To ensure reliability, purchase GM part # 20957788 Insulator,Air Cleaner Outlet Resonator. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Buick Envision models. It fits Cadillac CT6, XT4, XTS. It also fits Chevrolet Impala, Malibu.
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