To ensure reliability, purchase GM part # 89060484 Piston Assembly (With Pinion). It is sometimes referred to as Buick Piston. 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 Rainier models.
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