To ensure reliability, purchase GM part # 12654646 Arm Assembly, Valve Rocker. It is sometimes referred to as Cadillac Rocker Arm. 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 Cadillac ATS, CT6, CTS models.
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