To ensure reliability, purchase GM part # 11546664 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 Buick Cascada, Encore GX, Envista models. It fits Cadillac CT4, Escalade, XT4. It also fits Chevrolet Impala, Silverado, Tahoe. This also fits GMC Sierra, Yukon.
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