Standard Ignition AC639 Idle Air Control Valve
OE Quality 60-Day Returns
Standard Ignition

Standard Ignition AC639 Idle Air Control Valve

Brand Standard Ignition AC639
Connector Shape Rectangular
Gaskets Included Yes
Hardware Included No
Terminal Type Blade
Fits Chevrolet

Direct-fit replacement. Replaces damaged units to restore accurate idle speed control.

Precision airflow control. Neodymium magnet and stepping motor deliver accurate pintle movement.

Durable construction. Load-tested actuator and shielded ball bearing help extend service life.

Cross-references 2-31254, 25068 and 90512528 for the same application. See all 6.

$280.80Free shipping
Out of stock
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $280.80
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Idle Air Control Valve options

Standard Ignition AC639 Idle Air Control Valve

The Standard Ignition AC639 idle air control valve is a direct-fit replacement for OE units that have failed or worn out. It helps restore stable idle control by regulating airflow through the throttle body, making it a practical choice for drivers dealing with rough idle, stalling, or idle speed that is too high or too low.

Key Features

  • Direct-fit idle air control valve replacement for OE-style service
  • Rectangular connector shape with 2 blade terminals
  • Gaskets included for installation
  • Built with a polymer-blended, isotropic neodymium/iron/boron magnet for precise pintle movement
  • Load-tested actuator for added durability and consistent output
  • High-strength stepping motor with a shielded ball bearing to resist contamination

Detailed Description

Standard Ignition AC639 is engineered for accurate idle air management in fuel injection systems. Its internal motor and magnet design are built to control pintle movement and airflow with precision, helping maintain the correct idle speed under changing engine conditions. For drivers searching for an idle air control valve for Chevrolet, Pontiac, or other GM applications, AC639 offers a direct replacement path for restoring factory-style idle behavior. This part cross-references AC Delco (e.g., IAC94) for the same application.

Common Issues It Can Help Resolve

  • Engine idle speed that is excessively high
  • Engine idle speed that drops too low
  • Stalling when coming to a stop
  • Unstable or fluctuating idle
  • Idle control problems caused by a worn OE valve

Installation Notes and Tips

Verify the rectangular connector, 2-blade terminal layout, and gasket fit before installation. Clean the throttle body and mating surfaces before mounting the valve, and inspect the electrical connector for corrosion or damaged terminals. After installation, clear any stored idle-related fault codes and confirm idle quality at warm operating temperature. Fits 2006-2011 Chevrolet Malibu, front; Fits 2006-2011 Pontiac G6, front; Fits 2007-2010 Saturn Aura, front.

Quality Assurance

Each AC639 idle air control valve is manufactured with high-grade materials and load-tested to verify actuator force beyond actual load requirements. The motor uses a shielded ball bearing to help resist environmental contamination and support long service life.

Related reading

This part fits 0 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
Directly replaces or cross-references 6 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
2-3125425068905125280280140577ACVA111IAC94