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.
2009 Buick Allure CXFACTORY OEM SERVICE PROCEDURE
Removal Procedure
- Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
- Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (L26) .
- Remove the left front inner fender brace. Refer to FRONT FENDER UPPER DIAGONAL BRACE REPLACEMENT .
- Remove the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement .
- Remove the air cleaner housing cover screws (2).
- Remove the air cleaner housing cover (1).
- Without disconnecting the PCM electrical connectors, remove the PCM and the wiring harness from the air cleaner housing assembly (3).
- Disconnect the PCM electrical connectors and remove the PCM (4).
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.