Pontiac 19420372 SENSOR ASM,CM/SHF POSN

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Disconnect the cable from the negative battery terminal. For 5.7L (LS1/LS6) engines, the CMP sensor is located at the rear of the engine, under the intake manifold. Remove the intake manifold. Disconnect the CMP sensor electrical connector. Remove the CMP sensor mounting bolt and remove the CMP sensor. Clean the area around the CMP sensor before removing it to prevent debris from falling into the engine once the sensor is removed. Pull the sensor up and out of the engine. Remove the CMP sensor O-ring and inspect its condition. If it's cracked, torn or otherwise deteriorated, replace it. Lubricate the sensor O-ring with clean engine oil. Installation is otherwise the reverse of removal. For 6.0L (LS2), 6.2L (LS3/LS9) and 7.0L (LS7) engines, the sensor is located at the front of the engine, mounted on the timing chain cover. Remove the drive belts and idler pulley. Remove the power steering pump. Remove the alternator, then remove the bracket mounting bolts and bracket. Remove the sensor and jumper harness assembly mounting bolts from the timing chain cover. Disconnect the engine harness electrical connector from the jumper harness connector, then disconnect the sensor from the jumper harness connector. Remove the CMP sensor O-ring and inspect its condition. If it's cracked, torn or otherwise deteriorated, replace it. Lubricate the sensor O-ring with clean engine oil. Installation is otherwise the reverse of removal.

For these engines, the steps to disconnect the CMP sensor include:Removing the cooling fan upper shroud.Raising the vehicle on jackstands.Disconnecting the lower electrical connector at the bottom of the timing chain cover.Removing the harness bracket bolts.Moving the harness/bracket until the upper electrical connector can be disconnected from the sensor.Removing the sensor mounting bolt, discarding the sensor seal, and installing a new seal onto the sensor.

To remove the CMP sensor on a V6 model, you need to disconnect the electrical connector, remove the water pump, and then remove the retaining bolt and sensor. Don't forget to discard the old o-ring.

The Camshaft Position sensor operates similarly to the crankshaft position sensor.

During installation of the CMP sensor on a V8 model, you should lubricate the new o-ring with clean engine oil and tighten the mounting bolts securely.