, reinstall the right front wheel, and lower the vehicle.

Tighten it to 11 N.m (97 lb in).

Lubricate the O-ring with clean engine oil and replace it if damaged.

Connect the sensor electrical connector and lower the vehicle.

Remove the crankshaft harmonic balancer and note the routing of the sensor harness before removal.

Place the 24X crankshaft position sensor back in position with the bolts, ensuring the harness is routed as previously noted.

Turn OFF the ignition and raise the vehicle on a hoist.

Block the drive wheels, apply the vehicle's parking brake, cycle the ignition from OFF to ON, apply and hold the brake pedal, start and idle the engine, turn OFF the A/C, and place the vehicle's transmission in Park (A/T) or Neutral (M/T).

Put back the right inner fender access cover and the right front wheel and tire assembly, tightening the wheel nuts to 140 N.m (104 lb ft).

Disconnect the CKP sensor electrical connector.

Remove the CKP sensor bolts and then take out the CKP sensor.

Tighten it to 11 N.m (97 lb in).

Install the harness retaining clip with bolt and tighten the CKP sensor bolts to 10 N.m (89 lb in).

Lubricate the O-ring with clean engine oil and replace it if damaged.

Raise the vehicle on a hoist and remove the right front Tire and Wheel assembly, followed by the right front engine splash shield.

Perform the CKP System Variation Learn Procedure.

Observe the fuel cut-off for the engine in question.

Install the harness retaining clip with the bolt, tightening the bolts to 10 N.m (89 lb in).

Reinstall the harness retaining clip with the bolt, ensuring to tighten the bolts to 10 N.m (89 lb in).

Inspect it for wear, cracks, or leakage.