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.

2005 Buick Century CustomFACTORY OEM SERVICE PROCEDURE

Removal Procedure

Fig 1: View Of IAC Valve Electrical Connector

GM69056

Courtesy of GENERAL MOTORS CORP.

Disconnect the idle air control (IAC) valve electrical connector.

Fig 2: IAC Valve Screws

GM185614

Courtesy of GENERAL MOTORS CORP.

Remove the IAC valve screws.

Fig 3: View Of IAC Valve

GM185583

Courtesy of GENERAL MOTORS CORP.

Remove the IAC valve.

Fig 4: IAC Valve O-Ring

GM185626

Courtesy of GENERAL MOTORS CORP.

Remove the IAC valve O-ring.

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.