Apex AMS3590 Fuel Injection Plenum Gasket Set - Upper

Apex AMS3590 Fuel Injection Plenum Gasket Set

The Apex AMS3590 fuel injection plenum gasket set is a direct-fit sealing solution for upper intake service on select GM vehicles. It is built for applications where maintaining a secure seal between the plenum and intake components is critical for stable engine performance.

Compatible With 1995-2005 Buick LeSabre, Upper; 1995-2005 Buick Park Avenue, Upper; 2000-2005 Chevrolet Impala, Upper; and other listed applications across Buick, Chevrolet, Oldsmobile, and Pontiac models.

Key Features

• Fuel injection plenum gasket set for upper intake sealing service
• Fits upper position applications on select GM passenger cars
• Applies to 1995-2005 Buick LeSabre, 1995-2005 Buick Park Avenue, and 2000-2005 Chevrolet Impala
• Also fits 1998-2005 Chevrolet Monte Carlo, 1995-2005 Pontiac Bonneville, and 1997-2005 Pontiac Grand Prix
• Part number AMS3590 for catalog and service reference

Detailed Description

Apex AMS3590 is a fuel injection plenum gasket set for upper intake sealing on a wide range of GM cars. It is listed for Buick LeSabre, Buick Park Avenue, Chevrolet Impala, Chevrolet Monte Carlo, Pontiac Bonneville, and Pontiac Grand Prix, along with additional Oldsmobile applications. Use this gasket set when servicing the upper plenum area on vehicles that require a precise seal to maintain intake integrity. The part number AMS3590 is useful when matching the correct gasket set for these upper-position applications.

What It Is Used For

• Replacing a leaking upper intake plenum gasket
• Restoring a proper seal after intake manifold service
• Addressing vacuum leaks at the plenum interface
• Correcting rough idle caused by intake sealing issues
• Supporting repair of air/fuel mixture problems related to intake leaks

Installation Notes and Tips

Verify engine and application details against the vehicle service information before installation. Clean all mating surfaces thoroughly, inspect the intake components for warpage or damage, and follow the manufacturer’s torque sequence and specifications during reassembly. For fitment reference, this part is listed for upper-position applications only.

Quality Assurance

Apex identifies this part as AMS3590 for service identification and fitment matching. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.