To ensure reliability, purchase GM part # 12566587 Plug, Cyl Head Oil Gallery. 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 Allure, LaCrosse, Rendezvous models. It fits Cadillac CTS, STS. It also fits Pontiac G8.
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