GM 91175909
Camshaft Position Sensor

The Camshaft Position sensor servicing begins with disconnecting the electrical connector that belongs to the Camshaft Position (CMP) sensor. First detach the electrical connector from the CMP sensor then remove its bolt before checking for damage on the CMP sensor signal rotor using a mirror. Install the CMP sensor following Service Precautions shown in the Fastener Notice while keeping it in position and fasten it using a bolt tightened to 10 N.m (89 lb in). Attach the electrical connector for the CMP sensor as the last step.

Service of the Camshaft Position Sensor begins by unplugging the electrical connector from the camshaft position (CMP) sensor. Use a permanent marker to mark the housing of the cmp sensor and the Cylinder Head and afterward move the cmp sensor housing bolt from the Cylinder Head and carefully remove the sensor . Place a new o-ring on the cmp sensor housing before installing it with engine oil lubrication. Avoid applying force to the installation of the cmp sensor housing because the offset drive coupling needs to interact with the offset slot on the camshaft. Position the offset coupling of the cmp sensor while aligning it with the drive slot before putting the cmp sensor housing into the Cylinder Head . Make sure to maintain proper alignment of the offset coupling throughout installation. Fasten the cmp sensor housing bolt but do not fully tighten it before turning the housing until the alignment marks meet. The cmp sensor housing bolt should be tightened to 15 n.m (11 lb ft) before reattaching the cmp sensor electrical connector. The last step is to apply a timing light to verify ignition timing.