Apex AMS3594 Fuel Injection Plenum Gasket Set - Upper

Apex AMS3594 Fuel Injection Plenum Gasket Set

The Apex AMS3594 fuel injection plenum gasket set is a direct-fit sealing component for upper intake service. It is built for 2005-2009 Buick LaCrosse, 2006-2008 Buick Lucerne, and 2006-2008 Pontiac Grand Prix applications with an upper position requirement.

Key Features

• Fuel injection plenum gasket set for upper intake sealing
• Fits 2005-2009 Buick LaCrosse, upper
• Fits 2006-2008 Buick Lucerne, upper
• Fits 2006-2008 Pontiac Grand Prix, upper
• Apex part number AMS3594 for catalog matching and service lookup

Detailed Description

Use the Apex AMS3594 when servicing the upper intake plenum on the listed Buick and Pontiac vehicles. This gasket set helps restore the seal between intake components, supporting proper manifold vacuum and fuel/air separation at the plenum interface. For buyers searching for a 2005-2009 Buick LaCrosse upper plenum gasket set or a 2006-2008 Pontiac Grand Prix fuel injection plenum gasket set, AMS3594 provides the correct application reference.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Upper intake vacuum leaks
• Unstable idle caused by plenum sealing loss
• Air leakage at the fuel injection plenum joint
• Driveability issues related to intake gasket deterioration
• Service replacement for worn upper intake seals

Installation Notes and Tips

Confirm the engine configuration and upper-position fitment before installation. Clean the mating surfaces thoroughly, inspect the intake components for warpage or damage, and follow the vehicle service manual for torque sequence and tightening specifications. Recheck all vacuum and intake connections after assembly. The Apex AMS3594 should be matched to the vehicle by year, make, model, and upper position.

Quality Assurance

Apex identifies this part as AMS3594 for accurate ordering and fitment verification. Use the listed vehicle coverage to confirm application before service.