Standard Ignition AC66 Idle Air Control Valve

Idle Air Control Valve for GM V6 Applications

Restore stable idle control with this Standard Ignition idle air control valve, part number AC66. It is built for direct replacement use on a wide range of Buick, Chevrolet, Oldsmobile, and Pontiac applications, including Buick LeSabre, Chevrolet Impala, and Pontiac Grand Prix models.

Key Features

• Oval connector shape with 4 terminals for the specified electrical connection
• 1-port design for idle air regulation at the throttle body
• Gaskets included for service-ready installation
• Polymer-blended, isotropic neodymium/iron/boron magnet for accurate pintle and airflow control
• High-strength stepping motor for strong output torque
• Shielded ball bearing helps resist environmental contaminants
• Load-tested actuator for added durability and consistent performance
• Standard Ignition AC66 engineered with high-grade materials for extended service life

Detailed Description

Standard Ignition AC66 is an idle air control valve built to regulate bypass air and help maintain a steady engine idle across many GM passenger car applications. It is a direct-fit replacement for vehicles such as the 1996-2005 Buick LeSabre, 2000-2005 Chevrolet Impala, 1997-2003 Pontiac Grand Prix, and 1995-2002 Chevrolet Camaro. This part cross-references Delphi CV10151 and Walker Products 215-1038 for the same application.

The AC66 uses a precision magnet and stepping motor design to control pintle movement and airflow with consistent response. Its shielded bearing construction is intended to help the motor stand up to contamination, while load testing verifies the actuator can deliver force beyond actual operating load for durability in daily driving conditions. If you are replacing a worn idle air control valve on a Buick Park Avenue, Pontiac Bonneville, or Chevrolet Monte Carlo, AC66 provides the OE-style fit and electrical configuration needed for service work.

What It Helps Fix

• Rough or unstable idle speed
• Stalling when coming to a stop
• Idle flare or idle drop after startup
• Idle speed that stays too high or too low
• Throttle-body airflow control issues related to the IAC valve

Installation Notes and Tips

Verify the oval connector, 4-terminal layout, and 1-port configuration before installation. The included gasket supports a proper seal at the throttle body, and no hardware is included. Clean the mounting surface and throttle-body passage before installing the new valve to help ensure accurate idle control. Confirm vehicle application by year, make, and model before ordering; AC66 is listed for 1995-2005 Buick Park Avenue, 1996-2004 Buick Regal, 1995-1999 Buick Riviera, 1995-2005 Buick LeSabre, 2000-2005 Chevrolet Impala, 1998-2005 Chevrolet Monte Carlo, 1995-2002 Chevrolet Camaro, 1998-1999 Chevrolet Lumina, 1995-2005 Pontiac Bonneville, 1997-2003 Pontiac Grand Prix, 1995-2002 Pontiac Firebird, 1998-1999 Oldsmobile Intrigue, 1996-1999 Oldsmobile LSS, 1997-1998 Oldsmobile Regency, 1995-1996 Oldsmobile 98, and 1995-1999 Oldsmobile 88.

Quality Assurance

Standard Ignition manufactures this idle air control valve with high-grade materials and load-tested actuator performance to support long service life and consistent operation. The AC66 is built to meet the demands of everyday engine idle control on the listed Buick, Chevrolet, Oldsmobile, and Pontiac applications.