To ensure reliability, purchase GM part # 12621820 Sensor,Knock. It is sometimes referred to as GM Knock Sensor. 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, Regal models. It fits Chevrolet Cobalt, Equinox, Malibu. It also fits GMC Terrain. This also fits Saturn Aura, Sky, Vue.
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