General Motors 8.1 — Camshaft Position (CMP) Sensor Replacement

Repair & overhaul · CMP sensor

For the General Motors 8.1, from the General Motors service manual.

Applies to: General Motors 8.1L engine

Procedure

1. Disconnect the CMP sensor harness connector from the CMP sensor.
2. Remove the CMP sensor retaining bolt.
3. Remove the CMP sensor.
4. Inspect the CMP sensor for wear, cracks or leakage.
5. Inspect the CMP sensor O-ring and replace if worn or damaged; lubricate with clean engine oil.
6. Install the CMP sensor.
7. Install the CMP sensor retaining bolt.
8. Connect the CMP sensor harness connector.

Source: General Motors service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

More General Motors repair guides →