To ensure reliability, purchase GM part # 12479123 Differential. It is sometimes referred to as GM Differential. 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 Rainier models. It fits Chevrolet Colorado, Trailblazer. It also fits GMC Canyon, Envoy. This also fits Oldsmobile Bravada.
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