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.

2004 Chevrolet Impala Base, 3.8 KFACTORY OEM SERVICE PROCEDURE

Removal Procedure

Remove the left inner fender brace. Refer to Brace Replacement - Front Fender Upper Diagonal in Body Front End.
Remove the air intake duct. Refer to Air Cleaner Intake Duct Replacement .
Remove the 2 screws (2) from the 2 air cleaner housing sections.
Remove the air cleaner housing cover assembly (1).
Without disconnecting the PCM connectors, remove the PCM (4) and harness from the air cleaner housing (3).

Fig 1: View Of Air Cleaner Housing, Bolts, PCM & Harness

Courtesy of GENERAL MOTORS CORP.

Remove the air cleaner housing (1) by pulling the housing from the 2 rubber grommets in the engine compartment. Inspect the assembly for signs of damage and replace if required.

Fig 2: Removing Air Cleaner Housing

Courtesy of GENERAL MOTORS CORP.

Factory Service Tools

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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.