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Crankshaft Position Sensor: Installation

  1. Install the CKP sensor with bolts and the route harness as noted during removal. Install the harness retaining clip and bolt. Tighten the bolts to specification. See TORQUE SPECIFICATIONS .
  2. Connect the CKP sensor electrical connector. Apply Sealer (12345739) or the equivalent to the keyway of the crankshaft balancer. Install the crankshaft balancer into position over the key in the crankshaft. Using Crankshaft Balancer Installer (J-29113), install the crankshaft balancer to the crankshaft.
  3. Remove the crankshaft balancer installer from the crankshaft balancer. Install the crankshaft balancer washer and the crankshaft balancer bolt. Tighten the bolt to specification.
  4. Install the lower air deflector. Lower the vehicle. Install the drive belt. Perform the CKP System Variation Learn Procedure. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.
Fig 1: Locating Crankshaft Position Sensor "A" (3.1L & 3.4L)
G00028468Courtesy of GENERAL MOTORS CORP.


  1. Replace the "O" ring, if it is damaged. Lubricate the "O" ring with clean engine. Install the sensor to the block. Install the CKP sensor attaching bolt. Tighten the bolt to specification. See TORQUE SPECIFICATIONS .
  2. Install the CKP sensor electrical connector. Install right front tire and wheel. Lower the vehicle. Perform the CKP System Variation Learn Procedure. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.
Fig 1: Locating Crankshaft Position Sensor "B" (3.1L & 3.8L)
G00028469Courtesy of GENERAL MOTORS CORP.


  1. Install the CKP sensor. Install the CKP sensor studs. Tighten the studs to specification. See TORQUE SPECIFICATIONS . Install the CKP sensor shield. Connect the CKP sensor electrical connector.
  2. Coat the engine front cover seal contact area on the crankshaft balancer, and the seal surface with clean engine oil. Install the crankshaft balancer. Install the crankshaft balancer retaining bolt. Use the Flywheel Holder (J-37096) to keep the flywheel from turning. Tighten the crankshaft balancer bolt to specification.
  3. Remove the flywheel holder. Install the torque converter cover. Install the right engine splash shield and the engine splash shield retainers. Install the right front tire and wheel. Lower the vehicle. Install the drive belt. Reconnect the negative battery cable. Perform the CKP System Variation Learn Procedure. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.
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