Standard AC27T Idle Air Control Valve

Idle Air Control Valve for GM Applications

Standard AC27T is an idle air control valve built from quality components for dependable operation. It is a direct-fit style replacement for a wide range of Chevrolet, Buick, GMC, Oldsmobile, Pontiac, and Cadillac applications from 1988-1997, including many 1990s GM trucks, vans, and passenger cars.

Key Features

• Idle air control valve for fuel injection systems
• Made from quality components for dependable performance
• 4-terminal electrical connection
• Hardware included
• Compatible with many GM vehicles, including Chevrolet C2500, Buick Regal, and GMC K3500 applications
• Standard AC27T part number for catalog and service matching

Detailed Description

The Standard AC27T idle air control valve regulates bypass air around the throttle plate to help maintain a stable idle under changing engine loads. It is used across a broad range of GM fuel-injected vehicles, including Chevrolet Camaro, Caprice, Corvette, C2500, and P30, as well as Buick LeSabre, Park Avenue, and Regal, plus GMC C3500 and K3500 models. This part cross-references Standard Ignition AC27 and AC116 for the same application.

Use AC27T when servicing idle quality concerns on GM cars and trucks that require a 4-terminal idle air control valve. The part number AC27T is also referenced in interchange listings for several aftermarket and OE-style applications, making it easier to match the correct replacement during repair.

What It Is Used For

• Correcting unstable or fluctuating idle speed
• Addressing stalling when coming to a stop
• Restoring idle control after throttle body service
• Replacing a worn or sticking idle air control valve
• Supporting proper idle behavior during cold starts and accessory load changes

Installation Notes and Tips

Verify the connector style, terminal count, and vehicle-specific notes before installation. Some listed applications require a 12mm diameter pintle, while others note auxiliary air valve or speed governor exceptions. Confirm the original part number and engine configuration on the vehicle, especially for Chevrolet and GMC truck, van, and full-size car applications. Hardware is included, but the valve should still be installed on a clean throttle body surface and checked for proper idle relearn or adjustment after replacement.

Quality Assurance

Standard manufactures this idle air control valve using quality components for dependable service. The AC27T is built to meet the needs of a wide range of GM fuel injection repairs and service replacements.