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REPLACING PLENUM AND PLENUM GASKET on 1999 Buick Park Avenue

When the lower intake gasket is replaced do I have to replace the plenum as well and also the plenum gasket?

Asked by for the 1999 Buick Park Avenue
Definitely replace all of the gaskets, but only replace either the upper and/or lower manifold or plenum if they are defective, such as cracked, leaking, warped, EGR system damaged etc.