To ensure reliability, purchase GM part # 12680074 Spark Plug Assembly, Gas Eng Ign. It is sometimes referred to as Cadillac Spark Plug. 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 models.
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