Standard Ignition AC5 Idle Air Control Valve

Idle Air Control Valve for GM Applications

Standard Ignition AC5 is an idle air control valve built for precise airflow management at the throttle body. It is used on a wide range of Buick, Chevrolet, Pontiac, Oldsmobile, and Cadillac applications, including Buick Century, Chevrolet Impala, and Pontiac Grand Prix models.

Key Features

• Polymer-blended, isotropic neodymium/iron/boron magnet for accurate pintle movement and airflow control
• High-strength stepping motor for strong actuator output
• Shielded ball bearing helps resist environmental contaminants for longer service life
• Load-tested actuator for force output above actual load requirements
• Includes gasket and hardware for installation
• 1-port, 4-terminal design

Detailed Description

Standard Ignition AC5 idle air control valve is engineered to regulate bypass air and help maintain stable engine idle speed across a broad range of GM vehicles. The internal magnet, stepping motor, and shielded bearing are selected to support accurate pintle response and consistent airflow control under everyday driving conditions. This part number, AC5, is a direct-fit style replacement for many 1986-2005 Buick, Chevrolet, Pontiac, Oldsmobile, and Cadillac models, including Buick Century, Chevrolet Malibu, and Pontiac Grand Am applications.

This part cross-references Delphi CV10019 and Four Seasons 76033 for the same application.

What It Helps Address

• Rough or unstable idle speed
• Idle flare or low idle after startup
• Stalling when coming to a stop
• Idle speed that hangs or drops too slowly
• Airflow control issues at the throttle body

Installation Notes and Tips

• Fits 1997-2005 Buick Century, N/A
• Fits 1986-1989 Buick Century, N/A
• Fits 2005 Buick LaCrosse, N/A
• Fits 2002-2005 Buick Rendezvous, N/A
• Fits 2000-2005 Chevrolet Impala, N/A
• Fits 1995-2005 Chevrolet Monte Carlo, N/A
• Fits 2001-2005 Pontiac Aztek, N/A
• Fits 1994-2005 Pontiac Grand Am, N/A
• Fits 1999-2005 Pontiac Montana, N/A
• Fits 1999-2004 Oldsmobile Alero, N/A
• Fits 1996-2004 Oldsmobile Silhouette, N/A
• Fits 1997-2003 Chevrolet Malibu, N/A
• Fits 1988-2003 Pontiac Grand Prix, N/A
• Fits 1990-2001 Chevrolet Lumina, N/A
• Fits 1995-1999 Oldsmobile Cutlass, N/A
• Fits 1994-1998 Buick Skylark, N/A
• Fits 1994-1998 Oldsmobile Achieva, N/A
• Fits 1996-1998 Pontiac Trans Sport, N/A
• Fits 1995-1997 Oldsmobile Cutlass Supreme, N/A
• Fits 1993 Oldsmobile Cutlass Supreme, N/A
• Fits 1988-1989 Oldsmobile Cutlass Supreme, N/A
• Fits 1988-1996 Buick Regal, N/A
• Fits 1987-1996 Chevrolet Corsica, N/A
• Fits 1996 Chevrolet Lumina APV, N/A
• Fits 1993-1995 Chevrolet Camaro, N/A
• Fits 1990-1995 Chevrolet Corvette, N/A
• Fits 1993-1995 Pontiac Firebird, N/A
• Fits 1987-1994 Chevrolet Cavalier, N/A
• Fits 1988-1994 Oldsmobile Cutlass, N/A
• Fits 1991-1994 Pontiac Sunbird, N/A
• Fits 1990-1992 Oldsmobile Cutlass Supreme, N/A
• Fits 1987-1991 Pontiac 6000, N/A
• Fits 1988-1991 Pontiac Tempest, N/A
• Fits 1987-1990 Chevrolet Celebrity, N/A
• Fits 1987-1989 Oldsmobile Cutlass Ciera, N/A
• Fits 1987-1989 Oldsmobile Cutlass Cruiser, N/A
• Fits 1987-1988 Cadillac Cimarron, N/A
• Fits 1987 Oldsmobile Firenza, N/A

Confirm the 4-terminal connector, 1-port layout, and gasket/hardware match the original unit before installation. Cleaning the throttle body and checking for vacuum leaks during replacement can help restore stable idle control.

Quality Assurance

Standard Ignition manufactures this idle air control valve with high-grade materials and load-tested actuator performance to support consistent operation and extended service life.