Apex AMS3504 Fuel Injection Plenum Gasket Set - Upper

Brand Apex AMS3504
Position Upper
Fits Buick, Chevrolet, Oldsmobile, and Pontiac · 72 vehicles

Plenum gasket set. Seals the fuel injection plenum for dependable air and fuel delivery.

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Fuel Injection Plenum Gasket Set for GM V6 Applications

Apex AMS3504 is a fuel injection plenum gasket set for upper intake service on select GM vehicles. It is built for applications where the upper plenum seal needs to be replaced during intake repair, vacuum leak diagnosis, or fuel system service.

  • Upper fuel injection plenum gasket set for intake sealing service
  • Fits select Buick, Chevrolet, Oldsmobile, and Pontiac applications
  • Direct fit coverage for 1996-2005 model years listed below
  • Part number: AMS3504

Vehicle Fitment

  • Fits 2000-2005 Buick Century, Upper
  • Fits 2002-2005 Buick Rendezvous, Upper
  • Fits 2000-2005 Chevrolet Impala, Upper
  • Fits 2000-2005 Chevrolet Monte Carlo, Upper
  • Fits 2001-2005 Pontiac Aztek, Upper
  • Fits 1999-2005 Pontiac Grand Am, Upper
  • Fits 1999-2005 Pontiac Montana, Upper
  • Fits 1999-2004 Oldsmobile Alero, Upper
  • Fits 1996-2004 Oldsmobile Silhouette, Upper
  • Fits 1999-2003 Chevrolet Malibu, Upper
  • Fits 2000-2003 Pontiac Grand Prix, Upper
  • Fits 2000-2001 Chevrolet Lumina, Upper
  • Fits 1999 Oldsmobile Cutlass, Upper
  • Fits 1996-1998 Pontiac Trans Sport, Upper
  • Fits 1996 Chevrolet Lumina APV, Upper

What This Gasket Set Helps Address

  • Upper intake manifold vacuum leaks
  • Rough idle caused by plenum seal failure
  • Intake air leaks that affect drivability
  • Fuel injection plenum reseal during intake service
  • Replacement of worn or damaged upper intake gaskets

Installation Notes

Install on the upper intake/plenum area only for the listed applications. Clean the mating surfaces thoroughly before assembly and inspect the intake components for warpage, cracks, or contamination before reassembly. Verify engine and model-year fitment against the vehicle before installation.

Quality Assurance

Apex part AMS3504 is cataloged for the listed GM fitments and cross-references Monroe Shocks & Struts (e.g., 172286) for the same application.

This part fits 72 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2005BuickCentury3.1LV6Upper
2005BuickRendezvous3.4LV6Upper
2005ChevroletImpala3.4LV6Upper
2005ChevroletMonte Carlo3.4LV6Upper
2005PontiacAztek3.4LV6Upper
2005PontiacGrand Am3.4LV6Upper
2005PontiacMontana3.4LV6Upper
2004BuickCentury3.1LV6Upper
2004BuickRendezvous3.4LV6Upper
2004ChevroletImpala3.4LV6Upper
2004ChevroletMonte Carlo3.4LV6Upper
2004OldsmobileAlero3.4LV6Upper
2004OldsmobileSilhouette3.4LV6Upper
2004PontiacAztek3.4LV6Upper
2004PontiacGrand Am3.4LV6Upper
2004PontiacMontana3.4LV6Upper
2003BuickCentury3.1LV6Upper
2003BuickRendezvous3.4LV6Upper
2003ChevroletImpala3.4LV6Upper
2003ChevroletMalibu3.1LV6Upper
2003ChevroletMonte Carlo3.4LV6Upper
2003OldsmobileAlero3.4LV6Upper
2003OldsmobileSilhouette3.4LV6Upper
2003PontiacAztek3.4LV6Upper
2003PontiacGrand Am3.4LV6Upper
2003PontiacGrand Prix3.1LV6Upper
2003PontiacMontana3.4LV6Upper
2002BuickCentury3.1LV6Upper
2002BuickRendezvous3.4LV6Upper
2002ChevroletImpala3.4LV6Upper
2002ChevroletMalibu3.1LV6Upper
2002ChevroletMonte Carlo3.4LV6Upper
2002OldsmobileAlero3.4LV6Upper
2002OldsmobileSilhouette3.4LV6Upper
2002PontiacAztek3.4LV6Upper
2002PontiacGrand Am3.4LV6Upper
2002PontiacGrand Prix3.1LV6Upper
2002PontiacMontana3.4LV6Upper
2001BuickCentury3.1LV6Upper
2001ChevroletImpala3.4LV6Upper
2001ChevroletLumina3.1LV6Upper
2001ChevroletMalibu3.1LV6Upper
2001ChevroletMonte Carlo3.4LV6Upper
2001OldsmobileAlero3.4LV6Upper
2001OldsmobileSilhouette3.4LV6Upper
2001PontiacAztek3.4LV6Upper
2001PontiacGrand Am3.4LV6Upper
2001PontiacGrand Prix3.1LV6Upper
2001PontiacMontana3.4LV6Upper
2000BuickCentury3.1LV6Upper
2000ChevroletImpala3.4LV6Upper
2000ChevroletLumina3.1LV6Upper
2000ChevroletMalibu3.1LV6Upper
2000ChevroletMonte Carlo3.4LV6Upper
2000OldsmobileAlero3.4LV6Upper
2000OldsmobileSilhouette3.4LV6Upper
2000PontiacGrand Am3.4LV6Upper
2000PontiacGrand Prix3.1LV6Upper
2000PontiacMontana3.4LV6Upper
1999ChevroletMalibu3.1LV6Upper
1999OldsmobileAlero3.4LV6Upper
1999OldsmobileCutlass3.1LV6Upper
1999OldsmobileSilhouette3.4LV6Upper
1999PontiacGrand Am3.4LV6Upper
1999PontiacMontana3.4LV6Upper
1998OldsmobileSilhouette3.4LV6Upper
1998PontiacTrans Sport3.4LV6Upper
1997OldsmobileSilhouette3.4LV6Upper
1997PontiacTrans Sport3.4LV6Upper
1996ChevroletLumina APV3.4LV6Upper
1996OldsmobileSilhouette3.4LV6Upper
1996PontiacTrans Sport3.4LV6Upper