To change the crankshaft position (CKP), disconnect the negative
Battery Cable first. Remove the serpentine belts from the Crankshaft Pulley, and then make use of a 28mm socket in removal of the crankshaft
Harmonic Balancer retaining bolt. Use the balancer remover (J38197) and remove the crankshaft Harmonic Balancer. Next, pull off the Crankshaft Position Sensor shield without using pry bar, pull the sensor electrical connector, and remove the sensor from the block face. To install, mount the Crankshaft Position Sensor onto the face of the engine block and tighten the bolts to 20-40 n.m (14-28 lb ft). Return the Crankshaft Position Sensor shield to its place and reattach the electrical connector. Mount the balancer onto the crankshaft, apply thread sealer (GM-1052080) or equivalent on crankshaft balancer bolt threads, and tighten to 150n.m +76 degrees (110 lb ft +76 degrees). Lastly, install the serpentine accessory
Drive Belt and reconnect the negative Battery Cable.