Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2006 Hummer H3 L5-3.5LFACTORY OEM SERVICE PROCEDURE
Camshaft Position (CMP) Sensor Replacement-Intake
CAMSHAFT POSITION (CMP) SENSOR REPLACEMENT-INTAKE
REMOVAL PROCEDURE
1. Disconnect the engine wiring harness electrical connector from the intake camshaft position (CMP) sensor.
2. Remove the intake CMP sensor retaining bolt.
3. Remove the intake CMP sensor from the cylinder head.Discard the O-ring seal.
INSTALLATION PROCEDURE
1. Install a new O-ring seal to the intake CMP sensor.
2. Lightly lubricate the O-ring seal with clean engine oil.
3. Install the intake CMP sensor into the cylinder head.
4. Add sealer GM P/N 12346004 (Canadian P/N 10953480) to the CMP sensor bolt threads.
5. Install the intake CMP sensor bolt.
Tighten the bolt to 10 N.m (89 lb in).
NOTE: Refer to Fastener Notice in Service Precautions.
6. Connect the engine wiring harness electrical connector to the intake CMP sensor.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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