To ensure reliability, purchase GM part # 12555948 Support, Spark Plug Wire. 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 Chevrolet Blazer, Silverado, Tahoe models. It fits GMC Sierra, Suburban, Yukon. It also fits Oldsmobile Bravada.
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