Removal & Installation (3.8L)

Disconnect negative battery cable. Remove serpentine belt from crankshaft pulley. Raise vehicle on hoist. Remove right front tire and wheel assembly. Remove right inner fender access cover.
Using 28-mm socket, remove crankshaft harmonic balancer bolt. Using Balancer Remover (J-38197), remove harmonic balancer. Remove crankshaft position sensor shield (DO NOT use pry bar). See Fig 1. Disconnect crankshaft position sensor harness connector. Remove crankshaft position sensor from engine block.
To install, reverse removal procedure. Apply Thread Sealer (GM 1052080) to threads of harmonic balancer bolt. Tighten sensor and harmonic balancer bolts to specification. See TORQUE SPECIFICATIONS . Perform CRANKSHAFT POSITION (CKP) SENSOR VARIATION LEARN PROCEDURE. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.

Fig 1: Removing Crankshaft Position Sensor Shield (C³ I)

Courtesy of GENERAL MOTORS CORP.