Mfg#: 06K907386D. A diagnostic trouble code (commonly P2006) may let you know if this is faulty. If the manifold is not physically broken, this may be the repair you need.
Bremmen Parts - Intake Manifold - N14/N18 Engine R55/R56/R57/R58/R59/R60/R61 -
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GM OEM 24-25 Acadia EngineTransaxle Engine Parts-Intake Manifold Gasket 12697072