To ensure reliability, purchase GM part # 11588278 Retainer, Pushin,Fit Hole 6.0,Head Outside Diameter 18,L=20.8. 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, Lucerne models. It fits Cadillac ATS, CT6, CTS.
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